Cisco Adaptive Security Virtual Appliance (ASAv) Quick Start Guide
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Cisco Adaptive Security Virtual Appliance (ASAv) Getting Started
Guide, 9.12
First Published: 2019-03-14
Last Modified: 2021-03-03
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C O N T E N T S
C H A P T E R 1
C H A P T E R 2
Introduction to the Cisco ASAv 1
Guidelines and Limitations for the ASAv (all models) 5
Guidelines and Limitations for the ASAv5 5
Guidelines and Limitations for the ASAv10 6
Guidelines and Limitations for the ASAv50 6
ASAv Interfaces and Virtual NICs 7
ASAv and SR-IOV Interface Provisioning 9
Guidelines and Limitations for SR-IOV Interfaces 10
Deploy the ASAv Using VMware 13
ASAv on VMware Guidelines and Limitations 13
VMware Feature Support for the ASAv 16
Prerequisites for the ASAv and VMware 17
Unpack the ASAv Software and Create a Day 0 Configuration File 18
Deploy the ASAv Using the VMware vSphere Web Client 21
Access the vSphere Web Client and Install the Client Integration Plug-In 21
Deploy the ASAv Using the VMware vSphere Web Client 22
Deploy the ASAv Using the VMware vSphere Standalone Client and Day 0 Configuration 26
Deploy the ASAv Using the OVF Tool and Day 0 Configuration 26
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C H A P T E R 3
Use the VMware vSphere Console 28
Configure a Network Serial Console Port 29
Upgrade the vCPU or Throughput License 29
Performance Tuning for the ASAv on VMware 31
Increasing Performance on ESXi Configurations 31
Multiple RX Queues for Receive Side Scaling (RSS) 32
SR-IOV Interface Provisioning 34
Enable SR-IOV on the Host Physical Adapter 36
Upgrade the Compatibility Level for Virtual Machines 38
Assign the SR-IOV NIC to the ASAv 38
ASAv on KVM Guidelines and Limitations 41
About ASAv Deployment Using KVM 42
Prerequisites for the ASAv and KVM 42
Prepare the Day 0 Configuration File 43
Prepare the Virtual Bridge XML Files 45
Hotplug Interface Provisioning 47
Hotplug a Network Interface 48
Performance Tuning for the ASAv on KVM 49
Increasing Performance on KVM Configurations 49
Multiple RX Queues for Receive Side Scaling (RSS) 52
SR-IOV Interface Provisioning 54
Requirements for SR-IOV Interface Provisioning 54
Modify the KVM Host BIOS and Host OS 54
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C H A P T E R 4
C H A P T E R 5
C H A P T E R 6
Assign PCI Devices to the ASAv 56
Deploy the ASAv On the AWS Cloud 59
About ASAv Deployment On the AWS Cloud 59
Prerequisites for the ASAv and AWS 60
Guidelines and Limitations for the ASAv and AWS 60
Configuration Migration and SSH Authentication 61
Sample Network Topology for ASAv on AWS 62
Deploy the ASAv On the Microsoft Azure Cloud 67
About ASAv Deployment On the Microsoft Azure Cloud 67
Prerequisites and System Requirements for the ASAv and Azure 67
Resources Created During Deployment 70
Routing Configuration for VMs in the Virtual Network 71
Deploy the ASAv on Microsoft Azure 72
Deploy the ASAv from Azure Resource Manager 73
Deploy the ASAv from Azure Security Center 74
Deploy ASAv for High Availability from Azure Resource Manager 76
Deploy the ASAv Using Hyper-V 79
About ASAv Deployment Using Hyper-V 79
Guidelines and Limitations for ASAv and Hyper-V 80
Prerequisites for the ASAv and Hyper-V 81
Prepare the Day 0 Configuration File 82
Deploy the ASAv with the Day 0 Configuration File Using the Hyper-V Manager 83
Install the ASAv on Hyper-V Using the Command Line 84
Install the ASAv on Hyper-V Using the Hyper-V Manager 85
Add a Network Adapter from the Hyper-V Manager 92
Modify the Network Adapter Name 94
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C H A P T E R 7
Configure MAC Address Spoofing Using the Hyper-V Manager 95
Configure MAC Address Spoofing Using the Command Line 95
Perform Initial Configuration Using ASDM 98
(Optional) Allow Access to Public Servers Behind the ASAv 98
(Optional) Run Other Wizards in ASDM 99
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1
Introduction to the Cisco ASAv
The Cisco Adaptive Security Virtual Appliance (ASAv) brings full firewall functionality to virtualized environments to secure data center traffic and multitenant environments.
You can manage and monitor the ASAv using ASDM or CLI. Other management options may be available.
•
•
Licensing for the ASAv, on page 1
•
Licensing for the ASAv, on page 1
•
Guidelines and Limitations, on page 4
•
ASAv Interfaces and Virtual NICs, on page 7
•
ASAv and SR-IOV Interface Provisioning, on page 9
Hypervisor Support
For hypervisor support, see Cisco ASA Compatibility .
Licensing for the ASAv
The ASAv uses Cisco Smart Software Licensing. For complete information, see Smart Software Licensing
(ASAv, ASA on Firepower) .
Note You must install a smart license on the ASAv. Until you install a license, throughput is limited to 100 Kbps so you can perform preliminary connectivity tests. A smart license is required for regular operation.
See the following sections for information about ASAv licensing entitlements and resource specifications for the supported private and public deployment targets.
Licensing for the ASAv
See the following tables for information about ASAv licensing entitlements, licensing states, requried resources, and model specifications:
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Licensing for the ASAv
•
Table 1: ASAv Smart License Entitlements
—Shows the compliant resources scenarios that match license entitlement for the ASAv platform.
Note The ASAv uses Cisco Smart Software Licensing. A smart license is required for regular operation. Until you install a license, throughput is limited to 100 Kbps so you can perform preliminary connectivity tests.
•
Table 2: ASAv Licensing States
—Shows the ASAv states and messages connected to resources and entitlement for the ASAvs.
•
Table 3: ASAv Model Descriptions and Specifications
—Shows the ASAv models and associated specifications, resource requirements, and limitations.
Smart License Entitlements
The ASAv uses Cisco Smart Software Licensing. For detailed information, see Smart Software Licensing for the ASAv and ASA .
Note You must install a smart license on the ASAv. Until you install a license, throughput is limited to 100 Kbps so you can perform preliminary connectivity tests. A smart license is required for regular operation.
Table 1: ASAv Smart License Entitlements
License Entitlement
Lab Edition Mode (no license)
ASAv5 (100M) vCPU/RAM
All Platforms
ASAv10 (1 GB)
ASAv30 (2 GB)
ASAv50 (10 GB)
Throughput
100Kbps
1vCPU/1 GB to 1.5 GB
(2 GB recommended)
1vCPU/2 GB
4vCPU/8 GB
8vCPU/16 GB
100Mbps
1Gbps
2Gbps
10Gbps
Rate Limiter Enforced
Yes
Yes
Yes
Yes
Yes
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Licensing for the ASAv
Licensing States
Table 2: ASAv Licensing States
State
Compliant
Non-compliant
Resources vs. Entitlement
Resource = Entitlement limits
(vCPU, GB of RAM)
Resources < Entitlement limits
Under-provisioned
Resources > Entitlement limits
Over-provisioned
Actions and Messages
Appliances optimally resourced
ASAv5 (1vCPU,1G), ASAv10
(1vCPU,2G), ASAv30
(4vCPU,8G), ASAv50 (8vCPU,
16G)
No actions, no messages
No actions while Warning messages are logged that ASAv cannot run at licensed throughput.
ASAv rate limiter engages to limit performance and log Warnings on the console.
ASAv10, ASAv30, ASAv50 reboot after logging Error messages on the console.
Model Descriptions and Specifications
Table 3: ASAv Model Descriptions and Specifications
Model
ASAv5
License Requirement
Smart License
See the following specifications:
• 100 Mbps throughput
• 1 vCPU
• 1 GB RAM (adjustable to 1.5 GB)
Note For optimum performance we recommend 2 GB of memory for the
ASAv5.
• 50,000 concurrent firewall connections
• Does not support AWS
• Supports Azure on a Standard D3 and Standard D3_v2 instances
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Introduction to the Cisco ASAv
Guidelines and Limitations
Model
ASAv10
ASAv30
ASAv50
License Requirement
Smart License
See the following specifications:
• 1 Gbps throughput
• 1 vCPU
• 2 GB RAM
• 100,000 concurrent firewall connections
• Supports AWS on c3.large, c4.large, and m4.large instances
• Supports Azure on a Standard D3 and Standard D3_v2 instances
Smart License
See the following specifications:
• 2 Gbps throughput
• 4 vCPUs
• 8 GB RAM
• 500,000 concurrent firewall connections
• Supports AWS on c3.xlarge, c4.xlarge, and m4.xlarge instances
• Supports Azure on a Standard D3 and Standard D3_v2 instances
Smart License
See the following specifications:
• 10 Gbps throughput
• 8 vCPUs (minimum of 8 physical cores per CPU socket required; cannot be provisioned across multiple CPU sockets)
• 16 GB RAM
• 2,000,000 concurrent firewall connections
• Does not support AWS, Microsoft Azure, or Hyper-V
Guidelines and Limitations
The ASAv firewall functionality is very similar to the Cisco ASA hardware firewalls, but with the following guidelines and limitations.
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Guidelines and Limitations for the ASAv (all models)
Guidelines and Limitations for the ASAv (all models)
Disk Storage
The ASAv supports a maximum virtual disk of 8 GB by default. You cannot increase the disk size beyond 8
GB. Keep this in mind when you provision your VM resources.
Context Mode Guidelines
Supported in single context mode only. Does not support multiple context mode.
Failover for High Availability Guidelines
For failover deployments, make sure that the standby unit has the same model license; for example, both units should be ASAv30s.
Important When creating a high availability pair using ASAv, it is necessary to add the data interfaces to each ASAv in the same order. If the exact same interfaces are added to each ASAv, but in different order, errors may be presented at the ASAv console. Failover functionality may also be affected.
Unsupported ASA Features
The ASAv does not support the following ASA features:
• Adjustable
• Clustering
• Multiple context mode
• Active/Active failover
• EtherChannels
• Shared AnyConnect Premium Licenses
Limitations
• The ASAv is not compatible with the 1.9.5 i40en host driver for the x710 NIC. Older or newer driver versions will work. (VMware only)
Guidelines and Limitations for the ASAv5
Performance Guidelines
• Supports 8000 connections per second, 25 maximum VLANs, 50,000 concurrent session, and 50 VPN sessions.
• The ASAv5 is intended for users who require a small memory footprint and small throughput, so that you can deploy larger numbers of ASAv5s without using unnecessary memory.
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Guidelines and Limitations for the ASAv10
• Beginning with 9.5(1.200), the memory requirement for the AVAv5 was reduced to 1GB. Downgrading the available memory on an ASAv5 from 2 GB to 1 GB is not supported. To run with 1 GB of memory, the ASAv5 VM must be redeployed with version 9.5(1.200) or later. Similarly, if you try to downgrade to a version earlier than 9.5(1.200), you must increase the memory to 2 GB.
Note For optimum performance we recommend 2 GB of memory for the ASAv5.
• In some situations, the ASAv5 may experience memory exhaustion. This can occur during certain resource heavy applications, such as enabling AnyConnect or downloading files.
• Console messages related to spontaneous reboots or critical syslogs related to memory usage are symptoms of memory exhaustion.
• In these cases, you can enable the ASAv5 to be deployed in a VM with 1.5 GB of memory. To change from 1GB to 1.5 GB, power down your VM, modify the memory, and power the VM back on.
• You can display a summary of the maximum memory and current free memory available to the system using the show memory command from the CLI.
• The ASAv5 will begin to drop packets soon after the threshold of 100 Mbps is reached (there is some headroom so that you get the full 100 Mbps).
Limitations
• ASAv5 is not compatible with AnyConnect HostScan 4.8, which requires 2 GB of RAM.
• ASAv5 is not supported on Amazon Web Services (AWS).
• Jumbo frames are not supported.
Guidelines and Limitations for the ASAv10
Performance Guidelines
• Jumbo frame reservation on the ASAv10 with 9 or more configured e1000 interfaces may cause the device to reload. If jumbo-frame reservation is enabled, reduce the number of interfaces to 8 or less.
The exact number of interfaces will depend on how much memory is needed for the operation of other features configured, and could be less than 8.
Guidelines and Limitations for the ASAv50
Performance Guidelines
• Supports 10Gbps of aggregated traffic.
• Supported only on ESXi and KVM.
• Supports the following practices to improve ASAv performance:
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ASAv Interfaces and Virtual NICs
• Numa nodes
• Multiple RX queues
• SR-IOV provisioning
• See
Performance Tuning for the ASAv on VMware, on page 31
and
for more information.
• CPU pinning is recommended to achieve full throughput rates; see
Increasing Performance on ESXi
and
Increasing Performance on KVM Configurations, on page 49
.
• Jumbo frame reservation with a mix of e1000 and i40e-vf interfaces may cause the i40e-vf interfaces to remain down. If jumbo-frame reservation is enabled, do not mix interface types that use e1000 and i40e-vf drivers.
Limitations
• Transparent mode is not supported.
• The ASAv is not compatible with the 1.9.5 i40en host driver for the x710 NIC. Older or newer driver versions will work. (VMware only)
• Not supported on Amazon Web Services (AWS), Microsoft Azure, and Hyper-V.
• The ixgbe vNIC is not supported in this release.
ASAv Interfaces and Virtual NICs
As a guest on a virtualized platform, the ASAv uses the network interfaces of the underlying physical platform.
Each ASAv interface maps to a virtual NIC (vNIC).
• ASAv Interfaces
• Supported vNICs
ASAv Interfaces
The ASAv includes the following Gigabit Ethernet interfaces:
• Management 0/0
For AWS and Azure, Management 0/0 can be a traffic-carrying “outside” interface.
• GigabitEthernet 0/0 through 0/8. Note that the GigabitEthernet 0/8 is used for the failover link when you deploy the ASAv as part of a failover pair.
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Introduction to the Cisco ASAv
Supported vNICs
Note The ASAv defines GigabitEthernet interfaces using the VMXNET3 driver as
10Gbps links.
The ASAv defines GigabitEthernet interfaces using the E1000 driver as 1Gbps links. Note that VMware no longer recommends using the E1000 driver.
• Hyper-V supports up to eight interfaces. Management 0/0 and GigabitEthernet 0/0 through 0/6. You can use GigabitEthernet 0/6 as a failover link.
Supported vNICs
The ASAv supports the following vNICs:
Table 4: Supported vNics
Table 5: Supported vNics vNIC Type e1000 virtio ixgbe-vf vmxnet3
Hypervisor Support
VMware KVM
Yes
No
Yes
Yes
Yes
Yes
Yes
No
ASAv Version
9.2(1) and later
9.3(2.200) and later
Notes
VMware default
KVM default
9.8(1) and later
9.9(2) and later
AWS default; ESXi and KVM for
SR-IOV support
When using vmxnet3, you need to disable Large Receive Offload (LRO) to avoid poor TCP performance. See
9.10(1) and later KVM for SR-IOV support i40e-vf No Yes
Disable LRO for VMware and VMXNET3
Large Receive Offload (LRO) is a technique for increasing inbound throughput of high-bandwidth network connections by reducing CPU overhead. It works by aggregating multiple incoming packets from a single stream into a larger buffer before they are passed higher up the networking stack, thus reducing the number of packets that have to be processed. However, LRO can lead to TCP perfomance problems where network packet delivery may not flow consistently and could be "bursty" in congested networks.
Important VMware enables LRO by default to increase overall throughput. It is therefore a requirement to disable LRO for ASAv deployments on this platform.
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ASAv and SR-IOV Interface Provisioning
You can disable LRO directly on the ASAv virtual machine. Power off the virtual machine before you make any configuration changes.
1.
Find the ASAv virtual machine in the vSphere Web Client inventory.
a.
To find a virtual machine, select a data center, folder, cluster, resource pool, or host.
b.
Click the Related Objects tab and click Virtual Machines .
2.
Right-click the virtual machine and select Edit Settings .
3.
Click VM Options .
4.
Expand Advanced .
5.
Under Configuration Parameters, click the Edit Configuration button.
6.
Click Add Parameter and enter a name and value for the LRO parameters:
• Net.VmxnetSwLROSL | 0
• Net.Vmxnet3SwLRO | 0
• Net.Vmxnet3HwLRO | 0
• Net.Vmxnet2SwLRO | 0
• Net.Vmxnet2HwLRO | 0
Note Optionally, if the LRO parameters exist, you can examine the values and change them if needed. If a parameter is equal to 1, LRO is enabled. If equal to 0, LRO is disabled.
7.
Click OK to save your changes and exit the Configuration Parameters dialog box.
8.
Click Save .
See the following VMware support articles for more information:
• VMware KB 1027511
• VMware KB 2055140
ASAv and SR-IOV Interface Provisioning
Single Root I/O Virtualization (SR-IOV) allows multiple VMs running a variety of guest operating systems to share a single PCIe network adapter within a host server. SR-IOV allows a VM to move data directly to and from the network adapter, bypassing the hypervisor for increased network throughput and lower server
CPU burden. Recent x86 server processors include chipset enhancements, such as Intel VT-d technology, that facilitate direct memory transfers and other operations required by SR-IOV.
The SR-IOV specification defines two device types:
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Introduction to the Cisco ASAv
Guidelines and Limitations for SR-IOV Interfaces
• Physical Function (PF)—Essentially a static NIC, a PF is a full PCIe device that includes SR-IOV capabilities. PFs are discovered, managed, and configured as normal PCIe devices. A single PF can provide management and configuration for a set of virtual functions (VFs).
