Configuring IPv6 First Hop Security

Configuring IPv6 First Hop Security

•

Finding Feature Information, page 1

•

Prerequisites for First Hop Security in IPv6, page 1

•

Restrictions for First Hop Security in IPv6, page 2

•

Information about First Hop Security in IPv6, page 2

•

How to Configure an IPv6 Snooping Policy, page 4

•

How to Configure the IPv6 Binding Table Content , page 10

•

How to Configure an IPv6 Neighbor Discovery Inspection Policy, page 11

•

How to Configure an IPv6 Router Advertisement Guard Policy, page 17

•

How to Configure an IPv6 DHCP Guard Policy , page 23

•

How to Configure IPv6 Source Guard, page 28

•

How to Configure IPv6 Prefix Guard, page 32

•

Configuration Examples for IPv6 First Hop Security, page 35

•

Additional References, page 36

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support.

To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn . An account on Cisco.com is not required.

Prerequisites for First Hop Security in IPv6

• You have configured the necessary IPv6 enabled SDM template.

Consolidated Platform Configuration Guide, Cisco IOS XE 3.7E and Later (Catalyst 3850 Switches)

1


Restrictions for First Hop Security in IPv6

• You should be familiar with the IPv6 neighbor discovery feature.

Restrictions for First Hop Security in IPv6

• The following restrictions apply when applying FHS policies to EtherChannel interfaces (Port Channels):

◦A physical port with an FHS policy attached cannot join an EtherChannel group.

◦An FHS policy cannot be attached to an physical port when it is a member of an EtherChannel group.

Information about First Hop Security in IPv6

First Hop Security in IPv6 (FHS IPv6) is a set of IPv6 security features, the policies of which can be attached to a physical interface, an EtherChannel interface, or a VLAN. An IPv6 software policy database service stores and accesses these policies. When a policy is configured or modified, the attributes of the policy are stored or updated in the software policy database, then applied as was specified. The following IPv6 policies are currently supported:

• IPv6 Snooping Policy—IPv6 Snooping Policy acts as a container policy that enables most of the features available with FHS in IPv6.

• IPv6 FHS Binding Table Content—A database table of IPv6 neighbors connected to the switch is created from information sources such as Neighbor Discovery (ND) protocol snooping. This database, or binding, table is used by various IPv6 guard features (such as IPv6 ND Inspection) to validate the link-layer address (LLA), the IPv4 or IPv6 address, and prefix binding of the neighbors to prevent spoofing and redirect attacks.

• IPv6 Neighbor Discovery Inspection—IPv6 ND inspection learns and secures bindings for stateless autoconfiguration addresses in Layer 2 neighbor tables. IPv6 ND inspection analyzes neighbor discovery messages in order to build a trusted binding table database and IPv6 neighbor discovery messages that do not conform are dropped. An ND message is considered trustworthy if its IPv6-to-Media Access

Control (MAC) mapping is verifiable.

This feature mitigates some of the inherent vulnerabilities of the ND mechanism, such as attacks on

DAD, address resolution, router discovery, and the neighbor cache.

• IPv6 Router Advertisement Guard—The IPv6 Router Advertisement (RA) guard feature enables the network administrator to block or reject unwanted or rogue RA guard messages that arrive at the network switch platform. RAs are used by routers to announce themselves on the link. The RA Guard feature analyzes the RAs and filters out bogus RAs sent by unauthorized routers. In host mode, all router advertisement and router redirect messages are disallowed on the port. The RA guard feature compares configuration information on the Layer 2 device with the information found in the received RA frame.

Once the Layer 2 device has validated the content of the RA frame and router redirect frame against the configuration, it forwards the RA to its unicast or multicast destination. If the RA frame content is not validated, the RA is dropped.

• IPv6 DHCP Guard—The IPv6 DHCP Guard feature blocks reply and advertisement messages that come from unauthorized DHCPv6 servers and relay agents. IPv6 DHCP guard can prevent forged messages from being entered in the binding table and block DHCPv6 server messages when they are received on ports that are not explicitly configured as facing a DHCPv6 server or DHCP relay. To use this feature,

2



Information about First Hop Security in IPv6

configure a policy and attach it to an interface or a VLAN. To debug DHCP guard packets, use the

debug ipv6 snooping dhcp-guard privileged EXEC command.

