Cisco ASR 9000 Series Aggregation Services Router Netflow Americas Headquarters

Cisco ASR 9000 Series Aggregation Services Router Netflow Americas Headquarters
Cisco ASR 9000 Series Aggregation Services Router Netflow
Configuration Guide, Release 4.3.x
First Published: December 01, 2012
Last Modified: May 01, 2013
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CONTENTS
Preface
Preface v
Changes to This Document v
Obtaining Documentation and Submitting a Service Request v
CHAPTER 1
New and Changed Feature Information in Cisco IOS XR 1
New and Changed Features in Cisco IOS XR Software 1
CHAPTER 2
Configuring NetFlow 3
Prerequisites for Configuring NetFlow 4
Restrictions for Configuring NetFlow 4
Information About Configuring NetFlow 4
NetFlow Overview 4
Exporter Map Overview 5
Monitor Map Overview 5
Sampler Map Overview 6
Options Template Overview 6
NetFlow Configuration Submodes 8
Flow Exporter Map Configuration Submode 8
Flow Exporter Map Version Configuration Submode 9
Flow Monitor Map Configuration Submode 9
Sampler Map Configuration Submode 10
Enabling the NetFlow BGP Data Export Function 10
MPLS Flow Monitor with IPv4 and IPv6 Support 10
MPLS Cache Reorganization to Support Both IPv4 and IPv6 10
MPLS Packets with IPv6 Flows 11
Destination-based NetFlow Accounting 11
Netflow over BVI 12
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
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Contents
How to Configure NetFlow on Cisco IOS XR Software 12
Configuring an Exporter Map 13
Configuring a Sampler Map 15
Configuring a Monitor Map 16
Applying a Monitor Map and a Sampler Map to an Interface 19
Clearing NetFlow Data 20
Configuring NetFlow Collection of MPLS Packets with IPv6 Fields 21
Configuring Destination-based NetFlow Accounting 25
Configuring Netflow over BVI 27
ASR 9000 Ethernet LC Netflow 29
Supported features 29
Punt path policer rate 29
Calculating Punt path policer rate 30
ASR 9000 Ethernet Line Card Features 30
Configuration Examples for NetFlow 30
Sampler Map: Example 30
Exporter Map: Example 31
Flow Monitor Map: Examples 31
MPLS Flow Monitor with IPv4 and IPv6 Support: Examples 32
Destination-based NetFlow Accounting: Example 33
Configure BGP to display BGP attributes in netflow record: Example 33
Netflow over BVI: Example 34
Additional References 35
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
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Preface
This guide describes the Cisco IOS XR Netflow configurations. For complete command reference of NetFlow,
see the NetFlow Commands chapter in the Cisco ASR 9000 Series Aggregation Services Router Netflow
Command Reference.
The preface contains the following sections:
• Changes to This Document, page v
• Obtaining Documentation and Submitting a Service Request, page v
Changes to This Document
This table lists the changes made to this document since it was first printed.
Table 1: Changes to This Document
Revision
Date
Change Summary
OL-28382-03
September 2013
Republished for Cisco IOS XR
Release 4.3.2.
OL-28382-02
May 2013
Republished for Cisco IOS XR
Release 4.3.1.
OL-28382-01
December 2012
Initial release of this document.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service
request, and gathering additional information, see What's New in Cisco Product Documentation.
To receive new and revised Cisco technical content directly to your desktop, you can subscribe to the What's
New in Cisco Product Documentation RSS feed. RSS feeds are a free service.
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
v
Preface
Obtaining Documentation and Submitting a Service Request
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
vi
CHAPTER
1
New and Changed Feature Information in Cisco
IOS XR
For a complete list of new and changed features in Cisco IOS XR Software, Release 4.3.x, see the New and
Changed Features in Cisco IOS XR Software, Release 4.3.x for Cisco ASR 9000 Series Aggregation Services
Router document.
• New and Changed Features in Cisco IOS XR Software, page 1
New and Changed Features in Cisco IOS XR Software
This table summarizes the new and changed information for Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration
Guide
Table 2: New and Changed Information
Feature
Description
Changed in Release
Where Documented
Netflow in Satellite Gigabit
Ethernet
This feature was introduced.
Release 4.3.2
Configuring NetFlow chapter
• Restrictions for
Configuring NetFlow, on
page 4
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
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New and Changed Feature Information in Cisco IOS XR
New and Changed Features in Cisco IOS XR Software
Feature
Description
Changed in Release
Where Documented
Netflow over BVI
This feature is introduced.
Release 4.3.1
Configuring NetFlow chapter
• Netflow over BVI, on
page 12
• Configuring Netflow over
BVI, on page 27
• Netflow over BVI:
Example, on page 34
Refer NetFlow commands in
Cisco ASR 9000 Series
Aggregation Services Router
Netflow Command Reference
No new features in this release -
Release 4.3.0
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
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NA
CHAPTER
2
Configuring NetFlow
A NetFlow flow is a unidirectional sequence of packets that arrive on a single interface (or subinterface),
and have the same values for key fields.
NetFlow is useful for the following:
• Accounting/Billing—NetFlow data provides fine grained metering for highly flexible and detailed
resource utilization accounting.
• Network Planning and Analysis—NetFlow data provides key information for strategic network planning.
• Network Monitoring—NetFlow data enables near real-time network monitoring capabilities.
Feature History for Configuring NetFlow
Release
Modification
Release 3.9.1
This feature was introduced.
Release 4.0.0
IPv6 Sampled NetFlow feature was introduced.
Release 4.2.0
Destination-based Netflow Accounting feature was introduced.
Release 5.2.0
The VRF table was added:
Options Template Overview, on page 6
Release 6.0.1
Flow Filter and IPFIX features were introduced.
This module includes these sections:
• Prerequisites for Configuring NetFlow, page 4
• Restrictions for Configuring NetFlow, page 4
• Information About Configuring NetFlow, page 4
• Netflow over BVI, page 12
• How to Configure NetFlow on Cisco IOS XR Software, page 12
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Configuring NetFlow
Prerequisites for Configuring NetFlow
• Configuration Examples for NetFlow, page 30
• Additional References, page 35
Prerequisites for Configuring NetFlow
To perform these configuration tasks, your Cisco IOS XR software system administrator must assign you to
a user group associated with a task group that includes the corresponding command task IDs. If you need
assistance with your task group assignment, contact your system administrator.
Restrictions for Configuring NetFlow
Consider these restrictions when configuring NetFlow in Cisco IOS XR software:
• A source interface must always be configured. If you do not configure a source interface, the exporter
will remain in a disabled state.
• Only export format Version 9 is supported.
• A valid record map name must always be configured for every flow monitor map.
• Only Sampled NetFlow is supported in the Satellite Gigabit Ethernet network interface. Destination-based
NetFlow Accounting (DBA) is not supported on this interface.
Tip
Do not use the management interface to export the NetFlow packets.
Information About Configuring NetFlow
NetFlow Overview
A flow is exported as part of a NetFlow export User Datagram Protocol (UDP) datagram under these
circumstances:
• The flow has been inactive or active for too long.
• The flow cache is getting full.
• One of the counters (packets and or bytes) has wrapped.
• The user forces the flow to export.
NetFlow export UDP datagrams are sent to an external flow collector device that provides NetFlow export
data filtering and aggregation. The export of data consists of expired flows and control information.
The NetFlow infrastructure is based on the configuration and use of these maps:
• Exporter map
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Configuring NetFlow
Exporter Map Overview
• Monitor map
• Sampler map
These maps are described in the sections that follow.
Exporter Map Overview
An exporter map contains user network specification and transport layer details for the NetFlow export packet.
The flow exporter-map command allows you to configure collector and version attributes. You can configure
these collector information:
• Export destination IP address
• DSCP value for export packet
• Source interface
• UDP port number (This is where the collector is listening for NetFlow packets.)
• Transport protocol for export packets
Note
In Cisco IOS XR Software, UDP is the only supported transport protocol for export packets.
Note
NetFlow export packets use the IP address that is assigned to the source interface. If the source interface
does not have an IP address assigned to it, the exporter will be inactive.
You can also configure these export version attributes:
• Template timeout
• Template data timeout
• Template options timeout
• Interface table timeout
• Sampler table timeout
Note
A single flow monitor map can support up to eight exporters.