• Virtual Function (VF)—Similar to a dynamic vNIC, a VF is a full or lightweight virtual PCIe device that provides at least the necessary resources for data movements. A VF is not managed directly but is derived from and managed through a PF. One or more VFs can be assigned to a VM.
SR-IOV is defined and maintained by the Peripheral Component Interconnect Special Interest Group ( PCI
SIG ), an industry organization that is chartered to develop and manage the PCI standard. For more information about SR-IOV, see PCI-SIG SR-IOV Primer: An Introduction to SR-IOV Technology .
Provisioning SR-IOV interfaces on the ASAv requires some planning, which starts with the appropriate operating system level, hardware and CPU, adapter types, and adapter settings.
Guidelines and Limitations for SR-IOV Interfaces
The specific hardware used for ASAv deployment can vary, depending on size and usage requirements.
Licensing for the ASAv, on page 1
explains the compliant resource scenarios that match license entitlement for the different ASAv platforms. In addition, SR-IOV Virtual Functions require specific system resources.
Host Operating System and Hypervisor Support
SR-IOV support and VF drivers are available for:
• Linux 2.6.30 kernel or later
The ASAv with SR-IOV interfaces is currently supported on the following hypervisors:
• VMware vSphere/ESXi
• QEMU/KVM
• AWS
Hardware Platform Support
Note You should deploy the ASAv on any server class x86 CPU device capable of running the supported virtualization platforms.
This section describes hardware guidelines for SR-IOV interfaces. Although these are guidelines and not requirements, using hardware that does not meet these guidelines may result in functionality problems or poor performance.
A server that supports SR-IOV and that is equipped with an SR-IOV-capable PCIe adapter is required. You must be aware of the following hardware considerations:
• The capabilities of SR-IOV NICs, including the number of VFs available, differ across vendors and devices.
• Not all PCIe slots support SR-IOV.
• SR-IOV-capable PCIe slots may have different capabilities.
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Guidelines and Limitations for SR-IOV Interfaces
Note You should consult your manufacturer's documentation for SR-IOV support on your system.
• For VT-d enabled chipsets, motherboards, and CPUs, you can find information from this page of virtualization-capable IOMMU supporting hardware . VT-d is a required BIOS setting for SR-IOV systems.
• For VMware, you can search their online Compatibility Guide for SR-IOV support.
• For KVM, you can verify CPU compatibility . Note that for the ASAv on KVM we only support x86 hardware.
Note We tested the ASAv with the Cisco UCS C-Series Rack Server . Note that the
Cisco UCS-B server does not support the ixgbe-vf vNIC.
Supported NICs for SR-IOV
• Intel Ethernet Network Adapter X710
Attention The ASAv is not compatible with the 1.9.5 i40en host driver for the x710 NIC.
Older or newer driver versions will work. (VMware only)
• Intel Ethernet Server Adapter X520 - DA2
• Intel Ethernet Server Adapter X540
CPUs
• x86_64 multicore CPU
Intel Sandy Bridge or later (Recommended)
Note We tested the ASAv on Intel's Broadwell CPU (E5-2699-v4) at 2.3GHz.
• Cores
• Minimum of 8 physical cores per CPU socket
• The 8 cores must be on a single socket.
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Guidelines and Limitations for SR-IOV Interfaces
Note CPU pinning is recommended to achieve full throughput rates on the ASAv50 and ASAv100; see
Increasing Performance on ESXi Configurations, on page 31
and
Increasing Performance on KVM Configurations, on page 49 .
BIOS Settings
SR-IOV requires support in the BIOS as well as in the operating system instance or hypervisor that is running on the hardware. Check your system BIOS for the following settings:
• SR-IOV is enabled
• VT-x (Virtualization Technology) is enabled
• VT-d is enabled
• (Optional) Hyperthreading is disabled
We recommend that you verify the process with the vendor documentation because different systems have different methods to access and change BIOS settings.
Limitations
Be aware of the following limitations when using ixgbe-vf interfaces:
• The guest VM is not allowed to set the VF to promiscuous mode. Because of this, transparent mode is not supported when using ixgbe-vf.
• The guest VM is not allowed to set the MAC address on the VF. Because of this, the MAC address is not transferred during HA like it is done on other ASA platforms and with other interface types. HA failover works by transferring the IP address from active to standby.
• The Cisco UCS-B server does not support the ixgbe-vf vNIC.
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Deploy the ASAv Using VMware
You can deploy the ASAv on any server class x86 CPU device that is capable of running VMware ESXi.
•
ASAv on VMware Guidelines and Limitations, on page 13
•
VMware Feature Support for the ASAv, on page 16
•
Prerequisites for the ASAv and VMware, on page 17
•
Unpack the ASAv Software and Create a Day 0 Configuration File, on page 18
•
Deploy the ASAv Using the VMware vSphere Web Client, on page 21
•
Deploy the ASAv Using the VMware vSphere Standalone Client and Day 0 Configuration, on page 26
•
Deploy the ASAv Using the OVF Tool and Day 0 Configuration, on page 26
•
Access the ASAv Console, on page 27
•
Upgrade the vCPU or Throughput License, on page 29
•
Performance Tuning for the ASAv on VMware, on page 31
ASAv on VMware Guidelines and Limitations
You can create and deploy multiple instances of the ASAv on an ESXi server. The specific hardware used for ASAv deployments can vary, depending on the number of instances deployed and usage requirements.
Each virtual appliance you create requires a minimum resource allocation—memory, number of CPUs, and disk space—on the host machine.
Review the following guidelines and limitations before you deploy the ASAv.
ASAv on VMware ESXi System Requirements
Make sure to conform to the specifications below to ensure optimal performance. The ASAv has the following requirements:
• The host CPU must be a server class x86-based Intel or AMD CPU with virtualization extension.
For example, ASAv performance test labs use as minimum the following: Cisco Unified Computing
System ™ (Cisco UCS ® ) C series M4 server with the Intel ® Xeon ® CPU E5-2690v4 processors running at 2.6GHz.
• ASAv supports ESXi version 6.0, 6.5, and 6.7.
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Deploy the ASAv Using VMware
ASAv on VMware Guidelines and Limitations
OVF File Guidelines
The selection of the asav-vi.ovf or asav-esxi.ovf file is based on the deployment target:
• asav-vi—For deployment on vCenter
• asav-esxi—For deployment on ESXi (no vCenter)
• The ASAv OVF deployment does not support localization (installing the components in non-English mode). Be sure that the VMware vCenter and the LDAP servers in your environment are installed in an
ASCII-compatible mode.
• You must set your keyboard to United States English before installing the ASAv and for using the VM console.
• When the ASAv is deployed, two different ISO images are mounted on the ESXi hypervisor:
• The first drive mounted has the OVF environment variables generated by vSphere.
• The second drive mounted is the day0.iso.
Attention You can unmoumt both drives after the ASAv virtual machine has booted.
However, Drive 1 (with the OVF environment variables) will always be mounted every time the ASAv is powered off/on, even if Connect at Power On is unchecked.
Failover for High Availability Guidelines
For failover deployments, make sure that the standby unit has the same license entitlement; for example, both units should have the 2Gbps entitlement.
Important When creating a high availability pair using ASAv, it is necessary to add the data interfaces to each ASAv in the same order. If the exact same interfaces are added to each ASAv, but in different order, errors may be presented at the ASAv console. Failover functionality may also be affected.
IPv6 Guidelines
You cannot specify IPv6 addresses for the management interface when you first deploy the ASAv OVF file using the VMware vSphere Web Client; you can later add IPv6 addressing using ASDM or the CLI.
vMotion Guidelines
• VMware requires that you only use shared storage if you plan to use vMotion. During ASAv deployment, if you have a host cluster you can either provision storage locally (on a specific host) or on a shared host.
However, if you try to vMotion the ASAv to another host, using local storage will produce an error.
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ASAv on VMware Guidelines and Limitations
Memory and vCPU Allocation for Throughput and Licensing
• The memory allocated to the ASAv is sized specifically for the throughput level. Do not change the memory setting or any vCPU hardware settings in the Edit Settings dialog box unless you are requesting a license for a different throughput level. Under-provisioning can affect performance.
Note If you need to change the memory or vCPU hardware settings, use only the values documented in
Licensing for the ASAv, on page 1
. Do not use the
VMware-recommended memory configuration minimum, default, and maximum values.
In some situations, the ASAv5 may experience memory exhaustion. This can occur during certain resource heavy applications, such as enabling AnyConnect or downloading files. Console messages related to spontaneous reboots or critical syslogs related to memory usage are symptoms of memory exhaustion.
In these cases, you can enable the ASAv5 to be deployed in a VM with 1.5 GB of memory. To change from 1GB to 1.5GB, power down your VM, modify the memory, and power the VM back on.
CPU Reservation
• By default the CPU reservation for the ASAv is 1000 MHz. You can change the amount of CPU resources allocated to the ASAv by using the shares, reservations, and limits settings (Edit Settings > Resources
> CPU). Lowering the CPU Reservation setting from 1000 Mhz can be done if the ASAv can perform its required purpose while under the required traffic load with the lower setting. The amount of CPU used by an ASAv depends on the hardware platform it is running on as well as the type and amount of work it is doing.
You can view the host’s perspective of CPU usage for all of your virtual machines from the CPU Usage
(MHz) chart, located in the Home view of the Virtual Machine Performance tab. Once you establish a benchmark for CPU usage when the ASAv is handling typical traffic volume, you can use that information as input when adjusting the CPU reservation.
See the CPU Performance Enhancement Advice published by VMware for more information.
• You can use the ASAv show vm and show cpu commands or the ASDM Home > Device Dashboard >
Device Information > Virtual Resources tab or the Monitoring > Properties > System Resources
Graphs > CPU pane to view the resource allocation and any resources that are over- or under-provisioned.
Transparent Mode on UCS B Series Hardware Guidelines
MAC flaps have been observed in some ASAv configurations running in transparent mode on Cisco UCS B
Series hardware. When MAC addresses appear from different locations you will get dropped packets.
The following guidelines help prevent MAC flaps when you deploy the ASAv in transparent mode in VMware environments:
• VMware NIC teaming—If deploying the ASAv in transparent mode on UCS B Series, the Port Groups used for the Inside and Outside interfaces must have only 1 Active Uplink, and that uplink must be the same. You configure VMware NIC teaming in vCenter.
See the VMware documentation for complete information on how to configure NIC teaming .
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VMware Feature Support for the ASAv
• ARP inspection—Enable ARP inspection on the ASAv and statically configure the MAC and ARP entry on the interface you expect to receive it on. See the Cisco ASA Series General Operations Configuration
Guide for information about ARP inspection and how to enable it.
ASAv Unreachable After You Disconnect a CD/DVD Drive
You can connect and disconnect a CD/DVD drives to an ASAv virtual machine using the Edit Settings dialog box. You connect and disconnect the device from the VM Hardware panel.
Important We recommend that you DO NOT disconnect any of the CD/DVD drives on the ASAv, as this can cause the
ASAv to become unreachable.
Workaround
If the ASAv is in an unreachable state due to a disconnected CD/DVD drive, do the following:
1.
Click the Monitor tab, then click Notifications .
2.
Look for an alert that says: The guest operating system has locked the CD-ROM door and is probably using the CD-ROM, which can prevent the guest from recognizing media changes. If possible, eject the
CD-ROM from inside the guest before disconnecting. Disconnect anyway and override the lock?
3.
Acknowledge the alert. When prompted, choose Yes on the popup, then click OK .
4.
The ASAv virtual machine should again be reachable.
Additional Guidelines and Limitations
• If you are running ESXi 5.0, the vSphere Web Client is not supported for ASAv OVF deployment; use the vSphere client instead.
VMware Feature Support for the ASAv
The following table lists the VMware feature support for the ASAv.
Table 6: VMware Feature Support for the ASAv
Feature
Cold Clone
DRS
Hot add
Description
The VM is powered off during cloning.
Support (Yes/No)
Yes
Used for dynamic resource scheduling and distributed power management.
Yes
The VM is running during an addition.
No
Comment
¯
See VMware guidelines .
¯
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Prerequisites for the ASAv and VMware
Feature
Hot clone
Hot removal
Snapshot
Suspend and resume vCloud Director
VM migration vMotion
Description Support (Yes/No)
The VM is running during cloning.
No
The VM is running during removal.
No
The VM freezes for a few seconds.
Yes
The VM is suspended, then resumed.
Allows automatic deployment of VMs.
The VM is powered off during migration.
Yes
No
Yes
Used for live migration of
VMs.
Yes
VMware FT Used for HA on VMs.
No
VMware HA
VMware HA with VM heartbeats
VMware vSphere
Standalone Windows
Client
VMware vSphere Web
Client
Used for ESXi and server failures.
Yes
Used for VM failures.
No
Used to deploy VMs.
Used to deploy VMs.
Yes
Yes
Prerequisites for the ASAv and VMware
You can deploy the ASAv using the VMware vSphere Web Client, vSphere standalone client, or the OVF tool. See Cisco ASA Compatibility for system requirements.
Security Policy for a vSphere Standard Switch
For a vSphere switch, you can edit Layer 2 security policies and apply security policy exceptions for port groups used by the ASAv interfaces. See the following default settings:
• Promiscuous Mode: Reject
Comment
¯
¯
Use with care. You may lose traffic. Failover may occur.
¯
¯
¯
Use shared storage. See
vMotion Guidelines, on page 14 .
Use ASAv failover for
ASAv VM failures.
Use ASAv failover for
ASAv VM failures.
Use ASAv failover for
ASAv VM failures.
¯
¯
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Unpack the ASAv Software and Create a Day 0 Configuration File
• MAC Address Changes: Accept
• Forged Transmits: Accept
You may need to modify these settings for the following ASAv configurations. See the vSphere documentation for more information.
Table 7: Port Group Security Policy Exceptions
Security Exception
Promiscuous Mode
MAC Address
Changes
Routed Firewall Mode
No Failover
<any>
<any>
Failover
<any>
Accept
Forged Transmits <any> Accept
Transparent Firewall Mode
No Failover
Accept
<any>
Failover
Accept
Accept
Accept Accept
Unpack the ASAv Software and Create a Day 0 Configuration
File
You can prepare a Day 0 configuration file before you launch the ASAv. This file is a text file that contains the ASAv configuration to be applied when the ASAv is launched. This initial configuration is placed into a text file named “day0-config” in a working directory you chose, and is manipulated into a day0.iso file that is mounted and read on first boot. At the minimum, the Day 0 configuration file must contain commands to activate the management interface and set up the SSH server for public key authentication, but it can also contain a complete ASA configuration. A default day0.iso containing an empty day0-config is provided with the release. The day0.iso file (either your custom day0.iso or the default day0.iso) must be available during first boot.
Before you begin
We are using Linux in this example, but there are similar utilities for Windows.
• To automatically license the ASAv during initial deployment, place the Smart Licensing Identity (ID)
Token that you downloaded from the Cisco Smart Software Manager in a text file named ‘idtoken’ in the same directory as the Day 0 configuration file.
• If you want to access and configure the ASAv from the serial port on the hypervisor instead of the virtual
VGA console, you should include the console serial setting in the Day 0 configuration file to use the serial port on first boot.
• If you want to deploy the ASAv in transparent mode, you must use a known running ASA config file in transparent mode as the Day 0 configuration file. This does not apply to a Day 0 configuration file for a routed firewall.
• See the OVF file guidelines in
ASAv on VMware Guidelines and Limitations, on page 13
for additional information about how the ISO images are mounted on the ESXi hypervisor.
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Unpack the ASAv Software and Create a Day 0 Configuration File
Step 1
Step 2
Step 3
Download the ZIP file from Cisco.com, and save it to your local disk: https://www.cisco.com/go/asa-software
Note A Cisco.com login and Cisco service contract are required.
Unzip the file into a working directory. Do not remove any files from the directory. The following files are included:
• asav-vi.ovf—For vCenter deployments.
• asav-esxi.ovf—For non-vCenter deployments.
• boot.vmdk—Boot disk image.
• disk0.vmdk—ASAv disk image.
• day0.iso—An ISO containing a day0-config file and optionally an idtoken file.
• asav-vi.mf—Manifest file for vCenter deployments.
• asav-esxi.mf—Manifest file for non-vCenter deployments.
Enter the CLI configuration for the ASAv in a text file called “day0-config.” Add interface configurations for the three interfaces and any other configuration you want.
The fist line should begin with the ASA version. The day0-config should be a valid ASA configuration. The best way to generate the day0-config is to copy the desired parts of a running config from an existing ASA or ASAv. The order of the lines in the day0-config is important and should match the order seen in an existing show running-config command output.
We provide two examples of the day0-config file. The first example shows a day0-config when deploying an ASAv with
Gigabit Ethernet interfaces. The second example shows a day0-config when deploying an ASAv with 10 Gigabit Ethernet interfaces. You would use this day0-config to deploy an ASAv50 with SR-IOV interfaces; see
Guidelines and Limitations, on page 34
.
Example:
ASA Version 9.4.1
!
console serial interface management0/0 nameif management security-level 100 ip address 192.168.1.1 255.255.255.0
no shutdown interface gigabitethernet0/0 nameif inside security-level 100 ip address 10.1.1.2 255.255.255.0
no shutdown interface gigabitethernet0/1 nameif outside security-level 0 ip address 198.51.100.2 255.255.255.0
no shutdown http server enable http 192.168.1.0 255.255.255.0 management crypto key generate rsa modulus 1024 username AdminUser password paSSw0rd ssh 192.168.1.0 255.255.255.0 management
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Step 4
Step 5
Step 6 aaa authentication ssh console LOCAL call-home http-proxy 10.1.1.1 port 443 license smart feature tier standard throughput level 2G
Example:
ASA Version 9.8.1
!
console serial interface management 0/0 management-only nameif management security-level 0 ip address 192.168.0.230 255.255.255.0
!
interface GigabitEthernet0/0 nameif inside security-level 100 ip address 10.10.10.10 255.255.255.0
ipv6 address 2001:10::1/64
!
interface GigabitEthernet0/1 nameif outside security-level 0 ip address 10.10.20.10 255.255.255.0
ipv6 address 2001:20::1/64
!
route management 0.0.0.0 0.0.0.0 192.168.0.254
!
username cisco password cisco123 privilege 15
!
aaa authentication ssh console LOCAL ssh 0.0.0.0 0.0.0.0 management ssh timeout 60 ssh version 2
!
http 0.0.0.0 0.0.0.0 management
!
logging enable logging timestamp logging buffer-size 99999 logging buffered debugging logging trap debugging
!
dns domain-lookup management
DNS server-group DefaultDNS name-server 64.102.6.247
!
license smart feature tier standard throughput level 10G
!
crypto key generate rsa modulus 2048
(Optional) Download the Smart License identity token file issued by the Cisco Smart Software Manager to your PC.