• IPv6 Source Guard—Like IPv4 Source Guard, IPv6 Source Guard validates the source address or prefix to prevent source address spoofing.

A source guard programs the hardware to allow or deny traffic based on source or destination addresses.

It deals exclusively with data packet traffic.

The IPv6 source guard feature provides the ability to store entries in the hardware TCAM table to prevent a host from sending packets with an invalid IPv6 source address.

To debug source-guard packets, use the debug ipv6 snooping source-guard privileged EXEC command.

Note

The IPv6 source guard and prefix guard features are supported only in the ingress direction; it is not supported in the egress direction.

The following restrictions apply:

◦An FHS policy cannot be attached to an physical port when it is a member of an EtherChannel group.

◦When IPv6 source guard is enabled on a switch port, NDP or DHCP snooping must be enabled on the interface to which the switch port belongs. Otherwise, all data traffic from this port will be blocked.

◦An IPv6 source guard policy cannot be attached to a VLAN. It is supported only at the interface level.

◦You cannot use IPv6 Source Guard and Prefix Guard together. When you attach the policy to an interface, it should be "validate address" or "validate prefix" but not both.

◦PVLAN and Source/Prefix Guard cannot be applied together.

◦IPv6 Source Guard and Prefix Guard is supported on EtherChannels

For more information on IPv6 Source Guard, see the IPv6 Source Guard chapter of the Cisco IOS IPv6

Configuration Guide Library on Cisco.com.

• IPv6 Prefix Guard—The IPv6 prefix guard feature works within the IPv6 source guard feature, to enable the device to deny traffic originated from non-topologically correct addresses. IPv6 prefix guard is often used when IPv6 prefixes are delegated to devices (for example, home gateways) using DHCP prefix delegation. The feature discovers ranges of addresses assigned to the link and blocks any traffic sourced with an address outside this range.

For more information on IPv6 Prefix Guard, see the IPv6 Prefix Guard chapter of the Cisco IOS IPv6

Configuration Guide Library on Cisco.com.

• IPv6 Destination Guard—The IPv6 destination guard feature works with IPv6 neighbor discovery to ensure that the device performs address resolution only for those addresses that are known to be active on the link. It relies on the address glean functionality to populate all destinations active on the link into the binding table and then blocks resolutions before they happen when the destination is not found in the binding table.


3


How to Configure an IPv6 Snooping Policy

Note

IPv6 Destination Guard is recommended to apply on Layer 2 VLAN with an SVI configured

For more information about IPv6 Destination Guard, see the IPv6 Destination Guard chapter of the

Cisco IOS IPv6 Configuration Guide Library on Cisco.com.

Related Topics

How to Configure an IPv6 Snooping Policy, on page 4

How to Attach an IPv6 Snooping Policy to an Interface, on page 6

How to Attach an IPv6 Snooping Policy to a Layer 2 EtherChannel Interface, on page 8

How to Attach an IPv6 Snooping Policy to VLANs Globally , on page 9

How to Configure the IPv6 Binding Table Content , on page 10

How to Configure an IPv6 Neighbor Discovery Inspection Policy, on page 11

How to Attach an IPv6 Neighbor Discovery Inspection Policy to an Interface , on page 14

How to Attach an IPv6 Snooping Policy to a Layer 2 EtherChannel Interface, on page 8

How to Attach an IPv6 Neighbor Discovery Inspection Policy to VLANs Globally , on page 16

How to Configure an IPv6 Router Advertisement Guard Policy, on page 17

How to Attach an IPv6 Router Advertisement Guard Policy to an Interface, on page 19

How to Attach an IPv6 Router Advertisement Guard Policy to a Layer 2 EtherChannel Interface , on

page 20

How to Attach an IPv6 Router Advertisement Guard Policy to VLANs Globally, on page 22