Monitor Map Overview
A monitor map contains name references to the flow record map and flow exporter map. Monitor maps are
applied to an interface. You can configure these monitor map attributes:
• Number of entries in the flow cache
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Configuring NetFlow
Sampler Map Overview
• Type of cache (permanent or normal). Permanent caches do not have their entries removed from the
cache unless they are explicitly cleared by the user
• Active flow timeout
• Inactive flow timeout
• Update timeout
• Default timeouts
• Record type of packets sampled and collected
Note
Note
The record name specifies the type of packets that NetFlow samples as they pass through
the router. Currently, MPLS, IPv4, and IPv6 packet sampling is supported.
The active flow and inactive flow timeouts are associated with a normal cache type. The update timeout
is associated with the permanent cache type.
Sampler Map Overview
The sampler map specifies the rate at which packets (one out of n packets) are sampled. On high bandwidth
interfaces, applying NetFlow processing to every single packet can result in significant CPU utilization.
Sampler map configuration is typically geared towards such high speed interfaces.
The Policer rate is based on the network processor (NP). If netflow is applied on 1 NP, the aggregated maximum
flow packet processing rate per line card (LC) is 100k flow packets per second for the ASR 9000 Ethernet
LC and 200k flow packets per second for the ASR 9000 Enhanced Ethernet LC (irrespective of the direction
and the number of interface netflow that is applied in that NP). However, depending on the Netflow monitor
configuration distribution among NPs in an LC, policing of flow packet can take effect with an aggregated
rate that is less than the aggregated maximum flow packet processing rate. For example for the ASR 9000
Ethernet LC, if Netflow is applied to 1 interface per NP in a 4 NP LC, then the Policer rate per NP is 25K
packets per second.
Options Template Overview
NetFlow version 9 is a template-based version. The templates provide an extensible design to the record
format. This feature allows enhancements to NetFlow services without requiring concurrent changes to the
basic flow-record format. An options template is a special type of template record that is used to communicate
the format of data related to the NetFlow process. Rather than supplying information about IP flows, the
options are used to supply metadata about the NetFlow process itself. The sampler options template and the
interface options template are different forms of options templates. These two tables are exported by the
NetFlow process. From release 5.2.0, the NetFlow process will also export the VRF table.
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Configuring NetFlow
Options Template Overview
Sampler Table
The sampler options template consists of sampler tables. Similarly, the interface option templates consist of
interface tables. By enabling the options for sampler table and interface table, it becomes easier for the collector
to determine the information on data flow.
The sampler table consists of information on the active samplers. It is used by the collector to estimate the
sampling rate for each data flow. The sampler table consists of the following information for each sampler:
Field Name
Value
FlowSamplerID
This ID is assigned to the sampler. It is used by the
collector to retrieve information about the sampler
for a data flow record.
FlowSamplerMode
This field indicates the mode in which the sampling
has been performed. The default value for this field
is 1 for deterministic sampling and 2 for random
sampling.
FlowSamplerRandomInterval
This field indicates the rate at which the sampling is
performed.
SamplerName
This field indicates the name of the sampler.
Interface Table
The interface table consists of information on interfaces that are being monitored for data flow. By using this
information, the collector determines the names of interfaces associated with the data flow. The interface table
consists of the following information:
Field Name
Value
ingressInterface
This field indicates the SNMP index assigned to the
interface. By matching this value to the Ingress
interface and the Egress Interface in the data flow
record, the collector is able to retrieve the name of
the interface.
interfaceDescription
This field indicates the name of the interface.
VRF Table
The VRF table consists of mapping of VRF IDs to the VRF names. By using this information, the collector
determines the name of the required VRF. The VRF table consists of the following information:
Field Name
Value
ingressVRFID
The identifier of the VRF with the name in the
VRF-Name field.
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Configuring NetFlow
NetFlow Configuration Submodes
Field Name
Value
VRF-Name
The VRF name which has the VRFID value
ingressVRFID. The value "default" indicates that the
interface is not assigned explicitly to a VRF.
The data records contain ingressVRFID and egressVRFID fields as extra fields in each record. The values of
these fields are used to lookup the VRF Table to find the VRF names. A value 0 in these fields indicates that
the VRF is unknown.
The VRF table is exported at intervals specified by the optional timeout keyword that can be configured
manually. The default value is 1800 seconds.
NetFlow Configuration Submodes
In Cisco IOS XR Software, NetFlow map configuration takes place in map-specific submodes. Cisco IOS XR
Software supports these NetFlow map configuration submodes:
Note
The Cisco IOS XR Software allows you to issue most commands available under submodes as one single
command string from global configuration mode. For example, you can issue the record ipv4 command
from the flow monitor map configuration submode as follows:
RP/0/RSP0/CPU0:router(config)# flow monitor-map fmm
RP/0/RSP0/CPU0:router(config-fmm)# record ipv4
Alternatively, you can issue the same command from global configuration mode, as shown in the following
example:
RP/0/RSP0/CPU0:router(config)# flow monitor-map fmm record ipv4
Flow Exporter Map Configuration Submode
When you issue the flow exporter-map fem-name command in global configuration mode, the command-line
interface (CLI) prompt changes to “config-fem,” indicating that you have entered the flow exporter map
configuration submode.
In this sample output, the question mark (?) online help function displays all the commands available under
the flow exporter map configuration submode:
RP/0/RSP0/CPU0:router(config)# flow exporter-map fem
RP/0/RSP0/CPU0:router(config-fem)#
clear
clear
commit
describe
destination
do
dscp
exit
no
pwd
?
Clear the uncommitted configuration
Clear the configuration
Commit the configuration changes to running
Describe a command without taking real actions
Export destination configuration
Run an exec command
Specify DSCP value for export packets
Exit from this submode
Negate a command or set its defaults
Commands used to reach current submode
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Configuring NetFlow
NetFlow Configuration Submodes
root
show
source
transport
version
Exit to the global configuration mode
Show contents of configuration
Source interface
Specify the transport protocol for export packets
Specify export version parameters
Note
If you enter the version command, you enter the flow exporter map version configuration submode.
Note
A single flow monitor map can support up to eight exporters.
Flow Exporter Map Version Configuration Submode
When you issue the version v9 command in the flow exporter map configuration submode, the CLI prompt
changes to “config-fem-ver,” indicating that you have entered the flow exporter map version configuration
submode.
In this sample output, the question mark (?) online help function displays all the commands available under
the flow exporter map version configuration submode:
RP/0/RSP0/CPU0:router(config-fem)# version v9
RP/0/RSP0/CPU0:router(config-fem-ver)# ?
commit
describe
do
exit
no
options
show
template
Commit the configuration changes to running
Describe a command without taking real actions
Run an exec command
Exit from this submode
Negate a command or set its defaults
Specify export of options template
Show contents of configuration
Specify template export parameters
Flow Monitor Map Configuration Submode
When you issue the flow monitor-map map_name command in global configuration mode, the CLI prompt
changes to “config-fmm,” indicating that you have entered the flow monitor map configuration submode.
In this sample output, the question mark (?) online help function displays all the commands available under
the flow monitor map configuration submode:
RP/0/RSP0/CPU0:router(config)# flow monitor-map fmm
RP/0/RSP0/CPU0:router(config-fmm)# ?
cache
commit
describe
do
exit
exporter
no
record
show
Specify flow cache attributes
Commit the configuration changes to running
Describe a command without taking real actions
Run an exec command
Exit from this submode
Specify flow exporter map name
Negate a command or set its defaults
Specify a flow record map name
Show contents of configuration
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Configuring NetFlow
MPLS Flow Monitor with IPv4 and IPv6 Support
Sampler Map Configuration Submode
When you issue the sampler-map map_name command in global configuration mode, the CLI prompt changes
to “config-sm,” indicating that you have entered the sampler map configuration submode.