(Optional) Copy the ID token from the download file and put it in a text file named ‘idtoken’ that only contains the ID token.
The Identity Token automatically registers the ASAv with the Smart Licensing server.
Generate the virtual CD-ROM by converting the text file to an ISO file:
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Deploy the ASAv Using the VMware vSphere Web Client
Step 7
Step 8
Step 9
Example: stack@user-ubuntu:-/KvmAsa$ sudo genisoimage -r -o day0.iso day0-config idtoken
I: input-charset not specified, using utf-8 (detected in locale settings)
Total translation table size: 0
Total rockridge attributes bytes: 252
Total directory bytes: 0
Path table size (byptes): 10
Max brk space used 0
176 extents written (0 MB) stack@user-ubuntu:-/KvmAsa$
Compute a new SHA1 value on Linux for the day0.iso:
Example: openssl dgst -sha1 day0.iso
SHA1(day0.iso)= e5bee36e1eb1a2b109311c59e2f1ec9f731ecb66 day0.iso
Include the new checksum in the asav-vi.mf file in the working directory and replace the day0.iso SHA1 value with the newly generated one.
Example:
SHA1(asav-vi.ovf)= de0f1878b8f1260e379ef853db4e790c8e92f2b2
SHA1(disk0.vmdk)= 898b26891cc68fa0c94ebd91532fc450da418b02
SHA1(boot.vmdk)= 6b0000ddebfc38ccc99ac2d4d5dbfb8abfb3d9c4
SHA1(day0.iso)= e5bee36e1eb1a2b109311c59e2f1ec9f731ecb66
Copy the day0.iso file into the directory where you unzipped the ZIP file. You will overwrite the default (empty) day0.iso
file.
When any VM is deployed from this directory, the configuration inside the newly generated day0.iso is applied.
Deploy the ASAv Using the VMware vSphere Web Client
This section describes how to deploy the ASAv using the VMware vSphere Web Client. The Web Client requires vCenter. If you do not have vCenter, see
Deploy the ASAv Using the VMware vSphere Standalone
Client and Day 0 Configuration , or Deploy the ASAv Using the OVF Tool and Day 0 Configuration
.
•
Access the vSphere Web Client and Install the Client Integration Plug-In, on page 21
•
Deploy the ASAv Using the VMware vSphere Web Client, on page 21
Access the vSphere Web Client and Install the Client Integration Plug-In
This section describes how to access the vSphere Web Client. This section also describes how to install the
Client Integration Plug-In, which is required for ASAv console access. Some Web Client features (including the plug-in) are not supported on the Macintosh. See the VMware website for complete client support information.
Step 1 Launch the VMware vSphere Web Client from your browser:
https://vCenter_server:port/vsphere-client/
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Step 2
Step 3
By default, the port is 9443.
(One time only) Install the Client Integration Plug-in so that you can access the ASAv console.
a.
In the login screen, download the plug-in by clicking Download the Client Integration Plug-in .
b.
Close your browser and then install the plug-in using the installer.
c.
After the plug-in installs, reconnect to the vSphere Web Client.
Enter your username and password, and click Login , or check the Use Windows session authentication check box
(Windows only).
Deploy the ASAv Using the VMware vSphere Web Client
To deploy the ASAv, use the VMware vSphere Web Client (or the vSphere Client) and a template file in the open virtualization format (OVF). You use the Deploy OVF Template wizard in the vSphere Web Client to deploy the Cisco package for the ASAv. The wizard parses the ASAv OVF file, creates the virtual machine on which you will run the ASAv, and installs the package.
Most of the wizard steps are standard for VMware. For additional information about the Deploy OVF Template, see the VMware vSphere Web Client online help.
Before you begin
You must have at least one network configured in vSphere (for management) before you deploy the ASAv.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Download the ASAv ZIP file from Cisco.com, and save it to your PC: http://www.cisco.com/go/asa-software
Note A Cisco.com login and Cisco service contract are required.
In the vSphere Web Client Navigator pane, click vCenter .
Click Hosts and Clusters .
Right-click the data center, cluster, or host where you want to deploy the ASAv, and choose Deploy OVF Template .
The Deploy OVF Template wizard appears.
Follow the wizard screens as directed.
In the Setup networks screen, map a network to each ASAv interface that you want to use.
The networks may not be in alphabetical order. If it is too difficult to find your networks, you can change the networks later from the Edit Settings dialog box. After you deploy, right-click the ASAv instance, and choose Edit Settings to access the Edit Settings dialog box. However that screen does not show the ASAv interface IDs (only Network Adapter
IDs). See the following concordance of Network Adapter IDs and ASAv interface IDs:
Network Adapter ID ASAv Interface ID
Network Adapter 1
Network Adapter 2
Management 0/0
GigabitEthernet 0/0
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Deploy the ASAv Using the VMware vSphere Web Client
Step 7
Step 8
Step 9
Network Adapter ID
Network Adapter 3
Network Adapter 4
Network Adapter 5
Network Adapter 6
Network Adapter 7
Network Adapter 8
Network Adapter 9
Network Adapter 10
ASAv Interface ID
GigabitEthernet 0/1
GigabitEthernet 0/2
GigabitEthernet 0/3
GigabitEthernet 0/4
GigabitEthernet 0/5
GigabitEthernet 0/6
GigabitEthernet 0/7
GigabitEthernet 0/8
You do not need to use all ASAv interfaces; however, the vSphere Web Client requires you to assign a network to all interfaces. For interfaces you do not intend to use, you can simply leave the interface disabled within the ASAv configuration. After you deploy the ASAv, you can optionally return to the vSphere Web Client to delete the extra interfaces from the Edit Settings dialog box. For more information, see the vSphere Web Client online help.
Note For failover/HA deployments, GigabitEthernet 0/8 is preconfigured as the failover interface.
If your network uses an HTTP proxy for Internet access, you must configure the proxy address for smart licensing in the Smart Call Home Settings area. This proxy is also used for Smart Call Home in general.
For failover/HA deployments, in the Customize template screen, configure the following:
• Specify the standby management IP address.
When you configure your interfaces, you must specify an active IP address and a standby IP address on the same network. When the primary unit fails over, the secondary unit assumes the IP addresses and MAC addresses of the primary unit and begins passing traffic. The unit that is now in a standby state takes over the standby IP addresses and MAC addresses. Because network devices see no change in the MAC to IP address pairing, no ARP entries change or time out anywhere on the network.
• Configure the failover link settings in the HA Connection Settings area.
The two units in a failover pair constantly communicate over a failover link to determine the operating status of each unit. GigabitEthernet 0/8 is preconfigured as the failover link. Enter the active and standby IP addresses for the link on the same network.
After you complete the wizard, the vSphere Web Client processes the VM; you can see the “Initialize OVF deployment” status in the Global Information area Recent Tasks pane.
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When it is finished, you see the Deploy OVF Template completion status.
The ASAv VM instance then appears under the specified data center in the Inventory.
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Step 10
Step 11
If the ASAv VM is not yet running, click Power On the virtual machine .
Wait for the ASAv to boot up before you try to connect with ASDM or to the console. When the ASAv starts up for the first time, it reads parameters provided through the OVF file and adds them to the ASAv system configuration. It then automatically restarts the boot process until it is up and running. This double boot process only occurs when you first deploy the ASAv. To view bootup messages, access the ASAv console by clicking the Console tab.
For failover/HA deployments, repeat this procedure to add the secondary unit. See the following guidelines:
• Set the same throughput level as the primary unit.
• Enter the exact same IP address settings as for the primary unit. The bootstrap configurations on both units are identical except for the parameter identifying a unit as primary or secondary.
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Deploy the ASAv Using the VMware vSphere Standalone Client and Day 0 Configuration
What to do next
To successfully register the ASAv with the Cisco Licensing Authority, the ASAv requires Internet access.
You might need to perform additional configuration after deployment to achieve Internet access and successful license registration.
Deploy the ASAv Using the VMware vSphere Standalone Client and Day 0 Configuration
To deploy the ASAv, use the VMware vSphere Client and the open virtualization format (OVF) template file
(asav-vi.ovf for a vCenter deployment or asav-esxi.ovf for a non-vCenter deployment). You use the Deploy
OVF Template wizard in the vSphere Client to deploy the Cisco package for the ASAv. The wizard parses the ASAv OVF file, creates the virtual machine on which you will run the ASAv, and installs the package.
Most of the wizard steps are standard for VMware. For additional information about the Deploy OVF Template wizard, see the VMware vSphere Client online help.
Before you begin
• You must have at least one network configured in vSphere (for management) before you deploy the
ASAv.
• Follow the steps in
Unpack the ASAv Software and Create a Day 0 Configuration File, on page 18
to create the Day 0 configuration.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Launch the VMware vSphere Client and choose File > Deploy OVF Template .
The Deploy OVF Template wizard appears.
Browse to the working directory where you unzipped the asav-vi.ovf file and select it.
The OVF Template details are shown. Proceed through the following screens. You do not have to change any configuration if you choose to use a custom Day 0 configuration file.
A summary of the deployment settings is shown in the last screen. Click Finish to deploy the VM.
Power on the ASAv, open the VMware console, and wait for the second boot.
SSH to the ASAv and complete your desired configuration. If you do not have all the configuration that you wanted in the Day 0 configuration file, open a VMware console and complete the necessary configuration.
The ASAv is now fully operational.
Deploy the ASAv Using the OVF Tool and Day 0 Configuration
This section describes how to deploy the ASAv using the OVF tool, which requires a day 0 configuration file.
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Access the ASAv Console
Before you begin
• The day0.iso file is required when you are deploying the ASAv using the OVF tool. You can use the default empty day0.iso file provided in the ZIP file, or you can use a customized Day 0 configuration file that you generate. See
Unpack the ASAv Software and Create a Day 0 Configuration File, on page
for creating a Day 0 configuration file.
• Make sure the OVF tool is installed on a Linux or Windows PC and that it has connectivity to your target
ESXi server.
Step 1
Step 2
Step 3
Step 4
Verify the OVF tool is installed:
Example: linuxprompt# which ovftool
Create a .cmd file with the desired deployment options:
Example: linuxprompt# cat launch.cmd
ovftool \
--name="asav-941-demo" \
--powerOn \
--deploymentOption=ASAv30 \
--diskMode=thin \
--datastore=datastore1 \
--acceptAllEulas \
--net:Management0-0="Portgroup_Mgmt" \
--net:GigabitEthernet0-1="Portgroup_Inside" \
--net:GigabitEthernet0-0="Portgroup_Outside" \
--prop:HARole=Standalone \ asav-esxi.ovf \ vi://[email protected]/
Execute the cmd file:
Example: linuxprompt# ./launch.cmd
The ASAv is powered on; wait for the second boot.
SSH to the ASAv to complete configuration as needed. If more configuration is required, open the VMware console to the ASAv and apply the necessary configuration.
The ASAv is now fully operational.
Access the ASAv Console
In some cases with ASDM, you may need to use the CLI for troubleshooting. By default, you can access the built-in VMware vSphere console. Alternatively, you can configure a network serial console, which has better capabilities, including copy and paste.
•
Use the VMware vSphere Console
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Use the VMware vSphere Console
•
Configure a Network Serial Console Port
Note If you deploy the ASAv using a Day 0 configuration file, you can include the console serial setting in the configuration file to use the serial port on first boot instead of the virtual VGA console; see
Software and Create a Day 0 Configuration File, on page 18
.
Use the VMware vSphere Console
For initial configuration or troubleshooting, access the CLI from the virtual console provided through the
VMware vSphere Web Client. You can later configure CLI remote access for Telnet or SSH.
Before you begin
For the vSphere Web Client, install the Client Integration Plug-In, which is required for ASAv console access.
Step 1
Step 2
Step 3
Step 4
In the VMware vSphere Web Client, right-click the ASAv instance in the Inventory, and choose Open Console . Or you can click Launch Console on the Summary tab.
Click in the console and press Enter . Note: Press Ctrl + Alt to release the cursor.
If the ASAv is still starting up, you see bootup messages.
When the ASAv starts up for the first time, it reads parameters provided through the OVF file and adds them to the ASAv system configuration. It then automatically restarts the boot process until it is up and running. This double boot process only occurs when you first deploy the ASAv.
Note Until you install a license, throughput is limited to 100 Kbps so that you can perform preliminary connectivity tests. A license is required for regular operation. You also see the following messages repeated on the console until you install a license:
Warning: ASAv platform license state is Unlicensed.
Install ASAv platform license for full functionality.
You see the following prompt: ciscoasa>
This prompt indicates that you are in user EXEC mode. Only basic commands are available from user EXEC mode.
Access privileged EXEC mode:
Example: ciscoasa> enable
The following prompt appears:
Password:
Press the Enter key to continue. By default, the password is blank. If you previously set an enable password, enter it instead of pressing Enter.
The prompt changes to: ciscoasa#
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Configure a Network Serial Console Port
Step 5
All nonconfiguration commands are available in privileged EXEC mode. You can also enter configuration mode from privileged EXEC mode.
To exit privileged mode, enter the disable , exit , or quit command.
Access global configuration mode: ciscoasa# configure terminal
The prompt changes to the following: ciscoasa(config)#
You can begin to configure the ASAv from global configuration mode. To exit global configuration mode, enter the exit , quit , or end command.
Configure a Network Serial Console Port
For a better console experience, you can configure a network serial port singly or attached to a virtual serial port concentrator (vSPC) for console access. See the VMware vSphere documentation for details about each method. On the ASAv, you must send the console output to a serial port instead of to the virtual console. This procedure describes how to enable the serial port console.
Step 1
Step 2
Step 3
Step 4
Configure a network serial port in VMware vSphere. See the VMware vSphere documentation.
On the ASAv, create a file called “use_ttyS0” in the root directory of disk0. This file does not need to have any contents; it just needs to exist at this location: disk0:/use_ttyS0
• From ASDM, you can upload an empty text file by that name using the Tools > File Management dialog box.
• At the vSphere console, you can copy an existing file (any file) in the file system to the new name. For example: ciscoasa(config)# cd coredumpinfo ciscoasa(config)# copy coredump.cfg disk0:/use_ttyS0
Reload the ASAv.
• From ASDM, choose Tools > System Reload .
• At the vSphere console, enter reload .
The ASAv stops sending to the vSphere console, and instead sends to the serial console.
Telnet to the vSphere host IP address and the port number you specified when you added the serial port; or Telnet to the vSPC IP address and port.
Upgrade the vCPU or Throughput License
The ASAv uses a throughput license, which affects the number of vCPUs you can use.
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Upgrade the vCPU or Throughput License
If you want to increase (or decrease) the number of vCPUs for your ASAv, you can request a new license, apply the new license, and change the VM properties in VMware to match the new values.
Note The assigned vCPUs must match the ASAv Virtual CPU license or Throughput license. The RAM must also be sized correctly for the vCPUs. When upgrading or downgrading, be sure to follow this procedure and reconcile the license and vCPUs immediately. The ASAv does not operate properly when there is a persistent mismatch.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Request a new license.
Apply the new license. For failover pairs, apply new licenses to both units.
Do one of the following, depending on whether you use failover:
• Failover—In the vSphere Web Client, power off the standby ASAv. For example, click the ASAv and then click
Power Off the virtual machine , or right-click the ASAv and choose Shut Down Guest OS .
• No Failover—In the vSphere Web Client, power off the ASAv. For example, click the ASAv and then click Power
Off the virtual machine , or right-click the ASAv and choose Shut Down Guest OS .
Click the ASAv and then click Edit Virtual machine settings (or right-click the ASAv and choose Edit Settings ).
The Edit Settings dialog box appears.
Refer to the CPU and memory requirements in
Licensing for the ASAv, on page 1
to determine the correct values for the new vCPU license.
On the Virtual Hardware tab, for the CPU , choose the new value from the drop-down list.
For the Memory , enter the new value for the RAM.
Click OK .
Power on the ASAv. For example, click Power On the Virtual Machine .
For failover pairs: a.
Open a console to the active unit or launch ASDM on the active unit.
b.
After the standby unit finishes starting up, fail over to the standby unit:
• ASDM: Choose Monitoring > Properties > Failover > Status , and click Make Standby .
• CLI: failover active c.
Repeat Steps 3 through 9 for the active unit.
What to do next
See
Licensing for the ASAv, on page 1
for more information.
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Performance Tuning for the ASAv on VMware
Performance Tuning for the ASAv on VMware
Increasing Performance on ESXi Configurations
You can increase the performance for an ASAv in the ESXi environment by tuning the ESXi host CPU configuration settings. The Scheduling Affinity option gives you control over how virtual machine CPUs are distributed across the host's physical cores (and hyperthreads if hyperthreading is enabled). By using this feature, you can assign each virtual machine to processors in the specified affinity set.
See the following VMware documents for more information:
• The Administering CPU Resources chapter of vSphere Resource Management .
• Performance Best Practices for VMware vSphere .
• The vSphere Client online help .