How to Configure an IPv6 DHCP Guard Policy , on page 23

How to Attach an IPv6 DHCP Guard Policy to an Interface or a VLAN on an Interface, on page 25

How to Attach an IPv6 DHCP Guard Policy to a Layer 2 EtherChannel Interface, on page 26

How to Attach an IPv6 DHCP Guard Policy to VLANs Globally , on page 27

How to Configure IPv6 Source Guard, on page 28

How to Attach an IPv6 Source Guard Policy to an Interface, on page 30

How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface, on page 31

How to Configure IPv6 Prefix Guard, on page 32

How to Attach an IPv6 Prefix Guard Policy to an Interface, on page 33

How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface, on page 34


Beginning in privileged EXEC mode, follow these steps to configure IPv6 Snooping Policy :

4




SUMMARY STEPS

1. configure terminal

2. ipv6 snooping policy policy-name

3. {[default ] | [device-role {node | switch}] | [limit address-count value] | [no] | [protocol {dhcp | ndp}

] | [security-level {glean | guard | inspect} ] | [tracking {disable [stale-lifetime [seconds | infinite] |

enable [reachable-lifetime [seconds | infinite] } ] | [trusted-port ] }

4. end

5. show ipv6 snooping policy policy-name

DETAILED STEPS

Step 1

Command or Action configure terminal

Purpose

Enters the global configuration mode.

Step 2

Step 3

Example:

Switch#

configure terminal

ipv6 snooping policy policy-name

Creates a snooping policy and enters IPv6 Snooping Policy Configuration mode.

Example:

Switch(config)#

ipv6 snooping policy example_policy

{[default ] | [device-role {node | switch}] |

[limit address-count value] | [no] | [protocol

{dhcp | ndp} ] | [security-level {glean | guard

| inspect} ] | [tracking {disable [stale-lifetime

[seconds | infinite] | enable

[reachable-lifetime [seconds | infinite] } ] |

[trusted-port ] }

Enables data address gleaning, validates messages against various criteria, specifies the security level for messages.

• (Optional) default—Sets all to default options.

• (Optional) device-role{node] | switch}—Specifies the role of the device attached to the port. Default is node.

• (Optional) limit address-count value—Limits the number of addresses allowed per target.

Example:

Switch(config-ipv6-snooping)# security-level inspect

• (Optional) no—Negates a command or sets it to defaults.

Example:

Switch(config-ipv6-snooping)# trusted-port

• (Optional) protocol{dhcp | ndp}—Specifies which protocol should be redirected to the snooping feature for analysis. The default, is dhcp and ndp. To change the default, use the no protocol command.

• (Optional) security-level{glean|guard|inspect}—Specifies the level of security enforced by the feature. Default is guard.

glean—Gleans addresses from messages and populates the binding table without any verification.

guard—Gleans addresses and inspects messages. In addition, it rejects RA and DHCP server messages. This is the default option.

inspect—Gleans addresses, validates messages for consistency and conformance, and enforces address ownership.


5


How to Attach an IPv6 Snooping Policy to an Interface

Command or Action

Step 4 end

Step 5

Example:

Switch(config-ipv6-snooping)#

exit

show ipv6 snooping policy policy-name

Example:

Switch#

show ipv6 snooping policy example_policy

Purpose

• (Optional) tracking {disable | enable}—Overrides the default tracking behavior and specifies a tracking option.

• (Optional) trusted-port—Sets up a trusted port. It disables the guard on applicable targets. Bindings learned through a trusted port have preference over bindings learned through any other port. A trusted port is given preference in case of a collision while making an entry in the table.

Exits configuration modes to Privileged EXEC mode.

Displays the snooping policy configuration.

What to Do Next

Attach an IPv6 Snooping policy to interfaces or VLANs.