In this sample output, the question mark (?) online help function displays all the commands available under
the sampler map configuration submode:
RP/0/RSP0/CPU0:router(config)# sampler-map fmm
RP/0/RSP0/CPU0:router(config-sm)# ?
clear
Clear the uncommitted configuration
clear
Clear the configuration
commit
Commit the configuration changes to running
describe Describe a command without taking real actions
do
Run an exec command
exit
Exit from this submode
no
Negate a command or set its defaults
pwd
Commands used to reach current submode
random
Use random mode for sampling packets
root
Exit to the global configuration mode
show
Show contents of configuration
Enabling the NetFlow BGP Data Export Function
Use the bgp attribute-download command to enable NetFlow BGP routing attribute collection. The routing
attributes are then exported. When no routing attributes are collected, zeroes (0) are exported.
When BGP attribute download is enabled, BGP downloads the attribute information for prefixes (community,
extended community, and as-path) to the Routing Information Base (RIB) and Forwarding Information Base
(FIB). This enables FIB to associate the prefixes with attributes and send the NetFlow statistics along with
the associated attributes.
MPLS Flow Monitor with IPv4 and IPv6 Support
Cisco IOS XR Software supports the NetFlow collection of MPLS packets. It also supports the NetFlow
collection of MPLS packets carrying IPv4, IPv6, or both IPv4 and IPv6 payloads.
MPLS Cache Reorganization to Support Both IPv4 and IPv6
In Cisco IOS XR Software, at a time, you can have only one MPLS flow monitor running on an interface. If
you apply an additional MPLS flow monitor to the interface, the new flow monitor overwrites the existing
one.
At a time, you can apply only one flow monitor on an interface per direction. You can apply either the same
flow monitor to an interface in both directions, or each direction can have its own flow monitor.
You can configure the MPLS flow monitor to collect IPv4 fields, IPv6 fields, or IPv4-IPv6 fields. IPv4-IPv6
configuration collects both IPv4 and IPv6 addresses using one MPLS flow monitor. IPv4 configuration collects
only IPv4 addresses. IPv6 configuration collects only IPv6 addresses.
The MPLS flow monitor supports up to 1,000,000 cache entries. NetFlow entries include these types of fields:
• IPv4 fields
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Configuring NetFlow
Destination-based NetFlow Accounting
• IPv6 fields
• MPLS with IPv4 fields
• MPLS with IPv6 fields
The maximum number of bytes per NetFlow cache entry is as follows:
• IPv4–88 bytes per entry
• MPLS–88 bytes per entry
• IPv6–108 bytes per entry
• MPLS with IPv4 fields–108 bytes per entry
• MPLS with IPv6 fields–128 bytes per entry
Note
The different types of NetFlow entries are stored in separate caches. Consequently, the number of NetFlow
entries on a line card can significantly impact the amount of available memory on the line card. Also, even
though the sampling rate for IPv6 is the same as the sampling rate for IPv4, the CPU utilization for IPv6
is higher due to the longer keys used by the IPv6 fields.
MPLS Packets with IPv6 Flows
The collection of IPv6 flows in MPLS packets is an option. The CPU uses 128 bytes for each IPv6 field. IPv6
flows may contain these types of information:
• Source IP address
• Destination IP address
• Traffic class value
• Layer 4 protocol number
• Layer 4 source port number
• Layer 4 destination port number
• Flow ID
• Header option mask
To collect the IPv6 fields in MPLS packets, you must activate the MPLS record type, ipv6-fields by running
the record mpls ipv6-fields command. You can also specify the number of labels to be used for aggregation
with this command.
Destination-based NetFlow Accounting
Destination-based NetFlow accounting (DBA) is a usage-based billing application that tracks and records
traffic according to its destination. It enables service providers to do destination-specific accounting and
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Configuring NetFlow
Netflow over BVI
billing. The destination-based NetFlow accounting record includes the destination peer autonomous system
(AS) number and the BGP next-hop IP address.
Note
When an EBGP neighborship is established towards a directly connected peer (neighborship toward's the
Peer routers Global IPv6 address configured on the directly connected interface), the EBGPv6 peer will
advertise both the Link Local Next Hop (LL NH) and the Global Next Hop.
IPv4 DBA is already supported in CRS. In Release 4.3.1, the support for IPv6 DBA support is added.
For more information about the IPv6 Destination-based NetFlow Accounting feature, see the Configuring
NetFlow module in the Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide.For
complete command reference of IPv6 Destination-based NetFlow Accounting commands, see the NetFlow
Commandschapter in the Cisco ASR 9000 Series Aggregation Services Router Netflow Command Reference.
Netflow over BVI
NetFlow monitoring on Bridge-Group Virtual Interface (BVI) enables traffic monitoring, capacity planning,
accounting, security threat detection and billing.
For more information about the NetFlow over BVI feature, see the Configuring NetFlow module in the
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide.For complete command
reference of NetFlow, see the NetFlow Commands chapter in the Cisco ASR 9000 Series Aggregation Services
Router Netflow Command Reference.
How to Configure NetFlow on Cisco IOS XR Software
The steps that follow provide a general overview of NetFlow configuration:
SUMMARY STEPS
1. Create and configure an exporter map.
2. Create and configure a monitor map and a sampler map.
3. Apply the monitor map and sampler map to an interface.
DETAILED STEPS
Step 1
Step 2
Step 3
Create and configure an exporter map.
Create and configure a monitor map and a sampler map.
Note
The monitor map must reference the exporter map you created in Step 1. If you do not apply an exporter-map
to the monitor-map, the flow records are not exported, and aging is done according to the cache parameters
specified in the monitor-map.
Apply the monitor map and sampler map to an interface.
These steps are described in detail in these sections:
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Configuring NetFlow
Configuring an Exporter Map
Configuring an Exporter Map
Configure an exporter map and apply it to the monitor map with the flow monitor-map map_name exporter
map_name command. You can configure the exporter map prior to configuring the monitor map, or you can
configure the monitor map first and then configure and apply an exporter map later on.
Note
Cisco IOS XR Software supports the configuration of a single collector only in the exporter map.
The steps that follow describe how to create and configure an exporter map and enable exporting of the sampler
table or the interface table.
SUMMARY STEPS
1. configure
2. flow exporter-map map_name
3. destination hostname_or_IP_address
4. dscp dscp_value
5. source type interface-path-id
6. transport udp port
7. version v9
8. options {interface-table | sampler-table | vrf-table} [timeout seconds]
9. template [data | options] timeout seconds
10. commit
11. exit
12. exit
13. show flow exporter-map map_name
DETAILED STEPS
Command or Action
Purpose
Step 1
configure
Step 2
flow exporter-map map_name
Creates an exporter map, configures the exporter map name,
and enters flow exporter map configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# flow
exporter-map fem
Step 3
destination hostname_or_IP_address
Configures the export destination for the flow exporter map.
The destination can be a hostname or an IPv4 address.
Example:
RP/0/RSP0/CPU0:router(config-fem)# destination
170.1.1.11
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Configuring an Exporter Map
Step 4
Command or Action
Purpose
dscp dscp_value
(Optional) Specifies the differentiated services codepoint
(DSCP) value for export packets. Replace the dscp_value
argument with a value in the range from 0 through 63.
Example:
RP/0/RSP0/CPU0:router(config-fem)# dscp 55
Step 5
source type interface-path-id
Specifies a source interface, in the format type
interface-path-id.
Example:
RP/0/RSP0/CPU0:router(config-fem)# source
gigabitEthernet 0/0/0/0
Step 6
transport udp port
Example:
(Optional) Specifies the destination port for UDP packets.
Replace port with the destination UDP port value, in the
range from 1024 through 65535.
RP/0/RSP0/CPU0:router(config-fem)# transport
udp 9991
Step 7
version v9
(Optional) Enters flow exporter map version configuration
submode.
Example:
RP/0/RSP0/CPU0:router(config-fem-ver)# version
v9
Step 8
options {interface-table | sampler-table | vrf-table} (Optional) Configures the export timeout value for the
sampler table. Replace seconds with the export timeout value,
[timeout seconds]
in the range from 1 through 604800 seconds.
Example:
Default is 1800 seconds.
RP/0/RSP0/CPU0:router(config-fem-ver)# options
sampler-table timeout 2000
Step 9
template [data | options] timeout seconds
Example:
(Optional) Configures the export period for data packets.
Replace seconds with the export timeout value, in the range
from 1 through 604800 seconds.
RP/0/RSP0/CPU0:router(config-fem-ver)#
template data timeout 10000
Step 10
commit
Step 11
exit
Exits flow exporter map version configuration submode.