NUMA Guidelines
Non-Uniform Memory Access (NUMA) is a shared memory architecture that describes the placement of main memory modules with respect to processors in a multiprocessor system. When a processor accesses memory that does not lie within its own node (remote memory), data must be transferred over the NUMA connection at a rate that is slower than it would be when accessing local memory.
The x86 server architecture consists of multiple sockets and multiple cores within a socket. Each CPU socket along with its memory and I/O is referred to as a NUMA node. To efficiently read packets from memory, guest applications and associated peripherals (such as the NIC) should reside within the same node.
For optimum ASAv performance:
• The ASAv VM must run on a single numa node. If a single ASAv is deployed so that is runs across 2 sockets, the perfomance will be significantly degraded.
• An 8-core ASAv (
Figure 1: 8-Core NUMA Architecture Example, on page 32
) requires that each socket on the host CPU have a minimum of 8 cores per socket. Consideration must be given to other VMs running on the server.
• The NIC should be on same NUMA node as ASAv VM.
The following figure shows a server with two CPU sockets with each CPU having 18 cores. The 8-core ASAv requires that each socket on the host CPU have a minimum of 8 cores.
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Multiple RX Queues for Receive Side Scaling (RSS)
Figure 1: 8-Core NUMA Architecture Example
Deploy the ASAv Using VMware
More information about using NUMA systems with ESXi can be found in the VMware document vSphere
Resource Management for your VMware ESXi version. To check for more recent editions of this and other relevant documents, see http://www.vmware.com/support/pubs
Multiple RX Queues for Receive Side Scaling (RSS)
The ASAv supports Receive Side Scaling (RSS), which is a technology utilized by network adapters to distribute network receive traffic in parallel to multiple processor cores. For maximum throughput, each vCPU
(core) must have its own NIC RX queue. Note that a typical RA VPN deployment might use a single inside/outside pair of interfaces.
Important You need ASAv Version 9.13(1) or greater to use multiple RX queues.
For an 8-core VM with an inside/outside pair of interfaces, each interface will have 4 RX queues, as shown in
Figure 2: 8-Core ASAv RSS RX Queues, on page 33 .
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Figure 2: 8-Core ASAv RSS RX Queues
Multiple RX Queues for Receive Side Scaling (RSS)
The following table presents the ASAv's vNICs for VMware and the number of supported RX queues. See
#unique_21 unique_21_Connect_42_section_unm_s52_glb for descriptions of the supported vNICs.
Table 8: VMware Recommended NICs/vNICs
NIC Card x710* x520 vNIC Driver i40e i40evf ixgbe-vf ixgbe
Driver Technology
PCI Passthrough
SR-IOV
SR-IOV
PCI Passthrough
Number of RX
Queues
Performance
8 max
4
4
4
PCI Passthrough offers the highest performance of the NICs tested. In passthrough mode the NIC is dedicated to the ASAv and is not an optimal choice for virtual.
SR-IOV with the x710 NIC has lower throughput (~30%) than PCI
Passthrough. i40evf on VMware has a maximum of 4 RX queues per i40evf. 8 RX queues are needed for maximum throughput on a 16 core
VM.
The ixgbe-vf driver (in SR-IOV mode) has performance issues that are under investigation.
The ixgbe driver (in PCI Passthrough mode) has 4 RX queues. Performance is on par with i40evf (SR-IOV).
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SR-IOV Interface Provisioning
NIC Card
N/A
N/A vNIC Driver vmxnet3 e1000
Driver Technology
Para-virtualized
Number of RX
Queues
Performance
8 max
Not recommended by VMware.
Not recommended for ASAv100.
*The ASAv is not compatible with the 1.9.5 i40en host driver for the x710 NIC. Older or newer driver versions will work. See
Identify NIC Drivers and Firmware Versions, on page 34
for information on ESXCLI commands to identify or verify NIC driver and firmware versions.
Identify NIC Drivers and Firmware Versions
If you need to identify or verify your specific firmware and driver version information, it is possible to find that data using ESXCLI commands.
• To get a list of the installed NICs, SSH to the pertinent host and run the esxcli network nic list command. This command should provide you with a record of devices and general information.
• After you have a list of the installed NICs, you can pull detailed configuration information. Run the esxcli network nic get command specifying the name of the NIC necessary: esxcli network nic get –n <nic name>
.
Note General network adapter information can also be viewed from the VMware vSphere Client. The adapter and driver are found under Physical Adapters within the Configure tab.
SR-IOV Interface Provisioning
SR-IOV allows multiple VMs to share a single PCIe network adapter inside a host. SR-IOV defines these functions:
• Physical function (PF)—PFs are full PCIe functions that include the SR-IOV capabilities. These appear as regular static NICs on the host server.
• Virtual function (VF)—VFs are lightweight PCIe functions that help in data transfer. A VF is derived from, and managed through, a PF.
VFs are capable of providing up to 10 Gbps connectivity to ASAv virtual machines within a virtualized operating system framework. This section explains how to configure VFs in a KVM environment. SR-IOV support on the ASAv is explained in
ASAv and SR-IOV Interface Provisioning, on page 9 .
Guidelines and Limitations
Guidelines for SR-IOV Interfaces
VMware vSphere 5.1 and later releases support SR-IOV in an environment with specific configurations only.
Some features of vSphere are not functional when SR-IOV is enabled.
In addition to the system requirements for the ASAv and SR-IOV as described in
Guidelines and Limitations for SR-IOV Interfaces, on page 10 , you should review the
Supported Configurations for Using SR-IOV in
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Check the ESXi Host BIOS the VMware documentation for more information about requirements, supported NICs, availability of features, and upgrade requirements for VMware and SR-IOV.
This section shows various setup and configuration steps for provisioning SR-IOV interfaces on a VMware system. The information in this section was created from devices in a specific lab environment, using VMware
ESXi 6.0 and vSphere Web Client, a Cisco UCS C Series server, and an Intel Ethernet Server Adapter X520
- DA2.
Limitations for SR-IOV Interfaces
When the ASAv is booted, be aware that SR-IOV interfaces can show up in reverse order when compared to the order presented in ESXi. This could cause interface configuration errors that result in a lack of network connectivity for a particular ASAv virtual machine.
Caution It is important that you verify the interface mapping before you begin configuring the SR-IOV network interfaces on the ASAv. This ensures that the network interface configuration will apply to the correct physical
MAC address interface on the VM host.
After the ASAv boots, you can confirm which MAC address maps to which interface. Use the show interface command to see detailed interface information, including the MAC address for an interface. Compare the
MAC address to the results of the show kernel ifconfig command to confirm the correct interface assignment.
Check the ESXi Host BIOS
To deploy the ASAv with SR-IOV interfaces on VMware, virtualization needs to be supported and enabled.
VMware provides several methods of verifying virtualization support, including their online Compatibility
Guide for SR-IOV support as well as a downloadable CPU identification utility that detects whether virtualization is enabled or disabled.
You can also determine if virtualization is enabled in the BIOS by logging into the ESXi host.
Step 1
Step 2
Step 3
Log in to the ESXi Shell using one of the following methods:
• If you have direct access to the host, press Alt+F2 to open the login page on the machine's physical console.
• If you are connecting to the host remotely, use SSH or another remote console connection to start a session on the host.
Enter a user name and password recognized by the host.
Run the following command:
Example: esxcfg-info|grep "\----\HV Support"
The output of the HV Support command indicates the type of hypervisor support available. These are the descriptions for the possible values:
0 - VT/AMD-V indicates that support is not available for this hardware.
1 - VT/AMD-V indicates that VT or AMD-V might be available but it is not supported for this hardware.
2 - VT/AMD-V indicates that VT or AMD-V is available but is currently not enabled in the BIOS.
3 - VT/AMD-V indicates that VT or AMD-V is enabled in the BIOS and can be used.
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Enable SR-IOV on the Host Physical Adapter
Example:
~ # esxcfg-info|grep "\----\HV Support"
|----HV Support...........................3
The value 3 indicates the virtualization is supported and enabled.
What to do next
• Enable SR-IOV on the host physical adapter.
Enable SR-IOV on the Host Physical Adapter
Use the vSphere Web Client to enable SR-IOV and set the number of virtual functions on your host. You cannot connect virtual machines to virtual functions until you do so.
Before you begin
• Make sure you have an SR-IOV-compatible network interface card (NIC) installed; see
Supported NICs for SR-IOV, on page 11 .
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
In the vSphere Web Client, navigate to the ESXi host where you want to enable SR-IOV.
On the Manage tab, click Networking and choose Physical adapters .
You can look at the SR-IOV property to see whether a physical adapter supports SR-IOV.
Select the physical adapter and click Edit adapter settings .
Under SR-IOV, select Enabled from the Status drop-down menu.
In the Number of virtual functions text box, type the number of virtual functions that you want to configure for the adapter.
Note For ASAv50, we recommend that you DO NOT use more than 1 VF per interface. Performance degradation is likely to occur if you share the physical interface with multiple virtual functions.
Click OK .
Restart the ESXi host.
The virtual functions become active on the NIC port represented by the physical adapter entry. They appear in the PCI
Devices list in the Settings tab for the host.
What to do next
• Create a standard vSwitch to manage the SR-IOV functions and configurations.
Create a vSphere Switch
Create a vSphere switch to manage the SR-IOV interfaces.
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Create a vSphere Switch
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
In the vSphere Web Client, navigate to the ESXi host.
Under Manage select Networking , and then select Virtual switches .
Click the Add host networking icon, which is the green globe icon with the plus (+) sign.
Select a Virtual Machine Port Group for a Standard Switch connection type and click Next .
Choose New standard switch and click Next .
Add physical network adapters to the new standard switch.
a) Under Assigned adapters, click the green plus (+) sign to Add adapters .
b) Select the corresponding network interface for SR-IOV from the list. For example, Intel(R) 82599 10 Gigabit Dual
Port Network Connection.
c) From the Failover order group drop-down menu, select from the Active adapters .
d) Click OK .
Enter a Network label for the SR-IOV vSwitch and click Next .
Review your selections on the Ready to complete page, then click Finish .
Figure 3: New vSwitch with an SR-IOV Interface attached
What to do next
• Review the compatibility level of your virtual machine.
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Upgrade the Compatibility Level for Virtual Machines
Upgrade the Compatibility Level for Virtual Machines
The compatibility level determines the virtual hardware available to the virtual machine, which corresponds to the physical hardware available on the host machine. The ASAv virtual machine needs to be at Hardware
Level 10 or higher. This will expose the SR-IOV passthough feature to the ASAv. This procedure upgrades the ASAv to the latest supported virtual hardware version immediately.
For information about virtual machine hardware versions and compatibility, see the vSphere Virtual Machine
Administration documentation.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Log in to the vCenter Server from the vSphere Web Client.
Locate the ASAv virtual machine you wish to modify.
a) Select a datacenter, folder, cluster, resource pool, or host and click the Related Objects tab.
b) Click Virtual Machines and select the ASAv virtual machine from the list.
Power off the selected virtual machine.
Right-click on the ASAv and select Actions > All vCenter Actions > Compatibility > Upgrade VM Compatibility .
Click Yes to confirm the upgrade.
Choose the ESXi 5.5 and later option for the virtual machines compatiblity.
(Optional) Select Only upgrade after normal guest OS shutdown .
The selected virtual machine is upgraded to the corresponding hardware version for the Compatibility setting that you chose, and the new hardware version is updated in the Summary tab of the virtual machine.
What to do next
• Associate the ASAv with a virtual function through an SR-IOV passthrough network adapter.
Assign the SR-IOV NIC to the ASAv
To ensure that the ASAv virtual machine and the physical NIC can exchange data, you must associate the
ASAv with one or more virtual functions as SR-IOV passthrough network adapters. The following procedure explains how to assign the SR-IOV NIC to the ASAv virtual machine using the vSphere Web Client.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Log in to the vCenter Server from the vSphere Web Client.
Locate the ASAv virtual machine you wish to modify.
a) Select a datacenter, folder, cluster, resource pool, or host and click the Related Objects tab.
b) Click Virtual Machines and select the ASAv virtual machine from the list.
On the Manage tab of the virtual machine, select Settings > VM Hardware .
Click Edit and choose the Virtual Hardware tab.
From the New device drop-down menu, select Network and click Add .
A New Network interface appears.
Expand the New Network section and select an available SRIOV option.
From the Adapter Type drop-down menu, select SR-IOV passthrough .
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Assign the SR-IOV NIC to the ASAv
Step 8
Step 9
From the Physical function drop-down menu, select the physical adapter that corresponds to the passthrough virtual machine adapter.
Power on the virtual machine.
When you power on the virtual machine, the ESXi host selects a free virtual function from the physical adapter and maps it to the SR-IOV passthrough adapter. The host validates all properties of the virtual machine adapter and the underlying virtual function.
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C H A P T E R
3
Deploy the ASAv Using KVM
You can deploy the ASAv on any server class x86 CPU device that is capable of running the Kernel-based
Virtual Machine (KVM).
•
ASAv on KVM Guidelines and Limitations, on page 41
•
About ASAv Deployment Using KVM, on page 42
•
Prerequisites for the ASAv and KVM, on page 42
•
Prepare the Day 0 Configuration File, on page 43
•
Prepare the Virtual Bridge XML Files, on page 45
•
•
Hotplug Interface Provisioning, on page 47
•
Performance Tuning for the ASAv on KVM, on page 49
ASAv on KVM Guidelines and Limitations
The specific hardware used for ASAv deployments can vary, depending on the number of instances deployed and usage requirements. Each virtual appliance you create requires a minimum resource allocation—memory, number of CPUs, and disk space—on the host machine.
Review the following guidelines and limitations before you deploy the ASAv.
ASAv on KVM System Requirements
Make sure to conform to the specifications below to ensure optimal performance. The ASAv has the following requirements:
• The host CPU must be a server class x86-based Intel or AMD CPU with virtualization extension.
For example, ASAv performance test labs use as minimum the following: Cisco Unified Computing
System ™ (Cisco UCS ® ) C series M4 server with the Intel ® Xeon ® CPU E5-2690v4 processors running at 2.6GHz.
CPU Pinning
CPU pinning is required for the ASAv to function in a KVM environment; see
.
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About ASAv Deployment Using KVM
Failover for High Availability Guidelines
For failover deployments, make sure that the standby unit has the same model license; for example, both units should be ASAv30s.
Important When creating a high availability pair using ASAv, it is necessary to add the data interfaces to each ASAv in the same order. If the exact same interfaces are added to each ASAv, but in different order, errors may be presented at the ASAv console. Failover functionality may also be affected.
About ASAv Deployment Using KVM
The following figure shows a sample network topology with ASAv and KVM. The procedures described in this chapter are based on the sample topology. The ASAv acts as the firewall between the inside and outside networks. A separate management network is also configured.
Figure 4: Sample ASAv Deployment Using KVM
Prerequisites for the ASAv and KVM
• Download the ASAv qcow2 file from Cisco.com and put it on your Linux host: http://www.cisco.com/go/asa-software
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Prepare the Day 0 Configuration File
Note A Cisco.com login and Cisco service contract are required.
• For the purpose of the sample deployment in this document, we are assuming you are using Ubuntu 14.04
LTS. Install the following packages on top of the Ubuntu 14.04 LTS host:
• qemu-kvm
• libvirt-bin
• bridge-utils
• virt-manager
• virtinst
• virsh tools
• genisoimage
• Performance is affected by the host and its configuration. You can maximize the throughput of the ASAv on KVM by tuning your host. For generic host-tuning concepts, see NFV Delivers Packet Processing
Performance with Intel .
• Useful optimizations for Ubuntu 14.04 include the following:
• macvtap—High performance Linux bridge; you can use macvtap instead of a Linux bridge. Note that you must configure specific settings to use macvtap instead of the Linux bridge.
• Transparent Huge Pages—Increases memory page size and is on by default in Ubuntu 14.04.
Hyperthread disabled—Reduces two vCPUs to one single core.
• txqueuelength—Increases the default txqueuelength to 4000 packets and reduces drop rate.
• pinning—Pins qemu and vhost processes to specific CPU cores; under certain conditions, pinning is a significant boost to performance.
• For information on optimizing a RHEL-based distribution, see Red Hat Enterprise Linux 7 Virtualization
Tuning and Optimization Guide .
• For ASA software and ASAv hypervisor compatibility, see Cisco ASA Compatibility .
Prepare the Day 0 Configuration File
You can prepare a Day 0 configuration file before you launch the ASAv. This file is a text file that contains the ASAv configuration applied when the ASAv is launched. This initial configuration is placed into a text file named “day0-config” in a working directory you chose, and is manipulated into a day0.iso file that is mounted and read on first boot. At the minimum, the Day 0 configuration file must contain commands to activate the management interface and set up the SSH server for public key authentication, but it can also contain a complete ASA configuration.
The day0.iso file (either your custom day0.iso or the default day0.iso) must be available during first boot:
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Prepare the Day 0 Configuration File
• To automatically license the ASAv during initial deployment, place the Smart Licensing Identity (ID)
Token that you downloaded from the Cisco Smart Software Manager in a text file named ‘idtoken’ in the same directory as the Day 0 configuration file.
• If you want to access and configure the ASAv from the serial port on the hypervisor instead of the virtual
VGA console, you should include the console serial setting in the Day 0 configuration file to use the serial port on first boot.
• If you want to deploy the ASAv in transparent mode, you must use a known running ASA config file in transparent mode as the Day 0 configuration file. This does not apply to a Day 0 configuration file for a routed firewall.
Note We are using Linux in this example, but there are similar utilities for Windows.
Step 1
Step 2
Enter the CLI configuration for the ASAv in a text file called “day0-config.” Add interface configurations for the three interfaces and any other configuration you want.
The fist line should begin with the ASA version. The day0-config should be a valid ASA configuration. The best way to generate the day0-config is to copy the relevant parts of a running config from an existing ASA or ASAv. The order of the lines in the day0-config is important and should match the order seen in an existing show running-config command output.
Example:
ASA Version 9.4.1
!
console serial interface management0/0 nameif management security-level 100 ip address 192.168.1.2 255.255.255.0
no shutdown interface gigabitethernet0/0 nameif inside security-level 100 ip address 10.1.1.2 255.255.255.0
no shutdown interface gigabitethernet0/1 nameif outside security-level 0 ip address 198.51.100.2 255.255.255.0
no shutdown http server enable http 192.168.1.0 255.255.255.0 management crypto key generate rsa modulus 1024 username AdminUser password paSSw0rd ssh 192.168.1.0 255.255.255.0 management aaa authentication ssh console LOCAL
(Optional) For automated licensing during initial ASAv deployment, make sure the following information is in the day0-config file:
• Management interface IP address
• (Optional) HTTP proxy to use for Smart Licensing
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Prepare the Virtual Bridge XML Files
Step 3
Step 4
Step 5
• A route command that enables connectivity to the HTTP proxy (if specified) or to tools.cisco.com
• A DNS server that resolves tools.cisco.com to an IP address
• Smart Licensing configuration specifying the ASAv license you are requesting
• (Optional) A unique host name to make the ASAv easier to find in CSSM
(Optional) Download the Smart License identity token file issued by the Cisco Smart Software Manager to your computer, copy the ID token from the download file, and put it a text file named ‘idtoken’ that only contains the ID token.
Generate the virtual CD-ROM by converting the text file to an ISO file:
Example: stack@user-ubuntu:-/KvmAsa$ sudo genisoimage -r -o day0.iso day0-config idtoken
I: input-charset not specified, using utf-8 (detected in locale settings)
Total translation table size: 0
Total rockridge attributes bytes: 252
Total directory bytes: 0
Path table size (byptes): 10
Max brk space used 0
176 extents written (0 MB) stack@user-ubuntu:-/KvmAsa$
The Identity Token automatically registers the ASAv with the Smart Licensing server.
Repeat Steps 1 through 5 to create separate default configuration files with the appropriate IP addresses for each ASAv you want to deploy.
Prepare the Virtual Bridge XML Files
You need to set up virtual networks that connect the ASAv guests to the KVM host and that connect the guests to each other.
Note This procedure does not establish connectivity to the external world outside the KVM host.
Prepare the virtual bridge XML files on the KVM host. For the sample virtual network topology described in
virbr2.xml, and virbr3.xml (you must use these three filenames; for example, virbr0 is not allowed because it already exists). Each file has the information needed to set up the virtual bridges. You must give the virtual bridge a name and a unique MAC address. Providing an IP address is optional.
Step 1 Create three virtual network bridge XML files. For example, virbr1.xml, virbr2.xml, and virbr3.xml:
Example:
<network>
<name>virbr1</name>
<bridge name='virbr1' stp='on' delay='0' />
<mac address='52:54:00:05:6e:00' />
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Step 2
Step 3
Step 4
Step 5
<ip address='192.168.1.10' netmask='255.255.255.0' />
</network>
Example:
<network>
<name>virbr2</name>
<bridge name='virbr2' stp='on' delay='0' />
<mac address='52:54:00:05:6e:01' />
<ip address='10.1.1.10' netmask='255.255.255.0' />
</network>
Example:
<network>
<name>virbr3</name>
<bridge name='virbr3' stp='on' delay='0' />
<mac address='52:54:00:05:6e:02' />
<ip address='198.51.100.10' netmask='255.255.255.0' />
</network>
Create a script that contains the following (in our example, we name the script virt_network_setup.sh): virsh net-create virbr1.xml
virsh net-create virbr2.xml
virsh net-create virbr3.xml
Run this script to set up the virtual network. The script brings up the virtual networks. The networks stay up as long as the KVM host is running.
stack@user-ubuntu:-/KvmAsa$ virt_network_setup.sh
Note If you reload the Linux host, you must rerun the virt_network_setup.sh script. It does not persist over reboots.
Verify that the virtual networks were created: stack@user-ubuntu:-/KvmAsa$ brctl show bridge name bridge id STP enabled Interfaces virbr0 8000.0000000000000 yes virbr1 8000.5254000056eed yes virb1-nic virbr2 8000.5254000056eee yes virb2-nic virbr3 8000.5254000056eec yes virb3-nic stack@user-ubuntu:-/KvmAsa$
Display the IP address assigned to the virbr1 bridge. This is the IP address that you assigned in the XML file.
stack@user-ubuntu:-/KvmAsa$ ip address show virbr1
S: virbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN link/ether 52:54:00:05:6e:00 brd ff:ff:ff:ff:ff:ff inet 192.168.1.10/24 brd 192.168.1.255 scope global virbr1 valid_lft forever preferred_lft forever
Launch the ASAv
Use a virt-install based deployment script to launch the ASAv.
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Hotplug Interface Provisioning
Step 1
Step 2
Create a virt-install script called “virt_install_asav.sh.”
The name of the ASAv virtual machine must be unique across all other VMs on this KVM host.
The ASAv supports up to 10 networks. This example uses three networks. The order of the network bridge clauses is important. The first one listed is always the management interface of the ASAv (Management 0/0), the second one listed is GigabitEthernet 0/0 of the ASAv, and the third one listed is GigabitEthernet 0/1 of the ASAv, and so on up through
GigabitEthernet 0/8. The virtual NIC must be Virtio.
Example: virt-install \
--connect=qemu:///system \
--network network=default,model=virtio \
--network network=default,model=virtio \
--network network=default,model=virtio \
--name=asav \
--cpu host \
--arch=x86_64 \
--machine=pc-1.0 \
--vcpus=1 \
--ram=2048 \
--os-type=linux \
--virt-type=kvm \
--import \
--disk path=/home/kvmperf/Images/desmo.qcow2,format=qcow2,device=disk,bus=virtio,cache=none \
--disk path=/home/kvmperf/asav_day0.iso,format=iso,device=cdrom \
--console pty,target_type=virtio \
--serial tcp,host=127.0.0.1:4554,mode=bind,protocol=telnet
Run the virt_install script:
Example: stack@user-ubuntu:-/KvmAsa$ ./virt_install_asav.sh
Starting install...
Creating domain...
A window appears displaying the console of the VM. You can see that the VM is booting. It takes a few minutes for the
VM to boot. Once the VM stops booting you can issue CLI commands from the console screen.
Hotplug Interface Provisioning
You can add and remove interfaces dynamically without the need to stop and restart the ASAv. When you add a new interface to the ASAv virtual machine, the ASAv should be able to detect and provision it as a regular interface. Similarly, when you remove an existing interface via hotplug provisioning, the ASAv should remove the interface and release any resource associated with it.
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Guidelines and Limitations
Guidelines and Limitations
Interface Mapping and Numbering
• When you add a hotplug interface, its interface number is the number of the current last interface plus one.
• When you remove a hotplug interface, a gap in the interface numbering is created, unless the interface you removed is the last one.
• When a gap exists in the interface numbering, the next hotplug-provisioned interface will fill that gap.
Failover
• When you use a hotplug interface as a failover link, the link must be provisioned on both units designated as the failover ASAv pair.
• You first add a hotplug interface to the active ASAv in the hypervisor, then add a hotplug interface to the standby ASAv in the hypervisor.
• You configure the newly added failover interface in the active ASAv; the configuration will be synchronized to the standby unit.
• You enable failover on the primary unit.
• When you remove a failover link, you first remove the failover configuration on the active ASAv.
• You remove the failover interface from the active ASAv in the hypervisor.
• Next, you immediately remove the corresponding interface from the standby ASAv in the hypervisor.
Limitations and Restrictions
• Hotplug interface provisioning is limited to Virtio virtual NICs.
• The maximum number of interfaces supported is 10. You will receive an error message if you attempt to add more than 10 interfaces.
• You cannot open the interface card (media_ethernet/port/id/10).
• Hotplug interface provisioning requires ACPI. Do not include the
--noacpi flag in your virt-install script.
Hotplug a Network Interface
You can use the virsh command line to add and remove interfaces in the KVM hypervisor.
Step 1 Open a virsh command line session:
Example:
[root@asav-kvmterm ~]# virsh
Welcome to virsh, the virtualization interactive terminal.
Type: ‘help’ for help with commands
‘quit’ to quit
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Performance Tuning for the ASAv on KVM
Step 2
Step 3
Use the attach-interface command to add an interface.
attach-interface { --domain domain --type type --source source --model model --mac mac --live }
The --domain can be specified as a short integer, a name, or a full UUID. The --type parameter can be either network to indicate a physical network device or bridge to indicate a bridge to a device. The --source parameter indicates the type of connection. The --model parameter indicates the virtial NIC type. The --mac parameter specifies the MAC address of the network interface. The --live parameter indicates that the command affects the running domain.
Note See the official virsh documentation for the complete description of available options.
Example: virsh # attach-interface --domain asav-network --type bridge --source br_hpi --model virtio --mac
52:55:04:4b:59:2f --live
Note Use the interface configuration mode on the ASAv to configure and enable the interface for transmitting and receiving traffic; see the Basic Interface Configuration chapter of the Cisco ASA Series General Operations
CLI Configuration Guide for more information.
Use the detach-interface command to remove an interface.
detach-interface { --domain domain --type type --mac mac --live }
Note See the official virsh documentation for the complete description of available options.
Example: virsh # detach-interface --domain asav-network --type bridge --mac 52:55:04:4b:59:2f --live
Performance Tuning for the ASAv on KVM
Increasing Performance on KVM Configurations
You can increase the performance for an ASAv in the KVM environment by changing settings on the KVM host. These settings are independent of the configuration settings on the host server. This option is available in Red Hat Enterprise Linux 7.0 KVM.
You can improve performance on KVM configurations by enabling CPU pinning.
Enable CPU Pinning
ASAv requires that you use the KVM CPU affinity option to increase the performance of the ASAv in KVM environments. Processor affinity, or CPU pinning, enables the binding and unbinding of a process or a thread to a central processing unit (CPU) or a range of CPUs, so that the process or thread will execute only on the designated CPU or CPUs rather than any CPU.
Configure host aggregates to deploy instances that use CPU pinning on different hosts from instances that do not, to avoid unpinned instances using the resourcing requirements of pinned instances.
Attention Do not deploy instances with NUMA topology on the same hosts as instances that do not have NUMA topology.
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NUMA Guidelines
To use this option, configure CPU pinning on the KVM host.
Step 1
Step 2
Step 3
In the KVM host environment, verify the host topology to find out how many vCPUs are available for pinning:
Example: virsh nodeinfo
Verify the available vCPU numbers:
Example: virsh capabilities
Pin the vCPUs to sets of processor cores:
Example: virsh vcpupin <vm-name> <vcpu-number> <host-core-number>
The virsh vcpupin command must be executed for each vCPU on your ASAv. The following example shows the KVM commands needed if you have an ASAv configuration with four vCPUs and the host has eight cores: virsh vcpupin asav 0 2 virsh vcpupin asav 1 3 virsh vcpupin asav 2 4 virsh vcpupin asav 3 5
The host core number can be any number from 0 to 7. For more information, see the KVM documentation.
Note When configuring CPU pinning, carefully consider the CPU topology of the host server. If using a server configured with multiple cores, do not configure CPU pinning across multiple sockets.
The downside of improving performance on KVM configuration is that it requires dedicated system resources.
NUMA Guidelines
Non-Uniform Memory Access (NUMA) is a shared memory architecture that describes the placement of main memory modules with respect to processors in a multiprocessor system. When a processor accesses memory that does not lie within its own node (remote memory), data must be transferred over the NUMA connection at a rate that is slower than it would be when accessing local memory.
The x86 server architecture consists of multiple sockets and multiple cores within a socket. Each CPU socket along with its memory and I/O is referred to as a NUMA node. To efficiently read packets from memory, guest applications and associated peripherals (such as the NIC) should reside within the same node.
For optimum ASAv performance:
• The ASAv VM must run on a single numa node. If a single ASAv is deployed so that is runs across 2 sockets, the perfomance will be significantly degraded.
• An 8-core ASAv (
Figure 5: 8-Core ASAv NUMA Architecture Example, on page 51 ) requires that each
socket on the host CPU have a minimum of 8 cores per socket. Consideration must be given to other
VMs running on the server.
• The NIC should be on same NUMA node as ASAv VM.
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NUMA Guidelines
The following figure shows a server with two CPU sockets with each CPU having 18 cores. The 8-core ASAv requires that each socket on the host CPU have a minimum of 8 cores.
Figure 5: 8-Core ASAv NUMA Architecture Example
NUMA Optimization
Optimally, the ASAv VM should run on the same numa node that the NICs are running on. To do this:
1.
Determine which node the NICs are on by using "lstopo" to show a diagram of the nodes. Locate the NICs and take note to which node they are attached.
2.
At the KVM Host, use virsh list to find the ASAv.
3.
Edit the VM by: virsh edit <VM Number>
.
4.
Align ASAv on the chosen node. The following examples assume 18-core nodes.
Align onto Node 0:
<vcpu placement='static' cpuset='0-17'>16</vcpu>
<numatune>
<memory mode='strict' nodeset='0'/>
</numatune>
Align onto Node 1:
<vcpu placement='static' cpuset='18-35'>16</vcpu>
<numatune>
<memory mode='strict' nodeset='1'/>
</numatune>
5.
Save the .xml change and power cycle the ASAv VM.
6.
To ensure your VM is running on the desired node, perform a ps aux | grep <name of your ASAv VM> to get the process ID.
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Multiple RX Queues for Receive Side Scaling (RSS)
7.
Run sudo numastat -c <ASAv VM Process ID> to see if the ASAv VM is properly aligned.
More information about using NUMA tuning with KVM can be found in the RedHat document 9.3. libvirt
NUMA Tuning .
Multiple RX Queues for Receive Side Scaling (RSS)
The ASAv supports Receive Side Scaling (RSS), which is a technology utilized by network adapters to distribute network receive traffic in parallel to multiple processor cores. For maximum throughput, each vCPU
(core) must have its own NIC RX queue. Note that a typical RA VPN deployment might use a single inside/outside pair of interfaces.
Important You need ASAv Version 9.13(1) or greater to use multiple RX queues. For KVM, the libvirt version needs to be a minimum of 1.0.6.
For an 8-core VM with an inside/outside pair of interfaces, each interface will have 4 RX queues, as shown in
Figure 6: 8-Core ASAv RSS RX Queues, on page 52 .
Figure 6: 8-Core ASAv RSS RX Queues
The following table presents the ASAv's vNICs for KVM and the number of supported RX queues. See
#unique_44 unique_44_Connect_42_section_pht_vfh_glb for descriptions of the supported vNICs.
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VPN Optimization
Table 9: KVM Recommended NICs/vNICs
NIC Card vNIC Driver Driver Technology x710 x520
N/A i40e i40evf ixgbe ixgbe-vf virtio
PCI Passthrough
SR-IOV
PCI Passthrough
SR-IOV
Para-virtualized
4
4
Number of RX
Queues
Performance
8 maximum
8
8 maximum
PCI Passthrough and SR-IOV modes for the x710 offer the best performance. SR-IOV is typically preferred for virtual deployments because the NIC can be shared across multiple VMs.
The x520 NIC performs 10 to 30% lower than the x710. PCI Passthrough and SR-IOV modes for the x520 offer similar performance. SR-IOV is typically preferred for virtual deployments because the NIC can be shared across multiple VMs.
Not recommended for ASAv100.
For other deployments, see
Multiqueue Support for Virtio on
.
Enable Multiqueue Support for Virtio on KVM
The following example shows to configure the number of Virtio NIC RX queues to 4 using virsh to edit the libvirt xml:
<interface type='bridge'>
<mac address='52:54:00:43:6e:3f'/>
<source bridge='clients'/>
<model type='virtio'/>
<driver name='vhost' queues='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</interface>
Important The libvirt version needs to be a minimum of 1.0.6 to support multiple RX queues.
VPN Optimization
These are some additional considerations for optimizing VPN performance with the ASAv.
• IPSec has higher throughput than DTLS.
• Cipher - GCM has about 2x the throughput of CBC.
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SR-IOV Interface Provisioning
SR-IOV Interface Provisioning
SR-IOV allows multiple VMs to share a single PCIe network adapter inside a host. SR-IOV defines these functions:
• Physical function (PF)—PFs are full PCIe functions that include the SR-IOV capabilities. These appear as regular static NICs on the host server.
• Virtual function (VF)—VFs are lightweight PCIe functions that help in data transfer. A VF is derived from, and managed through, a PF.
VFs are capable of providing up to 10 Gbps connectivity to ASAv virtual machines within a virtualized operating system framework. This section explains how to configure VFs in a KVM environment. SR-IOV support on the ASAv is explained in
ASAv and SR-IOV Interface Provisioning, on page 9 .
Requirements for SR-IOV Interface Provisioning
If you have a physical NIC that supports SR-IOV, you can attach SR-IOV-enabled VFs, or Virtual NICs
(vNICs), to the ASAv instance. SR-IOV also requires support in the BIOS as well as in the operating system instance or hypervisor that is running on the hardware. The following is a list of general guidelines for SR-IOV interface provisioning for the ASAv running in a KVM environment:
• You need an SR-IOV-capable physical NIC in the host server; see
Guidelines and Limitations for SR-IOV
• You need virtualization enabled in the BIOS on your host server. See your vendor documentation for details.
• You need IOMMU global support for SR-IOV enabled in the BIOS on your host server. See your hardware vendor documentation for details.
Modify the KVM Host BIOS and Host OS
This section shows various setup and configuration steps for provisioning SR-IOV interfaces on a KVM system. The information in this section was created from devices in a specific lab environment, using Ubuntu
14.04 on a Cisco UCS C Series server with an Intel Ethernet Server Adapter X520 - DA2.