Example:
RP/0/RSP0/CPU0:router(config-fem-ver)# exit
Step 12
exit
Exits global configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# exit
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Configuring NetFlow
Configuring a Sampler Map
Step 13
Command or Action
Purpose
show flow exporter-map map_name
Displays exporter map data.
Example:
RP/0/RSP0/CPU0:router# show flow exporter-map
fem
Configuring a Sampler Map
Perform these steps to create and configure a sampler map.
SUMMARY STEPS
1. configure
2. sampler-map map_name
3. random 1 out-of sampling_interval
4. commit
5. exit
6. exit
7. show sampler-map map_name
DETAILED STEPS
Command or Action
Purpose
Step 1
configure
Step 2
sampler-map map_name
Creates a sampler map and enters sampler map configuration
mode.
Example:
Keep the following in mind when configuring a sampler
map:
RP/0/RSP0/CPU0:router(config)# sampler-map sm
RP/0/RSP0/CPU0:router(config-sm)#
Step 3
random 1 out-of sampling_interval
Example:
•
Configures the sampling interval to use random mode for
sampling packets. Replace the sampling_interval argument
with a number, in the range from 1 through 65535 units.
RP/0/RSP0/CPU0:router(config-sm)# random 1
out-of 65535
Step 4
commit
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Configuring NetFlow
Configuring a Monitor Map
Step 5
Command or Action
Purpose
exit
Exits sampler map configuration mode and enters the global
configuration mode.
Example:
RP/0/RSP0/CPU0:router(config-sm)# exit
Step 6
Exits the global configuration mode and enters EXEC mode.
exit
Example:
RP/0/RSP0/CPU0:router(config)# exit
Step 7
show sampler-map map_name
Displays sampler map data.
Example:
RP/0/RSP0/CPU0:router# show sampler-map fsm
Configuring a Monitor Map
Perform these steps to create and configure a monitor map.
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Configuring NetFlow
Configuring a Monitor Map
SUMMARY STEPS
1. configure
2. flow monitor-map map_name
3. Do one of the following:
• record ipv4
• record ipv4 [peer as]
• record ipv6
• record mpls [labels number]
• record mpls [ipv4-fields] [labels number]
• record mpls [ipv6-fields] [labels number]
• record mpls [ipv4-ipv6-fields] [labels number]
4. cache entries number
5. cache permanent
6. cache timeout {active timeout_value | inactive timeout_value | update timeout_value}
7. exporter map_name
8. commit
9. exit
10. exit
11. show flow monitor-map map_name
DETAILED STEPS
Command or Action
Purpose
Step 1
configure
Step 2
flow monitor-map map_name
Creates a monitor map and configures a monitor map name and enters
flow monitor map configuration submode.
Example:
RP/0/RSP0/CPU0:router(config)# flow
monitor-map fmm
RP/0/RSP0/CPU0:router(config-fmm)#
Step 3
Do one of the following:
Configures the flow record map name for IPv4, IPv6, or MPLS.
• record ipv4
• record ipv4 [peer as]
• record ipv6
• record mpls [labels number]
• Use the record ipv4 command to configure the flow record map
name for IPv4. By default, you collect and export the originating
autonomous system (AS) numbers.
• Use the record ipv4 [peer-as] command to record peer AS. Here,
you collect and export the peer AS numbers.
• record mpls [ipv4-fields] [labels
number]
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Configuring NetFlow
Configuring a Monitor Map
Command or Action
• record mpls [ipv6-fields] [labels
number]
• record mpls [ipv4-ipv6-fields] [labels
number]
Example:
RP/0/RSP0/CPU0:router(config-fmm)#
record ipv4
Purpose
Note
Ensure that the bgp attribute-download command is
configured. Else, no AS is collected when the record ipv4 or
record ipv4 peer-as command is configured.
• Use the record ipv6 command to configure the flow record map
name for IPv6.
• Use the record mpls labels command with the number argument
to specify the number of labels that you want to aggregate. By
default, MPLS-aware NetFlow aggregates the top six labels of the
MPLS label stack. The maximum value is 6.
• Use the record mpls ipv4-fields command to collect IPv4 fields
in the MPLS-aware NetFlow.
• Use the record mpls ipv6-fields command to collect IPV6 fields
in the MPLS-aware NetFlow.
• Use the record mpls ipv4-ipv6-fields command to collect IPv4
and IPv6 fields in the MPLS-aware NetFlow.
Step 4
cache entries number
Example:
RP/0/RSP0/CPU0:router(config-fmm)# cache
entries 10000
Step 5
cache permanent
(Optional) Configures the number of entries in the flow cache. Replace
the number argument with the number of flow entries allowed in the
flow cache, in the range from 4096 through 1000000.
The default number of cache entries is 65535.
(Optional) Disables removal of entries from flow cache.
Example:
RP/0/RSP0/CPU0:router(config-fmm)# flow
monitor-map fmm cache permanent
Step 6
cache timeout {active timeout_value | inactive (Optional) Configures the active, inactive, or update flow cache timeout
value.
timeout_value | update timeout_value}
Example:
RP/0/RSP0/CPU0:router(config-fmm)# cache
timeout inactive 1000
• The default timeout value for the inactive flow cache is 15 seconds.
• The default timeout value for the active flow cache is 1800 seconds.
• The default timeout value for the update flow cache is 1800
seconds.
Note
Step 7
exporter map_name
The update timeout_value keyword argument is used for
permanent caches only. It specifies the timeout value that is
used to export entries from permanent caches. In this case, the
entries are exported but remain the cache.
Associates an exporter map with a monitor map.
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Configuring NetFlow
Applying a Monitor Map and a Sampler Map to an Interface
Command or Action
Purpose
Note
Example:
A single flow monitor map can support up to eight
exporters.
RP/0/RSP0/CPU0:router(config-fmm)#
exporter fem
Step 8
commit
Step 9
exit
Exits flow monitor map configuration submode.
Example:
RP/0/RSP0/CPU0:router(config-fmm)# exit
Step 10
Exits global configuration mode.
exit
Example:
RP/0/RSP0/CPU0:router(config)# exit
Step 11
show flow monitor-map map_name
Displays flow monitor map data.
Example:
RP/0/RSP0/CPU0:router# show flow
monitor-map fmm
Applying a Monitor Map and a Sampler Map to an Interface
Perform these steps to apply a monitor map and a sampler map to an interface.
SUMMARY STEPS
1. configure
2. interface type number
3. flow [ipv4 | ipv6 | mpls] monitor monitor_map sampler sampler_map {egress | ingress}
4. commit
DETAILED STEPS
Command or Action
Step 1
Purpose
configure
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Configuring NetFlow
Clearing NetFlow Data
Step 2
Command or Action
Purpose
interface type number
Enters interface configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# interface
gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)#
Step 3
flow [ipv4 | ipv6 | mpls] monitor monitor_map sampler Associates a monitor map and a sampler map with an
interface.
sampler_map {egress | ingress}
Example:
RP/0/RSP0/CPU0:router(config-if)# flow ipv4
monitor fmm sampler fsm egress
Step 4
Enter ipv4 to enable IPV4 NetFlow on the specified
interface. Enter ipv6 to enable IPV6 NetFlow on the
specified interface. Enter mpls to enable MPLS-aware
NetFlow on the specified interface.
commit
Clearing NetFlow Data
Perform these steps to clear flow exporter map and flow monitor map data.
SUMMARY STEPS
1. clear flow exporter [exporter_name] {restart | statistics} location node-id
2. clear flow monitor [monitor_name] cache [force-export | statistics] location node-id}
DETAILED STEPS
Command or Action
Step 1
Purpose
clear flow exporter [exporter_name] {restart | statistics} Clears the flow exporter data.
location node-id
Specify the statistics option to clear exporter statistics. Specify
the restart option to export all of the templates that are currently
Example:
configured on the specified node.
RP/0/RSP0/CPU0:router# clear flow exporter
statistics location 0/0/CPU0
Step 2
clear flow monitor [monitor_name] cache [force-export Clears the flow monitor data.
| statistics] location node-id}
Specify the statistics option to clear cache statistics. Specify
the force-export option to export the data from cache to server
Example:
first and then clear the entries from cache.