Before you begin
• Make sure you have an SR-IOV-compatible network interface card (NIC) installed.
• Make sure that the Intel Virtualization Technology (VT-x) and VT-d features are enabled.
Note Some system manufacturers disable these extensions by default. We recommend that you verify the process with the vendor documentation because different systems have different methods to access and change BIOS settings.
• Make sure all Linux KVM modules, libraries, user tools, and utilities have been installed during the operation system installation; see
Prerequisites for the ASAv and KVM, on page 42 .
• Make sure that the physical interface is in the UP state. Verify with ifconfig < ethname >.
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Modify the KVM Host BIOS and Host OS
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Log in to your system using the “root” user account and password.
Verify that Intel VT-d is enabled.
Example: kvmuser@kvm-host: /$ dmesg | grep -e DMAR -e IOMMU
[
[
0.000000] ACPI: DMAR 0x000000006F9A4C68 000140 (v01 Cisco0 CiscoUCS 00000001 INTL 20091013)
0.000000] DMAR: IOMMU enabled
The last line indicates that VT-d is enabled.
Activate Intel VT-d in the kernel by appending the intel_iommu=on parameter to the GRUB_CMDLINE_LINUX entry in the /etc/default/grub configuration file.
Example:
# vi /etc/default/grub
...
GRUB_CMDLINE_LINUX="nofb splash=quiet console=tty0 ... intel_iommu=on"
...
Note If you are using an AMD processor, append amd_iommu=on to the boot parameters instead.
Reboot the server for the iommu change to take effect.
Example:
> shutdown -r now
Create VFs by writing an appropriate value to the sriov_numvfs parameter via the sysfs interface using the following format:
#echo n > /sys/class/net/device name/device/sriov_numvfs
To ensure that the desired number of VFs are created each time the server is power-cycled, you append the above command to the rc.local
file, which is located in the /etc/rc.d/ directory. The Linux OS executes the rc.local
script at the end of the boot process.
For example, the following shows the creation of one VF per port. The interfaces for your particular setup will vary.
Example: echo '1' > /sys/class/net/eth4/device/sriov_numvfs echo '1' > /sys/class/net/eth5/device/sriov_numvfs echo '1' > /sys/class/net/eth6/device/sriov_numvfs echo '1' > /sys/class/net/eth7/device/sriov_numvfs
Reboot the server.
Example:
> shutdown -r now
Verify that the VFs have been created using lspci .
Example:
> lspci | grep -i "Virtual Function" kvmuser@kvm-racetrack:~$ lspci | grep -i "Virtual Function"
0a:10.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
0a:10.1 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
0a:10.2 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
0a:10.3 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
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Assign PCI Devices to the ASAv
Note You will see additional interfaces using the ifconfig command.
Assign PCI Devices to the ASAv
Once you create VFs, you can add them to the ASAv just as you would add any PCI device. The following example explains how to add an Ethernet VF controller to an ASAv using the graphical virt-manager tool.
Step 1 Open the ASAv click the Add Hardware button to add a new device to the virtual machine.
Figure 7: Add Hardware
Step 2 Click PCI Host Device from the Hardware list in the left pane.
The list of PCI devices, including VFs, appears in the center pane.
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Figure 8: List of Virtual Functions
Assign PCI Devices to the ASAv
Step 3 Select one of the available Virtual Functions and click Finish .
The PCI Device shows up in the Hardware List; note the description of the device as Ethernet Controller Virtual Function.
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Figure 9: Virtual Function added
Deploy the ASAv Using KVM
What to do next
• Use the show interface command from the ASAv command line to verify newly configured interfaces.
• Use the interface configuration mode on the ASAv to configure and enable the interface for transmitting and receiving traffic; see the Basic Interface Configuration chapter of the Cisco ASA Series General
Operations CLI Configuration Guide for more information.
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4
Deploy the ASAv On the AWS Cloud
You can deploy the ASAv on the Amazon Web Services (AWS) cloud.
•
About ASAv Deployment On the AWS Cloud, on page 59
•
Prerequisites for the ASAv and AWS, on page 60
•
Guidelines and Limitations for the ASAv and AWS, on page 60
•
Configuration Migration and SSH Authentication, on page 61
•
Sample Network Topology for ASAv on AWS, on page 62
•
Deploy the ASAv on AWS, on page 63
About ASAv Deployment On the AWS Cloud
The Cisco Adaptive Security Virtual Appliance (ASAv) runs the same software as physical Cisco ASAs to deliver proven security functionality in a virtual form factor. The ASAv can be deployed in the public AWS cloud. It can then be configured to protect virtual and physical data center workloads that expand, contract, or shift their location over time.
The ASAv support the following AWS instance types.
Table 10: AWS Supported Instance Types
Instance c3.large
c4.large
m4.large
Attributes
• 2 vCPUs
• 3.75 GB
• 2 data interfaces
• 1 management interface
ASAv Model Support
• ASAv10
• ASAv30
Notes
We do not recommend the
ASAv30 on large instances due to resource underprovisioning.
c3.xlarge
c4.xlarge
m4.xlarge
• 4 vCPUs
• 7.5 GB
• 3 data interfaces
• 1 management interface
• ASAv30 Only the ASAv30 is supported on xlarge instances.
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Prerequisites for the ASAv and AWS
You create an account on AWS, set up the ASAv using the AWS Wizard, and chose an Amazon Machine
Image (AMI). The AMI is a template that contains the software configuration needed to launch your instance.
Important The AMI images are not available for download outside of the AWS environment.
Prerequisites for the ASAv and AWS
• Create an account on aws.amazon.com
.
• License the ASAv. Until you license the ASAv, it will run in degraded mode, which allows only 100 connections and throughput of 100 Kbps. See
Licensing for the ASAv, on page 1 .
• Interface requirements:
• Management interface
• Inside and outside interfaces
• (Optional) Additional subnet (DMZ)
• Communications paths:
• Management interface—Used to connect the ASAv to the ASDM; can’t be used for through traffic.
• Inside interface (required)—Used to connect the ASAv to inside hosts.
• Outside interface (required)—Used to connect the ASAv to the public network.
• DMZ interface (optional)—Used to connect the ASAv to the DMZ network when using the c3.xlarge
interface.
• For ASAv system requirements, see Cisco ASA Compatibility .
Guidelines and Limitations for the ASAv and AWS
Supported Features
The ASAv on AWS supports the following features:
• Support for Amazon EC2 C5 instances, the next generation of the Amazon EC2 Compute Optimized instance family.
• Deployment in the Virtual Private Cloud (VPC)
• Enhanced networking (SR-IOV) where available
• Deployment from Amazon Marketplace
• Maximum of four vCPUs per instance
• User deployment of L3 networks
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• Routed mode (default)
Unsupported Features
The ASAv on AWS does not support the following:
• Console access (management is performed using SSH or ASDM over network interfaces)
• IPv6
• VLAN
• Promiscuous mode (no sniffing or transparent mode firewall support)
• Multiple context mode
• Clustering
• ASAv native HA
• EtherChannel is only supported on direct physical interfaces
• VM import/export
• Amazon Cloudwatch
• Hypervisor agnostic packaging
• VMware ESXi
• Broadcast/multicast messages
These messages are not propagated within AWS so routing protocols that require broadcast/multicast do not function as expected in AWS. VXLAN can operate only with static peers.
• Gratuitous/unsolicited ARPs
These ARPS are not accepted within AWS so NAT configurations that require gratuitous ARPs or unsolicited ARPs do not function as expected.
Configuration Migration and SSH Authentication
Upgrade impact when using SSH public key authentication—Due to updates to SSH authentication, additional configuration is required to enable SSH public key authentication; as a result, existing SSH configurations using public key authentication no longer work after upgrading. Public key authentication is the default for the ASAv on Amazon Web Services (AWS), so AWS users will see this issue. To avoid loss of SSH connectivity, you can update your configuration before you upgrade. Or you can use ASDM after you upgrade
(if you enabled ASDM access) to fix the configuration.
The following is a sample original configuration for a username "admin": username admin nopassword privilege 15 username admin attributes ssh authentication publickey 55:06:47:eb:13:75:fc:5c:a8:c1:2c:bb:
07:80:3a:fc:d9:08:a9:1f:34:76:31:ed:ab:bd:3a:9e:03:14:1e:1b hashed
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Sample Network Topology for ASAv on AWS
To use the ssh authentication command, before you upgrade, enter the following commands: aaa authentication ssh console LOCAL username admin password <password> privilege 15
We recommend setting a password for the username as opposed to keeping the nopassword keyword, if present. The nopassword keyword means that any password can be entered, not that no password can be entered. Prior to 9.6(2), the aaa command was not required for SSH public key authentication, so the nopassword keyword was not triggered. Now that the aaa command is required, it automatically also allows regular password authentication for a username if the password (or nopassword ) keyword is present.
After you upgrade, the username command no longer requires the password or nopassword keyword; you can require that a user cannot enter a password. Therefore, to force public key authentication only, re-enter the username command: username admin privilege 15
Sample Network Topology for ASAv on AWS
The following figure shows the recommended topology for the ASAv in Routed Firewall Mode with four subnets configured in AWS for the ASAv (management, inside, outside, and DMZ).
Figure 10: Sample ASAv on AWS Deployment
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Deploy the ASAv on AWS
Deploy the ASAv on AWS
The following procedure is a top-level list of steps to set up AWS on the ASAv. For detailed steps for setup, see Getting Started with AWS .
Step 1
Step 2
Step 3
Log into aws.amazon.com
and choose your region.
Note AWS is divided into multiple regions that are isolated from each other. The region is displayed in the upper right corner of your screen. Resources in one region do not appear in another region. Check periodically to make sure you are in the intended region.
Click My Account > AWS Management Console , and under Networking, click VPC > Start VPC Wizard , and create your VPC by choosing a single public subnet, and set up the following (you can use the default settings unless otherwise noted):
• Inside and outside subnet—Enter a name for the VPC and the subnets.
• Internet Gateway—Enables direct connectivity over the Internet (enter the name of the Internet gateway).
• Outside table—Add entry to enable outbound traffic to the Internet (add 0.0.0.0/0 to Internet Gateway).
Click My Account > AWS Management Console > EC2 , and then click Create an Instance .
• Select your AMI (for example Ubuntu Server 14.04 LTS).
Use the AMI identified in the your image delivery notification.
• Choose the instance type supported by the ASAv (for example, c3.large).
• Configure the instance (CPUs and memory are fixed).
• Expand the Advanced Details section and in the User data field you can optionally enter a Day 0 configuration, which is text input that contains the ASAv configuration applied when the ASAv is launched. For more information on how to configure the Day 0 configuration with more information, such as Smart Licensing, see
• Management interface - If you choose to provide a Day 0 configuration, you must provide management interface details, which should be configured to use DHCP.
• Data interfaces - IP addresses for the data interfaces will be assigned and configured only if you provide that information as part of the Day 0 configuration. Data interfaces can be configured to use DHCP or, if the network interfaces to be attached are already created and the IP addresses are known, you can provide the IP details in the Day 0 configuration.
• Without Day 0 Configuration - If you deploy the ASAv without providing the Day 0 configuration, the ASAv applies the default ASAv configuration where it fetches the IPs of the attached interfaces from the AWS metadata server and allocates the IP addresses (the data interfaces will get the IPs assigned but the ENIs will be down).
Management0/0 interface will be up and gets the IP configured with DHCP address. See IP Addressing in your
VPC for information about Amazon EC2 and Amazon VPC IP addressing.
• Sample Day 0 Configuration -
! ASA Version 9.x.1.200
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Step 4
Step 5
Step 6 interface management0/0 management-only nameif management security-level 100 ip address dhcp setroute no shut
!
interface gigabitEthernet0/0 nameif inside security-level 100 ip address dhcp no shut
!
interface gigabitEthernet0/1 nameif outside security-level 100 ip address <IPv4> <netmask> no shut
!
same-security-traffic permit inter-interface same-security-traffic permit intra-interface
!
crypto key generate rsa modulus 2048 ssh 0 0 management ssh timeout 30 username admin nopassword privilege 15 username admin attributes service-type admin
! required config end
! example dns configuration dns domain-lookup management
DNS server-group DefaultDNS
! where this address is the .2 on your public subnet name-server 172.19.0.2
! example ntp configuration name 129.6.15.28 time-a.nist.gov
name 129.6.15.29 time-b.nist.gov
name 129.6.15.30 time-c.nist.gov
ntp server time-c.nist.gov
ntp server time-b.nist.gov
ntp server time-a.nist.gov
• Storage (accept the defaults).
• Tag Instance—You can create a lot of tags to classify your devices. Give it a name you can use to find it easily.
• Security Group—Create a security group and name it. The security group is a virtual firewall for an instance to control inbound and outbound traffic.
By default the Security Group is open to all addresses. Change the rules to only allow SSH in from addresses used to access your ASAv.
• Review your configuration and then click Launch .
Create a Key Pair.
Caution Give the key pair a name you will recognize and download the key to a safe place; the key can never be downloaded again. If you lose the key pair, you must destroy your instances and redeploy them again.
Click Launch Instance to deploy your ASAv.
Click My Account > AWS Management Console > EC2 > Launch an Instance > My AMIs .
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Step 7 Make sure that the Source/Destination Check is disabled per interface for the ASAv.
AWS default settings only allow an instance to receive traffic for its IP address and only allow an instance to send traffic from its own IP address. To enable the ASAv to act as a routed hop, you must disable the Source/Destination Check on each of the ASAv's traffic interfaces (inside, outside, and DMZ).
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Deploy the ASAv On the Microsoft Azure Cloud
You can deploy the ASAv on the Microsoft Azure cloud.
•
About ASAv Deployment On the Microsoft Azure Cloud, on page 67
•
Prerequisites and System Requirements for the ASAv and Azure, on page 67
•
Guidelines and Limitations, on page 69
•
Resources Created During Deployment, on page 70
•
•
Routing Configuration for VMs in the Virtual Network, on page 71
•
•
•
Deploy the ASAv on Microsoft Azure, on page 72
About ASAv Deployment On the Microsoft Azure Cloud
Microsoft Azure is a public cloud environment that uses a private Microsoft Hyper V Hypervisor. The ASAv runs as a guest in the Microsoft Azure environment of the Hyper V Hypervisor. The ASAv on Microsoft
Azure supports the Standard D3 and Standard D3_v2 instances, which supports four vCPUs, 14 GB, and four interfaces.
You can deploy the ASAv on Microsoft Azure:
• As a stand-alone firewall using the Azure Resource Manager on the standard Azure public cloud and the
Azure Government environments
• As an integrated partner solution using the Azure Security Center
• As a high availability (HA) pair using the Azure Resource Manager on the standard Azure public cloud and the Azure Government environments
See
Deploy the ASAv from Azure Resource Manager, on page 73 . Note that you can deploy the ASAv HA
configuration on the standard Azure public cloud and the Azure Government environments.
Prerequisites and System Requirements for the ASAv and Azure
• Create an account on Azure.com
.
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Prerequisites and System Requirements for the ASAv and Azure
After you create an account on Microsoft Azure, you can log in, choose the ASAv in the Microsoft Azure
Marketplace, and deploy the ASAv.
• License the ASAv.
Until you license the ASAv, it will run in degraded mode, which allows only 100 connections and throughput of 100 Kbps. See Smart Software Licensing for the ASAv .
Note The ASAv defaults to the ASAv30 entitlement when deployed on Azure. The use of the ASAv5 and ASAv10 entitlement is allowed. However, the throughput level must be explicitly configured to use the ASAv5 or ASAv10 entitlement.
• Interface requirements:
You must deploy the ASAv with four interfaces on four networks. You can assign a public IP address to any interface; see Public IP addresses for Azure's guidelines regarding public IPs, including how to create, change, or delete a public IP address.
• Management Interface
Note In Azure, the first defined interface is always the Management interface.
Note For edge firewall configurations, the Management interface is also used as the
“outside” interface.
• Inside and outside interfaces
• Additional subnet (DMZ or any network you choose)
• Communications paths:
• Management interface—Used for SSH access and to connect the ASAv to the ASDM.
• Inside interface (required)—Used to connect the ASAv to inside hosts.
• Outside interface (required)—Used to connect the ASAv to the public network.
• DMZ interface (optional)—Used to connect the ASAv to the DMZ network when using the
Standard_D3 interface.
• For ASAv hypervisor and virtual platform support information, see Cisco ASA Compatibility .
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Guidelines and Limitations
Guidelines and Limitations
Supported Features
• Deployment from Microsoft Azure Cloud
• Maximum of 16 vCPUs, based on the selected instance type
Note Azure does not provide configurable L2 vSwitch capability.
• Public IP address on any interface
You can assign a public IP address to any interface; see Public IP addresses for Azure's guidelines regarding public IPs, including how to create, change, or delete a public IP address.
• Routed firewall mode (default)
Note In routed firewall mode the ASAv is a traditional Layer 3 boundary in the network.
This mode requires an IP address for each interface. Because Azure does not support VLAN tagged interfaces, the IP addresses must be configured on non-tagged, non-trunk interfaces.
Unsupported Features
• Console access (management is performed using SSH or ASDM over network interfaces)
• IPv6
• VLAN tagging on user instance interfaces
• Jumbo frames
• Proxy ARP for an IP address that the device does not own from an Azure perspective
• Promiscuous mode (no sniffing or transparent mode firewall support)
Note Azure policy prevents the ASAv from operating in transparent firewall mode because it doesn't allow interfaces to operate in promiscuous mode.
• Multi-context mode
• Clustering
• ASAv native HA
• VM import/export
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Resources Created During Deployment
• By default, FIPS mode is not enabled on the ASAv running in the Azure cloud.