RP/0/RSP0/CPU0:router# clear flow monitor cache
force-export location 0/0/CPU0
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Configuring NetFlow
Configuring NetFlow Collection of MPLS Packets with IPv6 Fields
Configuring NetFlow Collection of MPLS Packets with IPv6 Fields
Perform these steps to configure NetFlow collection of MPLS packets with IPv6 fields.
SUMMARY STEPS
1. configure
2. flow exporter-map map_name
3. version v9
4. options {interface-table | sampler-table} [timeout seconds]
5. template [data | options] timeout seconds
6. exit
7. transport udp port
8. source type interface-path-id
9. destination hostname_or_IP_address
10. exit
11. flow monitor-map map_name
12. record mpls [ipv4-ipv6-fields] [labels number]
13. exporter map_name
14. cache entries number
15. cache timeout {active timeout_value | inactive timeout_value | update timeout_value}
16. cache permanent
17. exit
18. sampler-map map_name
19. random 1 out-of sampling_interval
20. exit
21. interface type number
22. flow [ipv4 | ipv6 | mpls] monitor monitor_map sampler sampler_map {egress | ingress}
23. commit
24. exit
25. exit
26. show flow monitor-map map_name
27. show flow exporter-map map_name
DETAILED STEPS
Command or Action
Step 1
Purpose
configure
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Configuring NetFlow
Configuring NetFlow Collection of MPLS Packets with IPv6 Fields
Step 2
Command or Action
Purpose
flow exporter-map map_name
Creates an exporter map, configures the exporter map name, and
enters flow exporter map configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# flow
exporter-map exp1
Step 3
version v9
(Optional) Enters flow exporter map version configuration
submode.
Example:
RP/0/RSP0/CPU0:router(config-fem)# version
v9
Step 4
options {interface-table | sampler-table} [timeout (Optional) Configures the export timeout value for the interface
table or the sampler table. Replace seconds with the export timeout
seconds]
value, in the range from 1 through 604800 seconds. The default
is 1800 seconds for both the interface table and the sample table.
Example:
RP/0/RSP0/CPU0:router(config-fem-ver)#
options interface-table timeout 300
Step 5
Step 6
template [data | options] timeout seconds
You must perform this step twice to configure the export timeout
value for both an interface table and a sample table.
Example:
(Optional) Configures the export period for data packets or options
packets. Replace seconds with the export timeout value, in the
range from 1 through 604800 seconds.
RP/0/RSP0/CPU0:router(config-fem-ver)#
template data timeout 300
You must perform this step twice to configure the export period
for both data packets and options packets.
exit
Exits flow exporter map version configuration mode, and enters
flow exporter map configuration mode.
Example:
RSP0/CPU0:router(config-fem-ver)# exit
Step 7
transport udp port
Example:
(Optional) Specifies the destination port for UDP packets. Replace
port with the destination UDP port value, in the range from 1024
through 65535.
RP/0/RSP0/CPU0:router(config-fem)#
transport udp 12515
Step 8
source type interface-path-id
Specifies a source interface, in the format type interface-path-id.
For example:
Example:
RP/0/RSP0/CPU0:router(config-fem)# source
Loopback0
Step 9
destination hostname_or_IP_address
POS 0/1/0/1 or Loopback0
Configures the export destination for the flow exporter map. The
destination can be a hostname or an IPv4 address.
Example:
RP/0/RSP0/CPU0:router(config-fem)#
destination 170.1.1.11
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Configuring NetFlow
Configuring NetFlow Collection of MPLS Packets with IPv6 Fields
Step 10
Command or Action
Purpose
exit
Exits flow exporter map configuration mode, and enters global
configuration mode.
Example:
RP/0/RSP0/CPU0:router(config-fem)# exit
Step 11
flow monitor-map map_name
Creates a monitor map and configures a monitor map name and
enters flow monitor map configuration submode.
Example:
RP/0/RSP0/CPU0:router(config)# flow
monitor-map MPLS-IPv6-fmm
Step 12
record mpls [ipv4-ipv6-fields] [labels number]
Example:
Configures the flow record map name for IPv4, IPv6, or MPLS.
Use the ipv4-ipv6-fields keyword to collect IPv4 and IPv6 fields
in an MPLS-aware NetFlow.
RP/0/RSP0/CPU0:router(config-fmm)# record
mpls ipv6-fields labels 3
Step 13
exporter map_name
Associates an exporter map with a monitor map.
Note
Example:
A single flow monitor map can support up to eight
exporters.
RP/0/RSP0/CPU0:router(config-fmm)# exporter
exp1
Step 14
cache entries number
(Optional) Configures the number of entries in the flow cache.
Replace the number argument with the number of flow entries
allowed in the flow cache, in the range from 4096 through
1000000.
Example:
Step 15
RP/0/RSP0/CPU0:router(config-fmm)# cache
entries 10000
The default number of cache entries is 65535.
cache timeout {active timeout_value | inactive
timeout_value | update timeout_value}
(Optional) Configures the active, inactive, or update flow cache
timeout value.
• The default timeout value for the inactive flow cache is 15
seconds.
Example:
RP/0/RSP0/CPU0:router(config-fmm)# cache
timeout inactive 1800
• The default timeout value for the active flow cache is 1800
seconds.
• The default timeout value for the update flow cache is 1800
seconds.
Note
Note
The inactive and active keywords are not applicable to
permanent caches.
The update keyword is used for permanent caches only.
It specifies the timeout value that is used to export entries
from permanent caches. In this case, the entries are
exported but remain the cache.
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Configuring NetFlow
Configuring NetFlow Collection of MPLS Packets with IPv6 Fields
Step 16
Command or Action
Purpose
cache permanent
(Optional) Disables the removal of entries from flow cache.
Example:
RP/0/RSP0/CPU0:router(config-fmm)# flow
monitor-map fmm cache permanent
Step 17
exit
Exits flow monitor map configuration submode.
Example:
RP/0/RSP0/CPU0:router(config-fmm)# exit
Step 18
sampler-map map_name
Creates a sampler map and enters sampler map configuration
mode.
Example:
Keep the following in mind when configuring a sampler map:
RP/0/RSP0/CPU0:router(config)# sampler-map
fsm
RP/0/RSP0/CPU0:router(config-sm)#
Step 19
random 1 out-of sampling_interval
Example:
Configures the sampling interval to use random mode for sampling
packets. Replace the sampling_interval argument with a number,
in the range from 1 through 65535 units.
RP/0/RSP0/CPU0:router(config-sm)# random 1
out-of 65535
Step 20
exit
Exits sampler map configuration mode and enters global
configuration mode.
Example:
RP/0/RSP0/CPU0:router(config-sm)#exit
Step 21
interface type number
Enters interface configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# interface
gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)#
Step 22
flow [ipv4 | ipv6 | mpls] monitor monitor_map
sampler sampler_map {egress | ingress}
Example:
RP/0/RSP0/CPU0:router(config-if)# flow ipv4
monitor MPLS-IPv6-fmm sampler fsm egress
Step 23
commit
Step 24
exit
Associates a monitor map and a sampler map with an interface.
Enter ipv4 to enable IPV4 NetFlow on the specified interface.
Enter ipv6 to enable IPV6 NetFlow on the specified interface.
Enter mpls to enable MPLS-aware NetFlow on the specified
interface.
Exits interface configuration submode for the Ethernet interface.
Example:
RP/0/RSP0/CPU0:router(config-if)# exit
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Configuring NetFlow
Configuring Destination-based NetFlow Accounting
Step 25
Command or Action
Purpose
exit
Exits global configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# exit
Step 26
show flow monitor-map map_name
Displays flow monitor map data.
Example:
RP/0/RSP0/CPU0:router# show flow
monitor-map fmm
Step 27
show flow exporter-map map_name
Displays exporter map data.
Example:
RP/0/RSP0/CPU0:router# show flow
exporter-map fem
Configuring Destination-based NetFlow Accounting
Perform these tasks to configure destination-based NetFlow accounting.
SUMMARY STEPS
1. configure
2. flow monitor-map map_name
3. record destination-tos {ipv4 | ipv6 } [destination]
4. exit
5. interface type interface-path-id
6. flow {ipv4 | ipv6 | }monitor map-name { ingress }
7. commit
8. show flow monitor-map map_name
DETAILED STEPS
Command or Action
Purpose
Step 1
configure
Step 2
flow monitor-map map_name
Creates a monitor map and configures a monitor map name
and enters flow monitor map configuration submode.