Note If you enable FIPS mode, you must change the Diffie-Helman key exchange group to a stronger key by using the ssh key-exchange group dh-group14-sha1 command. If you don’t change the Diffie-Helman group, you will no longer be able to SSH to the ASAv, and that is the only way to initially manage the ASAv.
Resources Created During Deployment
When you deploy the ASAv in Azure the following resources are created:
• The ASAv Virtual Machine (VM)
• A resource group (unless you chose an existing resource group)
The ASAv resource group must be the same resource group used by the Virtual Network and the Storage
Account.
• Four NICS named vm name-Nic0, vm name-Nic1, vm name-Nic2, vm name-Nic3
These NICs map to the ASAv interfaces Management 0/0, GigabitEthernet 0/0, GigabitEthernet 0/1, and
GigabitEthernet 0/2 respectively.
• A security group named vm name-SSH-SecurityGroup
The security group will be attached to the VM’s Nic0, which maps to ASAv Management 0/0.
The security group includes rules to allow SSH and UDP ports 500 and UDP 4500 for VPN purposes.
You can modify these values after deployment.
• Public IP addresses (named according to the value you chose during deployment)
You can assign a public IP address to any interface; see Public IP addresses for Azure's guidelines regarding public IPs, including how to create, change, or delete a public IP address.
• A Virtual Network with four subnets (unless you chose an existing network)
• A Routing Table for each subnet (updated if it already exists)
The tables are named subnet name-ASAv-RouteTable.
Each routing table includes routes to the other three subnets with the ASAv IP address as the next hop.
You may chose to add a default route if traffic needs to reach other subnets or the Internet.
• A boot diagnostics file in the selected storage account
The boot diagnostics file will be in Blobs (binary large objects).
• Two files in the selected storage account under Blobs and container VHDs named vm name -disk.vhd
and vm name -<uuid>.status
• A Storage account (unless you chose an existing storage account)
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Azure Routing
Note When you delete a VM, you must delete each of these resources individually, except for any resources you want to keep.
Azure Routing
Routing in an Azure Virtual Network is determined by the Virtual Network’s Effective Routing Table. The
Effective Routing Table is a combination of an existing System Routing Table and the User Defined Routing
Table.
Note The ASAv cannot use dynamic interior routing protocols like EIGRP and OSPF due to the nature of Azure cloud routing. The Effective Routing Table determines the next hop, regardless of whether a virtual client has any static/dynamic route configured.
Currently you cannot view either the Effective Routing Table or the System Routing Table.
You can view and edit the User Defined Routing table. When the System table and the User Defined tables are combined to form the Effective Routing Table, the most specific route wins and ties go to the User Defined
Routing table. The System Routing Table includes a default route (0.0.0.0/0) pointing to Azure’s Virtual
Network Internet Gateway. The System Routing Table also includes specific routes to the other defined subnets with the next-hop pointing to Azure’s Virtual Network infrastructure gateway.
To route traffic through the ASAv, the ASAv deployment process adds routes on each subnet to the other three subnets using the ASAv as the next hop. You may also want to add a default route (0.0.0.0/0) that points to the ASAv interface on the subnet. This will send all traffic from the subnet through the ASAv, which may require that ASAv policies be configured in advance to handle that traffic (perhaps using NAT/PAT).
Because of the existing specific routes in the System Routing Table, you must add specific routes to the User
Defined Routing table to point to the ASAv as the next-hop. Otherwise, a default route in the User Defined table would lose to the more specific route in the System Routing Table and traffic would bypass the ASAv.
Routing Configuration for VMs in the Virtual Network
Routing in the Azure Virtual Network depends on the Effective Routing Table and not the particular gateway settings on the clients. Clients running in a Virtual Network may be given routes by DHCP that are the .1
address on their respective subnets. This is a place holder and serves only to get the packet to the Virtual
Network’s infrastructure virtual gateway. Once a packet leaves the VM it is routed according to the Effective
Routing Table (as modified by the User Defined Table). The Effective Routing Table determines the next hop regardless of whether a client has a gateway configured as .1 or as the ASAv address.
Azure VM ARP tables will show the same MAC address (1234.5678.9abc) for all known hosts. This ensures that all packets leaving an Azure VM will reach the Azure gateway where the Effective Routing Table will be used to determine the path of the packet.
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IP Addresses
Note The ASAv cannot use dynamic interior routing protocols like EIGRP and OSPF due to the nature of Azure cloud routing. The Effective Routing Table determines the next hop, regardless of whether a virtual client has any static/dynamic route configured.
IP Addresses
The following information applies to IP addresses in Azure:
• You should use DHCP to set the IP addresses of ASAv interfaces. Furthermore, Management 0/0 (which maps to the first NIC on the ASAv) is required to use DHCP to obtain its IP address.
The Azure infrastructure ensures that the ASAv interfaces are assigned the IP addresses set in Azure.
• Management 0/0 is given a private IP address in the subnet to which it is attached.
A public IP address may be associated with this private IP address and the Azure Internet gateway will handle the NAT translations.
• You can assign a public IP address to any interface.
• Public IP addresses that are dynamic may change during an Azure stop/start cycle. However, they are persistent during Azure restart and during ASAv reload.
• Public IP addresses that are static won't change until you change them in Azure.
DNS
All Azure virtual networks have access to a built-in DNS server at 168.63.129.16 that you can use as follows: configure terminal dns domain-lookup management dns server-group DefaultDNS name-server 168.63.129.16
end
You can use this configuration when you configure Smart Licensing and you don’t have your own DNS Server set up.
Deploy the ASAv on Microsoft Azure
You can deploy the ASAv on Microsoft Azure.
• Deploy the ASAv as a stand-alone firewall using the Azure Resource Manager on the standard Azure public cloud and the Azure Government environments. See
Deploy the ASAv from Azure Resource
• Deploy the ASAv as an integrated partner solution within Azure using the Azure Security Center.
Security-conscious customers are offered the ASAv as a firewall option to protect Azure workloads.
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Deploy the ASAv from Azure Resource Manager
Security and health events are monitored from a single integrated dashboard. See
• Deploy an ASAv High Availablity pair using the Azure Resource Manager. To ensure redundancy, you can deploy the ASAv in an Active/Backup high availability (HA) configuration. HA in the public cloud implements a stateless Active/Backup solution that allows for a failure of the active ASAv to trigger an automatic failover of the system to the backup ASAv. See
Deploy ASAv for High Availability from
Azure Resource Manager, on page 76
.
Deploy the ASAv from Azure Resource Manager
The following procedure is a top-level list of steps to set up Microsoft Azure on the ASAv. For detailed steps for Azure setup, see Getting Started with Azure .
When you deploy the ASAv in Azure it automatically generates various configurations, such as resources, public IP addresses, and route tables. You can further manage these configurations after deployment. For example, you may want to change the Idle Timeout value from the default, which is a low timeout.
Step 1
Step 2
Step 3
Step 4
Log into the Azure Resource Manager (ARM) portal.
The Azure portal shows virtual elements associated with the current account and subscription regardless of data center location.
Search Marketplace for Cisco ASAv, and then click on the ASAv you would like to deploy.
Configure the basic settings.
a) Enter a name for the virtual machine. This name should be unique within your Azure subscription.
Important If your name is not unique and you reuse an existing name, the deployment will fail.
b) Enter your username.
c) Choose an authentication type, either Password or SSH public key .
If you choose Password , enter a password and confirm.
d) Choose your subscription type.
e) Choose a Resource group .
The resource group should be the same as the virtual network’s resource group.
f) Choose your location.
The location should be the same as for your network and resource group.
g) Click OK .
Configure the ASAv settings.
a) Choose the virtual machine size.
The ASAv supports Standard D3 and Standard D3_v2.
b) Choose a storage account.
You can use an existing storage account or create a new one. The location of the storage account should be the same as for the network and virtual machine.
c) Request a public IP address by entering a label for the IP address in the Name field, and then click OK .
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Step 5
Step 6
Azure creates a dynamic public IP by default, which may change when the VM is stopped and restarted. If you prefer a fixed IP address, you can open the public-ip in the portal and change it from a dynamic to a static address.
d) Add a DNS label if desired.
The fully qualified domain name will be your DNS label plus the Azure URL:
<dnslabel>.<location>.cloupapp.azure.com
e) Choose an existing virtual network or create a new one.
f) Configure the four subnets that the ASAv will deploy to, and then click OK .
Important Each interface must be attached to a unique subnet.
g) Click OK .
View the configuration summary, and then click OK .
View the terms of use and then click Create .
Deploy the ASAv from Azure Security Center
The Microsoft Azure Security Center is a security solution for Azure that enables customers to protect, detect, and mitigate security risks for their cloud deployments. From the Security Center dashboard, customers can set security policies, monitor security configurations, and view security alerts.
Security Center analyzes the security state of Azure resources to identify potential security vulnerabilities. A list of recommendations guides customers through the process of configuring needed controls, which can include deployment of the ASAv as a firewall solution to Azure customers.
As an integrated solution in Security Center, you can rapidly deploy the ASAv in just a few clicks and then monitor security and health events from a single dashboard. The following procedure is a top-level list of steps to deploy the ASAv from Security Center. For more detailed information, see Azure Security Center .
Step 1
What to do next
• Continue configuration using CLI commands available for input via SSH or use ASDM. See
for instructions for accessing the ASDM.
Step 2
Step 3
Step 4
Step 5
Log into the Azure portal.
The Azure portal shows virtual elements associated with the current account and subscription regardless of data center location.
From the Microsoft Azure menu, choose Security Center .
If you are accessing Security Center for the first time, the Welcome blade opens. Choose Yes! I want to Launch Azure
Security Center to open the Security Center blade and to enable data collection.
On the Security Center blade, choose the Policy tile.
On the Security policy blade, choose Prevention policy .
On the Prevention policy blade, turn on the recommendations that you want to see as part of your security policy.
a) Set Next generation firewall to On . This ensures that the ASAv is a recommended solution in Security Center.
b) Set any other recommendations as needed.
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Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Step 12
Return to the Security Center blade and the Recommendations tile.
Security Center periodically analyzes the security state of your Azure resources. When Security Center identifies potential security vulnerabilities, it shows recommendations on the Recommendations blade.
Select the Add a Next Generation Firewall recommendation on the Recommendations blade to view more information and/or to take action to resolve the issue.
Choose Create New or Use existing solution , and then click on the ASAv you would like to deploy.
Configure the basic settings.
a) Enter a name for the virtual machine. This name should be unique within your Azure subscription.
Important If your name is not unique and you reuse an existing name, the deployment will fail.
b) Enter your username.
c) Choose an authorization type either password or SSH key.
If you choose password, enter a password and confirm.
d) Choose your subscription type.
e) Choose a resource group.
The resource group should be the same as the virtual network’s resource group.
f) Choose your location.
The location should be the same as for your network and resource group.
g) Click OK .
Configure the ASAv settings.
a) Choose the virtual machine size.
The ASAv supports Standard D3 and Standard D3_v2.
b) Choose a storage account.
You can use an existing storage account or create a new one. The location of the storage account should be the same as for the network and virtual machine.
c) Request a public IP address by entering a label for the IP address in the Name field, and then click OK .
Azure creates a dynamic public IP by default, which may change when the VM is stopped and restarted. If you prefer a fixed IP address, you can open the public-ip in the portal and change it from a dynamic to a static address.
d) Add a DNS label if desired.
The fully qualified domain name will be your DNS label plus the Azure URL:
<dnslabel>.<location>.cloupapp.azure.com
e) Choose an existing virtual network or create a new one.
f) Configure the four subnets that the ASAv will deploy to, and then click OK .
Important Each interface must be attached to a unique subnet.
g) Click OK .
View the configuration summary, and then click OK .
View the terms of use and then click Create .
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What to do next
• Continue configuration using CLI commands available for input via SSH or use ASDM. See
for instructions for accessing the ASDM.
• If you need more information on how the recommendations in Security Center help you protect your
Azure resources, see the documentation available from Security Center.
Deploy ASAv for High Availability from Azure Resource Manager
The following procedure is a top-level list of steps to set up a High Availability (HA) ASAv pair on Microsoft
Azure. For detailed steps for Azure setup, see Getting Started with Azure .
ASAv HA in Azure deploys two ASAvs into an Availability Set, and automatically generates various configurations, such as resources, public IP addresses, and route tables. You can further manage these configurations after deployment.
Step 1
Step 2
Step 3
Step 4
Log into the Azure portal.
The Azure portal shows virtual elements associated with the current account and subscription regardless of data center location.
Search Marketplace for Cisco ASAv , and then click on the ASAv 4 NIC HA to deploy a failover ASAv configuration.
Configure the Basics settings.
a) Enter a prefix for the ASAv virtual machine names. The ASAv names will be ‘prefix’-A and ‘prefix’-B.
Important Make sure you do not use an existing prefix or the deployment will fail.
b) Enter a Username .
This will be the administrative username for both Virtual Machines.
Important The username admin is not allowed in Azure.
c) Choose an authentication type for both Virtual Machines, either Password or SSH public key .
If you choose Password , enter a password and confirm.
d) Choose your subscription type.
e) Choose a Resource group .
Choose Create new to create a new resource group, or Use existing to select an existing resource group. If you use an existing resource group, it must be empty. Otherwise you should create a new resource group.
f) Choose your Location .
The location should be the same as for your network and resource group.
g) Click OK .
Configure the Cisco ASAv settings .
a) Choose the Virtual Machine size.
The ASAv supports Standard D3 and Standard D3_v2.
b) Choose Managed or Unmanaged OS disk storage.
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Step 5
Step 6
Step 7
Step 8
Step 9
Important ASA HA mode always uses Managed .
Configure the ASAv-A settings.
a) (Optional) Choose Create new to request a public IP address by entering a label for the IP address in the Name field, and then click OK . Choose None if you do not want a public IP address.
Note Azure creates a dynamic public IP by default, which may change when the VM is stopped and restarted.
If you prefer a fixed IP address, you can open the public-ip in the portal and change it from a dynamic to a static address.
b) Add a DNS label if desired.
The fully qualified domain name will be your DNS label plus the Azure URL:
<dnslabel>.<location>.cloupapp.azure.com
c) Configure the required settings for the storage account for the ASAv-A boot diagnostics.
Repeat the previous steps for the ASAv-B settings.
Choose an existing virtual network or create a new one.
a) Configure the four subnets that the ASAv will deploy to, and then click OK .
Important Each interface must be attached to a unique subnet.
b) Click OK .
View the Summary configuration, and then click OK .
View the terms of use and then click Create .
What to do next
• Continue configuration using CLI commands available for input via SSH or use ASDM. See
for instructions for accessing the ASDM.
• See the ASA Configuration Guide chapter “Failover for High Availability in the Public Cloud” for more information about ASAv HA configuration in Azure.
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Deploy the ASAv Using Hyper-V
You can deploy the ASAv using Microsoft Hyper-V.
•
About ASAv Deployment Using Hyper-V, on page 79
•
Guidelines and Limitations for ASAv and Hyper-V, on page 80
•
Prerequisites for the ASAv and Hyper-V, on page 81
•
Prepare the Day 0 Configuration File, on page 82
•
Deploy the ASAv with the Day 0 Configuration File Using the Hyper-V Manager, on page 83
•
Install the ASAv on Hyper-V Using the Command Line, on page 84
•
Install the ASAv on Hyper-V Using the Hyper-V Manager, on page 85
•
Add a Network Adapter from the Hyper-V Manager, on page 92
•
Modify the Network Adapter Name, on page 94
•
MAC Address Spoofing, on page 95
•
About ASAv Deployment Using Hyper-V
You can deploy Hyper-V on a standalone Hyper-V server or through the Hyper-V Manager. For instructions to install using the Powershell CLI commands, see Install the ASAv on Hyper-V Using the Command Line, page 46. For instructions to install using the Hyper-V Manager, see Install the ASAv on Hyper-V Using the
Hyper-V Manager, page 46. Hyper-V does not provide a serial console option. You can manage Hyper-V through SSH or ASDM over the management interface. See Configuring SSH, page 54 for information to set up SSH.
The following figure shows the recommended topology for the ASAv in Routed Firewall Mode. There are three subnets set up in Hyper-V for the ASAv—management, inside, and outside.
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Guidelines and Limitations for ASAv and Hyper-V
Figure 11: Recommended Topology for the ASAv in Routed Firewall Mode
Deploy the ASAv Using Hyper-V
Guidelines and Limitations for ASAv and Hyper-V
• Platform Support
• Cisco UCS B-Series servers
• Cisco UCS C-Series servers
• Hewlett Packard Proliant DL160 Gen8
• OS Support
• Windows Server 2012
• Native Hyper-V
Note The ASAv should run on most modern, 64-bit high-powered platforms used for virtualization today.
• File format
Supports the VHDX format for initial deployment of the ASAv on Hyper-V.
• Day 0 configuration
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Prerequisites for the ASAv and Hyper-V
You create a text file that contains the ASA CLI configuration commands that you need. See
Prepare the Day 0 Configuration File
for the procedure.
• Firewall Transparent Mode with Day 0 configuration
The configuration line ‘firewall transparent’ must be at the top of the day 0 configuration file; if is appears anywhere else in the file, you could experience erratic behavior. See
Prepare the Day 0 Configuration
for the procedure.
• Failover
The ASAv on Hyper-V supports Active/Standby failover. For Active/Standby failover in both routed mode and transparent mode you must enable MAC Address spoofing on ALL virtual network adapters.
See Configure MAC Address Spoofing, page 53. For transparent mode for the standalone ASAv, the management interface should NOT have MAC address spoofing enabled. Active/Active failover is NOT supported.
• Hyper-V supports up to eight interfaces. Management 0/0 and GigabitEthernet 0/0 through 0/6. You can use GigabitEthernet as a failover link.
• VLANs
Use the Set-VMNetworkAdapterVLan Hyper-V Powershell command to set VLANs on an interface in trunk mode. You can set the NativeVlanID for the management interface as a particular VLAN or ‘0’ for no VLAN. Trunk mode is not persistent across Hyper-V host reboots. You must reconfigure trunk mode after every reboot.
• Legacy network adapters are not supported.
• Generation 2 virtual machines are not supported.
• Microsoft Azure is not supported.
Prerequisites for the ASAv and Hyper-V
• Install Hyper-V on MS Windows 2012.
• Create the Day 0 configuration text file if you are using one.
You must add the Day 0 configuration before the ASAv is deployed for the first time; otherwise, you must perform a write erase from the ASAv to use the Day 0 configuration. See
for the procedure.
• Download the ASAv VHDX file from Cisco.com.
http://www.cisco.com/go/asa-software
Note A Cisco.com login and Cisco service contract are required.
• Hyper-V switch configured with at least three subnets/VLANs.
• For Hyper-V system requirements, see Cisco ASA Compatibility .
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Prepare the Day 0 Configuration File
Prepare the Day 0 Configuration File
You can prepare a Day 0 configuration file before you launch the ASAv. This file is a text file that contains the ASAv configuration that will be applied when the ASAv is launched. This initial configuration is placed into a text file named “day0-config” in a working directory you chose, and is manipulated into a day0.iso file that is mounted and read on first boot. At the minimum, the Day 0 configuration file must contain commands that will activate the management interface and set up the SSH server for public key authentication, but it can also contain a complete ASA configuration. The day0.iso file (either your custom day0.iso or the default day0.iso) must be available during first boot.
Before you begin
We are using Linux in this example, but there are similar utilities for Windows.
• To automatically license the ASAv during initial deployment, place the Smart Licensing Identity (ID)
Token that you downloaded from the Cisco Smart Software Manager in a text file named ‘idtoken’ in the same directory as the Day 0 configuration file.
• If you want to deploy the ASAv in transparent mode, you must use a known running ASA config file in transparent mode as the Day 0 configuration file. This does not apply to a Day 0 configuration file for a routed firewall.
• You must add the Day 0 configuration file before you boot the ASAv for the first time. If you decide you want to use a Day 0 configuration after you have initially booted the ASAv, you must execute a write erase command, apply the day 0 configuration file, and then boot the ASAv.
Step 1 Enter the CLI configuration for the ASAv in a text file called “day0-config”. Add interface configurations for the three interfaces and any other configuration you want.
The fist line should begin with the ASA version. The day0-config should be a valid ASA configuration. The best way to generate the day0-config is to copy the desired parts of a running config from an existing ASA or ASAv. The order of the lines in the day0-config is important and should match the order seen in an existing show run command output.
Example:
ASA Version 9.5.1
!
interface management0/0 nameif management security-level 100 ip address 192.168.1.2 255.255.255.0
no shutdown interface gigabitethernet0/0 nameif inside security-level 100 ip address 10.1.1.2 255.255.255.0
no shutdown interface gigabitethernet0/1 nameif outside security-level 0 ip address 198.51.100.2 255.255.255.0
no shutdown http server enable http 192.168.1.0 255.255.255.0 management crypto key generate rsa modulus 1024 username AdminUser password paSSw0rd
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Deploy the ASAv with the Day 0 Configuration File Using the Hyper-V Manager
Step 2
Step 3
Step 4
Step 5
Step 6 ssh 192.168.1.0 255.255.255.0 management aaa authentication ssh console LOCAL
(Optional) Download the Smart License identity token file issued by the Cisco Smart Software Manager to your computer.
(Optional) Copy the ID token from the download file and put it a text file that only contains the ID token.
(Optional) For automated licensing during initial ASAv deployment, make sure the following information is in the day0-config file:
• Management interface IP address
• (Optional) HTTP proxy to use for Smart Licensing
• A route command that enables connectivity to the HTTP proxy (if specified) or to tools.cisco.com
• A DNS server that resolves tools.cisco.com to an IP address
• Smart Licensing configuration specifying the ASAv license you are requesting
• (Optional) A unique host name to make the ASAv easier to find in CSSM
Generate the virtual CD-ROM by converting the text file to an ISO file: stack@user-ubuntu:-/KvmAsa$ sudo genisoimage -r -o day0.iso day0-config idtoken
I: input-charset not specified, using utf-8 (detected in locale settings)
Total translation table size: 0
Total rockridge attributes bytes: 252
Total directory bytes: 0
Path table size (byptes): 10
Max brk space used 0
176 extents written (0 MB) stack@user-ubuntu:-/KvmAsa$
The Identity Token automatically registers the ASAv with the Smart Licensing server.
Repeat Steps 1 through 5 to create separate default configuration files with the appropriate IP addresses for each ASAv you want to deploy.
Deploy the ASAv with the Day 0 Configuration File Using the
Hyper-V Manager
After you set up the Day 0 configuration file (
Prepare the Day 0 Configuration File
), you can deploy it using the Hyper-V Manager.
Step 1
Step 2
Go to Server Manager > Tools > Hyper-V Manager .
Click Settings on the right side of the Hyper-V Manager. The Settings dialog box opens. Under Hardware on the left, click IDE Controller 1 .
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Figure 12: Hyper-V Manager
Deploy the ASAv Using Hyper-V
Step 3 Under Media in the right pane, select the Image file radio button, and then browse to the directory where you keep your
Day 0 ISO configuration file, and then click Apply . When you boot up your ASAv for the first time, it will be configured based on what is in the Day 0 configuration file.
Install the ASAv on Hyper-V Using the Command Line
You can install the ASAv on Hyper-V through the Windows Powershell command line. If you are on a standalone Hyper-V server, you must use the command line to install Hyper-V.
Step 1
Step 2
Step 3
Open a Windows Powershell.
Deploy the ASAv:
Example: new-vm -name $fullVMName -MemoryStartupBytes $memorysize -Generation 1 -vhdpath
C:\Users\jsmith.CISCO\ASAvHyperV\$ImageName.vhdx -Verbose
Depending on your ASAv model, change the CPU count from the default of 1.
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Install the ASAv on Hyper-V Using the Hyper-V Manager
Step 4
Step 5
Step 6
Step 7
Step 8
Example: set-vm -Name $fullVMName -ProcessorCount 4
(Optional) Change the interface name to something that makes sense to you.
Example:
Get-VMNetworkAdapter -VMName $fullVMName -Name "Network Adapter" | Rename-vmNetworkAdapter -NewName mgmt
(Optional) Change the VLAN ID if your network requires it.
Example:
Set-VMNetworkAdapterVlan -VMName $fullVMName -VlanId 1151 -Access -VMNetworkAdapterName "mgmt"
Refresh the interface so that Hyper-V picks up the changes.
Example:
Connect-VMNetworkAdapter -VMName $fullVMName -Name "mgmt" -SwitchName 1151mgmtswitch
Add the inside interface.
Example:
Add-VMNetworkAdapter -VMName $fullVMName -name "inside" -SwitchName 1151mgmtswitch
Set-VMNetworkAdapterVlan -VMName $fullVMName -VlanId 1552 -Access -VMNetworkAdapterName "inside"
Add the outside interface.
Example:
Add-VMNetworkAdapter -VMName $fullVMName -name "outside" -SwitchName 1151mgmtswitch
Set-VMNetworkAdapterVlan -VMName $fullVMName -VlanId 1553 -Access -VMNetworkAdapterName “outside"
Install the ASAv on Hyper-V Using the Hyper-V Manager
You can use the Hyper-V Manager to install the ASAv on Hyper-V.
Step 1 Go to Server Manager > Tools > Hyper-V Manager .
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Figure 13: Server Manager
Step 2 The Hyper-V Manager appears.
Figure 14: Hyper-V Manager
Deploy the ASAv Using Hyper-V
Step 3 From the list of hypervisors on the right, right-click the desired Hypervisor in the list and choose New > Virtual
Machine .
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Figure 15: Launch New Virtual Machine
Install the ASAv on Hyper-V Using the Hyper-V Manager
Step 4 The New Virtual Machine Wizard appears.
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Figure 16: New Virtual Machine Wizard
Deploy the ASAv Using Hyper-V
Step 5
Step 6
Working through the wizard, specify the following information:
• Name and location of your ASAv
• Generation of your ASAv
The only Generation supported for the ASAv is Generation 1 .
• Amount of memory for your ASAv (1024 MB for ASAv5, 2048 MB for ASAv 10, 8192 MB for ASAv30)
• Network adapter (connect to the virtual switch you have already set up)
• Virtual hard disk and location
Choose Use an existing virtual hard disk and browse to the location of your VHDX file.
Click Finish and a dialog box appears showing your ASAv configuration.
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Figure 17: New Virtual Machine Summary
Install the ASAv on Hyper-V Using the Hyper-V Manager
Step 7 If your ASAv has four vCPUs, you must modify the vCPU value before starting up your ASAv. Click Settings on the right side of the Hyper-V Manager. The Settings dialog box opens. Under the Hardware menu on the left, click Processor to get to the Processor pane. Change the Number of virtual processors to 4.
The ASAv5 and ASAv10 have one vCPU, and the ASAv 30 have four vCPUs. The default is 1.
The 100Mbps and 1Gbps entitlements have one vCPU, and the 2Gbps entitlement has four vCPUs. The default is 1.
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Figure 18: Virtual Machine Processor Settings
Deploy the ASAv Using Hyper-V
Step 8 In the Virtual Machines menu, connect to your ASAv by right-clicking on the name of the ASAv in the list and clicking
Connect . The console opens with the stopped ASAv.
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Figure 19: Connect to the Virtual Machine
Install the ASAv on Hyper-V Using the Hyper-V Manager
Step 9 In the Virtual Machine Connection console window, click the turquoise Start button to start the ASAv.
Figure 20: Start the Virtual Machine
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Add a Network Adapter from the Hyper-V Manager
Step 10 The boot progress of the ASAv is shown in the console.
Figure 21: Virtual Machine Boot Progress
Deploy the ASAv Using Hyper-V
Add a Network Adapter from the Hyper-V Manager
A newly deployed ASAv has only one network adapter. You need to add at least two more network adapters.
In this example, we are adding the inside network adapter.
Before you begin
• The ASAv must be in the off state.
Step 1 Click Settings on the right side of the Hyper-V Manager. The Settings dialog box opens. Under the Hardware menu on the left, click Add Hardware , and then click Network Adapter .
Note Do NOT use the Legacy Network Adapter.
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Figure 22: Add Network Adapter
Add a Network Adapter from the Hyper-V Manager
Step 2 After the network adapter has been added, you can modify the virtual switch and other features. You can also set the
VLAN ID here if needed.
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Modify the Network Adapter Name
Figure 23: Modify Network Adapter Settings
Deploy the ASAv Using Hyper-V
Modify the Network Adapter Name
In Hyper-V, a generic network interface name is used, ‘Network Adapter.’ This can be confusing if the network interfaces all have the same name. You cannot modify the name using the Hyper-V Manager. You must modify it using the Windows Powershell commands.
Step 1
Step 2
Open a Windows Powershell.
Modify the network adapters as needed.
Example:
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MAC Address Spoofing
$NICRENAME= Get-VMNetworkAdapter -VMName 'ASAvVM' -Name "Network Adapter" rename-VMNetworkAdapter -VMNetworkAdapter $NICRENAME[0] -newname inside rename-VMNetworkAdapter -VMNetworkAdapter $NICRENAME[1] -newname outside
MAC Address Spoofing
For the ASAv to pass packets in transparent mode and for HA Active/Standby failover, you must turn on
MAC address spoofing for ALL interfaces. You can do this in the Hyper-V Manager or using Powershell commands.
Configure MAC Address Spoofing Using the Hyper-V Manager
You can use the Hyper-V Manager to configure MAC spoofing on Hyper-V.
Step 1
Step 2
Step 3
Step 4
Go to Server Manager > Tools > Hyper-V Manager .
The Hyper-V Manager appears.
Click Settings on the right side of the Hyper-V Manager to open the settings dialog box.
Under the Hardware menu on the left: a.
Click Inside and expand the menu.
b.
Click Advanced Features to get to the MAC address option.
c.
Click the Enable MAC address spoofing radio button.
Repeat for the Outside interface.
Configure MAC Address Spoofing Using the Command Line
You can use the the Windows Powershell command line to configure MAC spoofing on Hyper-V.
Step 1
Step 2
Open a Windows Powershell.
Configure MAC address spoofing.
Example:
Set-VMNetworkAdapter -VMName $vm_name\
-ComputerName $computer_name -MacAddressSpoofing On\
-VMNetworkAdapterName $network_adapter\r"
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Configure SSH
Configure SSH
You can configure the ASAv for SSH access over the management interface from the Virtual Machine
Connection in the Hyper-V Manager. If you are using a Day 0 configuration file, you can add SSH access to it. See
Prepare the Day 0 Configuration File
for more information.
Step 1
Step 2
Step 3
Verify that the RSA key pair is present:
Example: asav# show crypto key mypubkey rsa
If there is no RSA key pair, generate the RSA key pair:
Example: asav(conf t)# crypto key generate rsa modulus 2048 username test password test123 privilege 15 aaa authentication ssh console LOCAL ssh 10.7.24.0 255.255.255.0 management ssh version 2
Verify that you can access the ASAv using SSH from another PC.
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C H A P T E R
7
Configure the ASAv
Start ASDM
The ASAv deployment preconfigures ASDM access. From the client IP address you specified during deployment, you can connect to the ASAv management IP address with a web browser. This chapter also describes how to allow other clients to access ASDM and also how to allow CLI access (SSH or Telnet).
Other essential configuration tasks covered in this chapter include the license installation and common configuration tasks provided by wizards in ASDM.
•
•
Perform Initial Configuration Using ASDM, on page 98
•
Advanced Configuration, on page 99
Step 1
Step 2
Step 3
On the PC that you specified as the ASDM client, enter the following URL:
https://asa_ip_address/admin
The ASDM launch window appears with the following buttons:
• Install ASDM Launcher and Run ASDM
• Run ASDM
• Run Startup Wizard
To download the Launcher: a) Click Install ASDM Launcher and Run ASDM .
b) Leave the username and password fields empty (for a new installation), and click OK . With no HTTPS authentication configured, you can gain access to ASDM with no username and the enable password, which is blank by default. If you enabled HTTPS authentication, enter your username and associated password.
c) Save the installer to your PC, and then start the installer. The ASDM-IDM Launcher opens automatically after installation is complete.
d) Enter the management IP address, leave the username and password blank (for a new installation), and then click
OK . If you enabled HTTPS authentication, enter your username and associated password.
To use Java Web Start: a) Click Run ASDM or Run Startup Wizard .
b) Save the shortcut to your computer when prompted. You can optionally open it instead of saving it.
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Configure the ASAv
Perform Initial Configuration Using ASDM c) Start Java Web Start from the shortcut.
d) Accept any certificates according to the dialog boxes that appear. The Cisco ASDM-IDM Launcher appears.
e) Leave the username and password blank (for a new installation), and then click OK . If you enabled HTTPS authentication, enter your username and associated password.
Perform Initial Configuration Using ASDM
You can perform initial configuration using the following ASDM wizards and procedures.
• Run the Startup Wizard
• (Optional) Allow Access to Public Servers Behind the ASAv
• (Optional) Run VPN Wizards
• (Optional) Run Other Wizards in ASDM
For CLI configuration, see the Cisco ASA Series CLI configuration guides .
Run the Startup Wizard
Run the Startup Wizard to customize the security policy to suit your deployment.
Step 1
Step 2
Choose Wizards > Startup Wizard .
Customize the security policy to suit your deployment. You can set the following:
• Hostname
• Domain name
• Administrative passwords
• Interfaces
• IP addresses
• Static routes
• DHCP server
• Network address translation rules
• and more ...
(Optional) Allow Access to Public Servers Behind the ASAv
The Configuration > Firewall > Public Servers pane automatically configures the security policy to make an inside server accessible from the Internet. As a business owner, you might have internal network services,
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(Optional) Run VPN Wizards such as a web and FTP server, that need to be available to an outside user. You can place these services on a separate network behind the ASAv, called a demilitarized zone (DMZ). By placing the public servers on the
DMZ, any attacks launched against the public servers do not affect your inside networks.
(Optional) Run VPN Wizards
You can configure VPN using the following wizards ( Wizards > VPN Wizards ):
• Site-to-Site VPN Wizard—Creates an IPsec site-to-site tunnel between the ASAv and another VPN-capable device.
• AnyConnect VPN Wizard—Configures SSL VPN remote access for the Cisco AnyConnect VPN client.
AnyConnect provides secure SSL connections to the ASA for remote users with full VPN tunneling to corporate resources. You can configure the ASA policy to download the AnyConnect client to remote users when they initially connect through a browser. With AnyConnect 3.0 and later, the client can run either the SSL or IPsec IKEv2 VPN protocol.
• Clientless SSL VPN Wizard—Configures clientless SSL VPN remote access for a browser. Clientless, browser-based SSL VPN lets users establish a secure, remote-access VPN tunnel to the ASA using a web browser. After authentication, users access a portal page and can access specific, supported internal resources. The network administrator provides access to resources by users on a group basis. ACLs can be applied to restrict or allow access to specific corporate resources.
• IPsec (IKEv1 or IKEv2) Remote Access VPN Wizard—Configures IPsec VPN remote access for the
Cisco IPsec client.
(Optional) Run Other Wizards in ASDM
You can run other wizards in ASDM to configure failover with high availability, VPN cluster load balancing, and packet capture.
• High Availability and Scalability Wizard—Configure failover or VPN load balancing.
• Packet Capture Wizard—Configure and run packet capture. The wizard runs one packet capture on each of the ingress and egress interfaces. After capturing packets, you can save the packet captures to your
PC for examination and replay in the packet analyzer.
Advanced Configuration
To continue configuring your ASAv, see Navigating the Cisco ASA Series Documentation .
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