Example:
RP/0/RSP0/CPU0:router(config)# flow monitor-map
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Configuring NetFlow
Configuring Destination-based NetFlow Accounting
Command or Action
Purpose
map1
RP/0/RSP0/CPU0:router(config-fmm)#
Step 3
record destination-tos {ipv4 | ipv6 } [destination]
Example:
Configures the flow record for an IPv4 or IPv6
destination-based NetFlow accounting record. The
destination keyword specifies that the record is for IPv4 or
IPv6 destination-based NetFlow accounting.
RP/0/RSP0/CPU0:router(config-fmm)# record ipv4
destination-tos
Example:
RP/0/RSP0/CPU0:router(config-fmm)# record ipv6
destination
Step 4
exit
Exits flow monitor map mode and enters the global
configuration mode.
Example:
RP/0/RSP0/CPU0:router(config-fmm)# exit
Step 5
interface type interface-path-id
Interface type and physical interface-path-id in the format
type rack/slot/module/port.
Example:
type—POS, Ethernet, ATM, etc.
RP/0/RSP0/CPU0:router(config)# interface POS
0/1/0/0
rack—Chassis number of the rack.
slot—Physical slot number of the line card or modular
services card.
module—Module number. A physical layer interface module
(PLIM) is always 0.
port—Physical port number of the interface.
Step 6
flow {ipv4 | ipv6 | }monitor map-name { ingress }
Configures an IPv4 or IPv6 flow monitor for the ingress
direction and assigns the name of the monitor.
Example:
RP/0/RSP0/CPU0:router(config-if)# flow ipv4
monitor monitor1 ingress
Example:
RP/0/RSP0/CPU0:router(config-if)# flow ipv6
monitor monitor1 ingress
Step 7
commit
Step 8
show flow monitor-map map_name
Verifies monitor map data.
Example:
RP/0/RSP0/CPU0:router# show flow monitor-map
map1
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Configuring NetFlow
Configuring Netflow over BVI
Configuring Netflow over BVI
Perform this task to configure Neflow over BVI.
Note
For information on configuring the exporter, monitor, and sampler, see Configuring an Exporter Map,
Configuring a Monitor Map, and Configuring a Sampler Map.
SUMMARY STEPS
1. configure
2. l2vpn
3. bridge group bg1
4. bridge-domain bd1
5. interface TenGigE0/0/0/0
6. exit
7. interface Bundle-Ether100
8. exit
9. routed interface BVI1
10. interface BVI1
11. ipv4 address 11.11.11.11 255.255.255.0
12. flow ipv4 monitor FMM sampler SAMP ingress
13. flow ipv4 monitor FMM sampler SAMP egress
14. flow ipv6 monitor FMM-v6 sampler SAMP ingress
15. flow ipv6 monitor FMM-v6 sampler SAMP egress
16. commit
DETAILED STEPS
Command or Action
Step 1
configure
Step 2
l2vpn
Purpose
Enters L2VPN configuration mode.
Example:
RP/0/RSP0/CPU0:router(config)# l2vpn
Step 3
Configures bridge group.
bridge group bg1
Example:
RP/0/RSP0/CPU0:router(config-l2vpn)# bridge group
bg1
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Configuring NetFlow
Configuring Netflow over BVI
Step 4
Command or Action
Purpose
bridge-domain bd1
Configures bridge domain.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg)# bridge-domain
bd1
Step 5
interface TenGigE0/0/0/0
Assigns TenGigabitEthernet/IEEE 802.3 interface
to the configured bridge domain.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# interface
TenGigE0/0/0/0
Step 6
exit
Exits the interface sub-mode.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# exit
Step 7
interface Bundle-Ether100
Assigns aggregated ethernet interface to the
configured bridge domain.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# interface
Bundle-Ether100
Step 8
exit
Exits the interface sub-mode.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# exit
Step 9
routed interface BVI1
Assigns Bridge-Group Virtual Interface to the
configured bridge domain.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# routed
interface BVI1
Step 10
interface BVI1
Enters interface configuration mode.
Example:
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# interface
BVI1
Step 11
ipv4 address 11.11.11.11 255.255.255.0
Configures the IPv4 address of the interface.
Example:
RP/0/RSP0/CPU0:router(config-if)# ipv4 address
11.11.11.11 255.255.255.0
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Configuring NetFlow
ASR 9000 Ethernet LC Netflow
Step 12
Command or Action
Purpose
flow ipv4 monitor FMM sampler SAMP ingress
Configures IPv4 flow monitor, specifies a sampler
for packets, and applies flow monitor on incoming
packets.
Example:
RP/0/RSP0/CPU0:router(config-if)# flow ipv4 monitor
FMM sampler SAMP ingress
Step 13
flow ipv4 monitor FMM sampler SAMP egress
Example:
Configures IPv4 flow monitor, specifies a sampler
for packets, and applies flow monitor on outgoing
packets.
RP/0/RSP0/CPU0:router(config-if)# flow ipv4 monitor
FMM sampler SAMP egress
Step 14
flow ipv6 monitor FMM-v6 sampler SAMP ingress
Example:
Configures IPv6 flow monitor, specifies a sampler
for packets, and applies flow monitor on incoming
packets.
RP/0/RSP0/CPU0:router(config-if)# flow ipv6 monitor
FMM-v6 sampler SAMP ingress
Step 15
flow ipv6 monitor FMM-v6 sampler SAMP egress
Example:
Configures IPv6 flow monitor, specifies a sampler
for packets, and applies flow monitor on outgoing
packets.
RP/0/RSP0/CPU0:router(config-if)# flow ipv6 monitor
FMM-v6 sampler SAMP egress
Step 16
commit
ASR 9000 Ethernet LC Netflow
ASR 9000 Ethernet LC Netflow exports using only the V9 (Version 9) format. V9 is the most flexible NetFlow
export. This format is flexible and extensible. It provides the flexibility to support new fields and record types.
Supported features
• Flow monitor type of IPv4, IPv6, and MPLS can all be configured to an interface per direction.
• Sampled Netflow. There is no support for full mode sampling.
• Non-deterministic Random Sampling Algorithm.
• Different traffic types, including unicast and multicast traffic.
Punt path policer rate
In order to achieve the maximum flow processing without overloading the LC CPU, all flow packets that are
punted from each Network Processor are policed. This is done to avoid overloading the CPU. The aggregate
punt policer rate is 100 Kpps for the ASR 9000 Ethernet LC. To avoid having flow packets arrive at the CPU
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Configuration Examples for NetFlow
at a huge rate, the punt path policer needs to be applied on all NPs that have the netflow feature applied on
them.
The Punt path policer rate can be calculated in following way:
Calculating Punt path policer rate
The policer rate of each NP_NetflowMonitor is 100k, where NP_NetflowMonitor is NP that has Netflow
monitor configured to its associated interfaces; or any of its associated interfaces are member of a bundle
interfaces or bundle sub-interfaces that has Netflow monitor applied.
Determining NP for NP_NetflowMonitor or non - NP_NetflowMonitor:
1 If any of its associated interface or sub-interface has any flow monitor applied, then it is
NP_NetflowMonitor.
2 If any of its interfaces is a member of a bundle interface or bundle sub-interface that has Netflow monitor
configured, the NP is considered as non- NP_NetflowMonitor.
ASR 9000 Ethernet Line Card Features
• Ingress and egress NetFlow (IPv4, IPv6, MPLS) on L3 physical interface, L3-sub-interface, L3-Bundle
interface, and L3 bundle sub-interface.
• Configurable Sampling Rate 1:1 ~ 1: 65535
• Up to 4 Sampling Rates (or Intervals) per line card.
• Up to 8k (Large memory line card) or 4k (Small Memory line card) interfaces/subinterfaces
• Configuration with flow monitor per Network Processor (NP).
• Maximum aggregate NetFlow processing rate of 50k flow packets per seconds per line card, enforced
by NetFlow Punt Policer on each NP.
• NetFlow processing of 100Kpps, with CPU utilization not exceeding 50%.
• Combined NetFlow processing of 100kpps per line card for the ASR 9000 Ethernet Line Cards and
200kpps per line card for the ASR 9000 Enhanced Ethernet Line Cards.
• Up to 4 flow exporters per flow monitor.
• Exporting packet rates of up to 100k flows per second.
Configuration Examples for NetFlow
These examples show NetFlow configurations:
Sampler Map: Example
This example shows how to create a new sampler map called “fsm1,” which samples 1 out of 65535 packets:
RP/0/RSP0/CPU0:router# sampler-map fsm1
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Exporter Map: Example
RP/0/RSP0/CPU0:router(config-sm)# random 1 out-of 65535
RP/0/RSP0/CPU0:router(config)# exit
Exporter Map: Example
This example shows how to create a new flow exporter map called “fem1,” which uses the version 9 (V9)
export format for NetFlow export packets. The data template flow-set is inserted into the V9 export packets
once every 10 minutes, and the options interface table flow-set is inserted into the V9 export packet. The
export packets are sent to the flow collector destination 10.1.1.1, where the source address is identical to the
interface IP address of Loopback 0. The UDP destination port is 1024, and the DSCP value is 10:
RP/0/RSP0/CPU0:router(config)# flow exporter-map fem1
RP/0/RSP0/CPU0:router(config-fem)# destination 10.1.1.1
RP/0/RSP0/CPU0:router(config-fem)# source Loopback 0
RP/0/RSP0/CPU0:router(config-fem)# transport udp 1024
RP/0/RSP0/CPU0:router(config-fem)# dscp 10
RP/0/RSP0/CPU0:router(config-fem)# exit
RP/0/RSP0/CPU0:router(config-fem)# version v9
RP/0/RSP0/CPU0:router(config-fem-ver)# template data timeout 600
RP/0/RSP0/CPU0:router(config-fem-ver)# options interface-table
RP/0/RSP0/CPU0:router(config-fem-ver)# exit
This example shows how to create a new flow exporter map called “fem1,” which uses the version 9 (V9)
export format for the NetFlow export packets. The data template flow-set is inserted into the V9 export packets
once every 10 minutes, and the options sampler table flow-set is inserted into the V9 export packet. The export
packets are sent to the flow collector destination 10.1.1.1, where the source address is identical to the interface
IP address of Loopback 0. The UDP destination port is 1024, and the DSCP value is 10:
RP/0/RSP0/CPU0:router(config)# flow exporter-map fem1
RP/0/RSP0/CPU0:router(config-fem)# destination 10.1.1.1
RP/0/RSP0/CPU0:router(config-fem)# source Loopback 0
RP/0/RSP0/CPU0:router(config-fem)# transport udp 1024
RP/0/RSP0/CPU0:router(config-fem)# dscp 10
RP/0/RSP0/CPU0:router(config-fem)# exit
RP/0/RSP0/CPU0:router(config-fem)# version v9
RP/0/RSP0/CPU0:router(config-fem-ver)# template data timeout 600
RP/0/RSP0/CPU0:router(config-fem-ver)# options sampler-table
RP/0/RSP0/CPU0:router(config-fem-ver)# exit
Flow Monitor Map: Examples
This example shows how to create a new flow monitor map with name “fmm1”. This flow monitor map
references the flow exporter map “fem1,” and sets the flow cache attributes to 10000 cache entries. The active
entries from the cache are aged every 30 seconds, while the inactive entries from the cache are aged every 15
seconds. The record map for this monitor map is IPv4:
RP/0/RSP0/CPU0:router(config)# flow monitor-map fmm1
RP/0/RSP0/CPU0:router(config-fmm)# record ipv4
RP/0/RSP0/CPU0:router(config-fmm)# exporter fem1
RP/0/RSP0/CPU0:router(config-fmm)# cache entries 10000
RP/0/RSP0/CPU0:router(config-fmm)# cache timeout active 30
RP/0/RSP0/CPU0:router(config-fmm)# cache timeout inactive 15
RP/0/RSP0/CPU0:router(config-fmm)# exit
This example shows how to apply the flow monitor “fmm1”and the sampler “fsm1” to the TenGigE 0/0/0/0
interface in the ingress direction:
RP/0/RSP0/CPU0:router(config)# interface TenGigE 0/0/0/0
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MPLS Flow Monitor with IPv4 and IPv6 Support: Examples
RP/0/RSP0/CPU0:router(config-if)# flow ipv4 monitor fmm1 sampler fsm1 ingress
RP/0/RSP0/CPU0:router(config-if)# exit
This example shows how to configure the NetFlow monitor to collect MPLS packets with IPv6 fields:
RP/0/RSP0/CPU0:router# config
RP/0/RSP0/CPU0:router(config)# flow exporter-map exp1
RP/0/RSP0/CPU0:router(config-fem)# version v9
RP/0/RSP0/CPU0:router(config-fem-ver)# options interface-table timeout 300
RP/0/RSP0/CPU0:router(config-fem-ver)# options sampler-table timeout 300
RP/0/RSP0/CPU0:router(config-fem-ver)# template data timeout 300
RP/0/RSP0/CPU0:router(config-fem-ver)# template options timeout 300
RP/0/RSP0/CPU0:router(config-fem-ver)# exit
RP/0/RSP0/CPU0:router(config-fem)# transport udp 12515
RP/0/RSP0/CPU0:router(config-fem)# source Loopback0
RP/0/RSP0/CPU0:router(config-fem)# destination 170.1.1.11
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# flow monitor-map MPLS-IPv6-fmm
RP/0/RSP0/CPU0:router(config-fmm)# record mpls ipv6-fields labels 3
RP/0/RSP0/CPU0:router(config-fmm)# exporter exp1
RP/0/RSP0/CPU0:router(config-fmm)# cache entries 10000
RP/0/RSP0/CPU0:router(config-fmm)# cache permanent
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# sampler-map FSM
RP/0/RSP0/CPU0:router(config-sm)# random 1 out-of 65535
RP/0/RSP0/CPU0:router(config-sm)# exit
RP/0/RSP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv6-fmm sampler FSM ingress
MPLS Flow Monitor with IPv4 and IPv6 Support: Examples
This configuration collects MPLS traffic, but no payload information is collected.
RP/0/RSP0/CPU0:router(config)# flow monitor-map MPLS-fmm
RP/0/RSP0/CPU0:router(config-fmm)# record mpls labels 3
RP/0/RSP0/CPU0:router(config-fmm)# cache permanent
RP/0/RSP0/CPU0:router(config)# exit
RP/0/RSP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)# flow mpls monitor MPLS-fmm sampler fsm ingress
This configuration collects MPLS traffic with IPv4 payloads. It also collects MPLS traffic without IPv4
payloads, but it populates the IPv4 fields with zeros (0).
RP/0/RSP0/CPU0:router(config)# flow monitor-map MPLS-IPv4-fmm
RP/0/RSP0/CPU0:router(config-fmm)# record mpls IPv4-fields labels 3
RP/0/RSP0/CPU0:router(config-fmm)# cache permanent
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv4-fmm sampler fsm ingress
This configuration collects MPLS traffic with IPv6 payloads. It also collects MPLS traffic without IPv6
payloads, but it populates the IPv6 fields with zeros (0).
RP/0/RSP0/CPU0:router(config)# flow monitor-map MPLS-IPv6-fmm
RP/0/RSP0/CPU0:router(config-fmm)# record mpls IPv6-fields labels 3
RP/0/RSP0/CPU0:router(config-fmm)# cache permanent
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv6-fmm sampler fsm ingress
This configuration collects MPLS traffic with both IPv6 and IPv4 fields. It also collects MPLS traffic without
IPv4 or IPv6 payloads, but it populates the IPv6 and IPv4 fields with zeros (0).
RP/0/RSP0/CPU0:router(config)# flow monitor-map MPLS-IPv4-IPv6-fmm
RP/0/RSP0/CPU0:router(config-fmm)# record mpls IPv4-IPv6-fields labels 3
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Destination-based NetFlow Accounting: Example
RP/0/RSP0/CPU0:router(config-fmm)# cache permanent
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# interface gigabitEthernet 0/0/0/0
RP/0/RSP0/CPU0:router(config-if)# flow mpls monitor MPLS-IPv4-IPv6-fmm sampler fsm ingress
Note
Flow records are exported using the Version 9 format.
Destination-based NetFlow Accounting: Example
This example shows how to configure an IPv4 flow record for destination-based NetFlow accounting:
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# flow exporter-map fem
RP/0/RSP0/CPU0:router(config-fem)# source Loopback0
RP/0/RSP0/CPU0:router(config-fem)# destination 80.80.80.5
RP/0/RSP0/CPU0:router(config-fem)# transport udp 1025
RP/0/RSP0/CPU0:router(config-fem)# exit
RP/0/RSP0/CPU0:router(config)# flow monitor-map map1
RP/0/RSP0/CPU0:router(config-fmm)# record ipv4 destination
RP/0/RSP0/CPU0:router(config-fmm)# exporter fem
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RSP0/CPU0:router(config-if)# flow ipv4 monitor map1 ingress
RP/0/RSP0/CPU0:router(config-if)# end
RP/0/RSP0/CPU0:router# show flow monitor-map map1
This example shows how to configure an IPv6 flow record for destination-based NetFlow accounting:
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# flow monitor-map map2
RP/0/RSP0/CPU0:router(config-fmm)# record ipv6 destination
RP/0/RSP0/CPU0:router(config-fmm)# exit
RP/0/RSP0/CPU0:router(config)# interface gigabitEthernet 0/1/0/0
RP/0/RSP0/CPU0:router(config-if)# flow ipv6 monitor map2 ingress
RP/0/RSP0/CPU0:router(config-if)# end
RP/0/RSP0/CPU0:router# show flow monitor-map map2
This example displays the output for the show flow monitor-map command:
RP/0/RSP0/CPU0:router# show flow monitor-map map2
Tue Jan 22 00:15:53.424 PST
Flow Monitor Map : map2
------------------------------------------------Id:
1
RecordMapName:
ipv6-destination
CacheAgingMode:
Normal
CacheMaxEntries:
65535
CacheActiveTout:
1800 seconds
CacheInactiveTout: 15 seconds
CacheUpdateTout:
N/A
Configure BGP to display BGP attributes in netflow record: Example
This example shows how to configure BGP to display BGP attributes in netflow record:
RP/0/RSP0/CPU0:router(config)# interface loopback 1
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Netflow over BVI: Example
RP/0/RSP0/CPU0:router(config-if)# ipv4 address 5.5.5.5 255.255.255.255.
RP/0/RSP0/CPU0:router(config-if)# exit
RP/0/RSP0/CPU0:router(config)# router bgp 200
RP/0/RSP0/CPU0:router(config-bgp)# bgp router-id 5.5.5.5
RP/0/RSP0/CPU0:router(config-bgp)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-af)# exit
RP/0/RSP0/CPU0:router(config-bgp)# address-family vpnv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-af)# exit
RP/0/RSP0/CPU0:router(config-bgp)# neighbor 6.6.6.6
RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 200
RP/0/RSP0/CPU0:router(config-bgp-nbr)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-nbr-af)# route-policy craft in
RP/0/RSP0/CPU0:router(config-bgp-nbr-af)# route-policy craft out
RP/0/RSP0/CPU0:router(config-bgp-nbr)# exit
RP/0/RSP0/CPU0:router(config-bgp-nbr)# address-family vpnv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-nbr-af)# exit
RP/0/RSP0/CPU0:router(config-bgp-nbr)# exit
RP/0/RSP0/CPU0:router(config-bgp)# vrf vrf1
RP/0/RSP0/CPU0:router(config-bgp-vrf)# rd 100:1
RP/0/RSP0/CPU0:router(config-bgp-vrf)# label-allocation-mode per-vrf
RP/0/RSP0/CPU0:router(config-bgp-vrf)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-vrf-af)# redistribute connected
RP/0/RSP0/CPU0:router(config-bgp-vrf-af)# redistribute static
RP/0/RSP0/CPU0:router(config-bgp-vrf)# exit
RP/0/RSP0/CPU0:router(config-bgp-vrf)# neighbor 196.1.1.2
RP/0/RSP0/CPU0:router(config-bgp-vrf-nbr)# remote-as 100
RP/0/RSP0/CPU0:router(config-bgp-vrf-nbr)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-vrf-nbr-af)# route-policy craft in
RP/0/RSP0/CPU0:router(config-bgp-vrf-nbr-af)# route-policy craft out
RP/0/RSP0/CPU0:router(config-bgp-vrf-nbr-af)# exit
RP/0/RSP0/CPU0:router(config-bgp-vrf-nbr)# exit
RP/0/RSP0/CPU0:router(config-bgp-vrf)# exit
RP/0/RSP0/CPU0:router(config-bgp)# exit
RP/0/RSP0/CPU0:router(config)# exit
Limitations
• When the netflow configuration for VPNv4 or VPNv6 is applied in label allocation mode (either per
prefix or per CE) then the IPv4 or IPv6 netflow do not capture the BGP attributes such as BGP nh, BGP
AS numbers and prefix lengths; these attributes values are set to zero.
• Under VPNv4 and VPNv6 label allocation mode per vrf, BGP attributes, source and destination lengths
are captured but AS numbers are not captured.
• Netflow is not supported on BNG subscriber.
Note
• To enter label mode per VRF, you must type the label-allocation-mode per-vrf command.
• To enter label mode per CE, you must type the label-allocation-mode per-ce command.
• To enter label mode per prefix, you must type the label-allocation-mode per-prefix command.
Netflow over BVI: Example
This example shows how to configure netflow over BVI:
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# l2vpn
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Additional References
RP/0/RSP0/CPU0:router(config-l2vpn)# bridge group bg1
RP/0/RSP0/CPU0:router(config-l2vpn-bg)# bridge-domain bd1
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# interface Bundle-Ether100
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd-ac)# exit
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# interface TenGigE0/0/0/0
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd-ac)# exit
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# routed interface BVI 1
RP/0/RSP0/CPU0:router(config-l2vpn-bg-bd)# interface BVI 1
RP/0/RSP0/CPU0:router(config-if)# ipv4 address 11.11.11.11 255.255.255.0
RP/0/RSP0/CPU0:router(config-if)# flow ipv4 monitor FMM sampler SAMP ingress
RP/0/RSP0/CPU0:router(config-if)# flow ipv4 monitor FMM sampler SAMP egress
RP/0/RSP0/CPU0:router(config-if)# flow ipv6 monitor FMM-v6 sampler SAMP ingress
RP/0/RSP0/CPU0:router(config-if)# flow ipv6 monitor FMM-v6 sampler SAMP egress
RP/0/RSP0/CPU0:router(config-if)# interface TenGigE0/0/0/0
RP/0/RSP0/CPU0:router(config-if)# l2transport
RP/0/RSP0/CPU0:router(config-if)# interface Bundle-Ether100
RP/0/RSP0/CPU0:router(config-if)# l2transport
RP/0/RSP0/CPU0:router(config-if)# end
Additional References
These sections provide references related to interface configuration.
Related Documents
Related Topic
Document Title
Cisco IOS XR master command reference
Cisco IOS XR Master Commands List
Cisco IOS XR interface configuration commands
Cisco ASR 9000 Series Aggregation Services Router
Interface and Hardware Component Command
Reference
Initial system bootup and configuration information Cisco ASR 9000 Series Aggregation Services Router
for a router using the Cisco IOS XR software.
Getting Started Guide
Information about user groups and task IDs
Cisco ASR 9000 Series Aggregation Services Router
Interface and Hardware Component Command
Reference
Information about configuring interfaces and other
components from a remote Craft Works Interface
(CWI) client management application.
Cisco Craft Works Interface User Guide
Standards
Standards
Title
No new or modified standards are supported by this —
feature, and support for existing standards has not
been modified by this feature.
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
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Configuring NetFlow
Additional References
MIBs
MIBs
MIBs Link
—
To locate and download MIBs using Cisco IOS XR
software, use the Cisco MIB Locator found at the
following URL and choose a platform under the Cisco
Access Products menu: http://cisco.com/public/
sw-center/netmgmt/cmtk/mibs.shtml
RFCs
RFCs
Title
3954
NetFlow services export protocol Version 9.
Technical Assistance
Cisco ASR 9000 Series Aggregation Services Router Netflow Configuration Guide, Release 4.3.x
36
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