Related Topics

Information about First Hop Security in IPv6, on page 2


Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Snooping policy on an interface or

VLAN:

SUMMARY STEPS


2. interface Interface_type stack/module/port

3. switchport

4. ipv6 snooping [attach-policy policy_name [ vlan {vlan_id | add vlan_ids | exceptvlan_ids | none |

remove vlan_ids}] | vlan {vlan_id | add vlan_ids | exceptvlan_ids | none | remove vlan_ids | all} ]

5. do show running-config

6




DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Step 5


Purpose


Example:

Switch#


interface Interface_type stack/module/port

Specifies an interface type and identifier; enters the interface configuration mode.

Example:

Switch(config)#

interface gigabitethernet

1/1/4 switchport

Example:

Switch(config-if)#

switchport

Enters the Switchport mode.

Note

To configure Layer 2 parameters, if the interface is in Layer

3 mode, you must enter the switchport interface configuration command without any parameters to put the interface into

Layer 2 mode. This shuts down the interface and then re-enables it, which might generate messages on the device to which the interface is connected. When you put an interface that is in Layer 3 mode into Layer 2 mode, the previous configuration information related to the affected interface might be lost, and the interface is returned to its default configuration. The command prompt displays as (config-if)# in Switchport configuration mode.

ipv6 snooping [attach-policy policy_name [ vlan

{vlan_id | add vlan_ids | exceptvlan_ids | none |

Attaches a custom ipv6 snooping policy to the interface or the specified

VLANs on the interface. To attach the default policy to the interface, use the ipv6 snooping command without the attach-policy keyword.

remove vlan_ids}] | vlan {vlan_id | add vlan_ids

| exceptvlan_ids | none | remove vlan_ids | all} ] To attach the default policy to VLANs on the interface, use the ipv6

snooping vlan command. The default policy is, security-level guard,

Example:

Switch(config-if)#

ipv6 snooping

device-role node, protocol ndp and dhcp. or

Switch(config-if)#

ipv6 snooping attach-policy example_policy

or

Switch(config-if)#

ipv6 snooping vlan

111,112

or

Switch(config-if)#

ipv6 snooping attach-policy example_policy vlan 111,112 do show running-config

Example:

Switch#(config-if)#

do show running-config

Verifies that the policy is attached to the specified interface without exiting the interface configuration mode.


7


How to Attach an IPv6 Snooping Policy to a Layer 2 EtherChannel Interface

Related Topics


How to Attach an IPv6 Snooping Policy to a Layer 2 EtherChannel Interface

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Snooping policy on an EtherChannel interface or VLAN:

SUMMARY STEPS


2. interface range Interface_name

3. ipv6 snooping [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none |

remove vlan_ids | all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none | remove vlan_ids |

all} ]

4. do show running-config interfaceportchannel_interface_name

DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#


interface range Interface_name

Example:

Switch(config)#

interface Po11

Specify the port-channel interface name assigned when the EtherChannel was created. Enters the interface range configuration mode.

Tip

Enter the do show interfaces summary command for quick reference to interface names and types.

ipv6 snooping [attach-policy policy_name [ vlan {vlan_ids |

add vlan_ids | except vlan_ids | none | remove vlan_ids | all}

] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none |

remove vlan_ids | all} ]

Attaches the IPv6 Snooping policy to the interface or the specified VLANs on that interface. The default policy is attached if the attach-policy option is not used.

Example:

Switch(config-if-range)#


or


ipv6 snooping attach-policy example_policy vlan 222,223,224 or

8



How to Attach an IPv6 Snooping Policy to VLANs Globally



ipv6 snooping vlan 222,

223,224

Purpose

Step 4

do show running-config interfaceportchannel_interface_name Confirms that the policy is attached to the specified interface without exiting the configuration mode.

Example:

Switch#(config-if-range)#

do show running-config int po11

Related Topics



How to Attach an IPv6 Snooping Policy to VLANs Globally

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Snooping Policy to VLANs across multiple interfaces:

SUMMARY STEPS


2. vlan configuration vlan_list

3. ipv6 snooping [attach-policy policy_name]


DETAILED STEPS

Step 1

Step 2


Example:

Switch#


vlan configuration vlan_list

Example:

Switch(config)#

vlan configuration 333

Purpose


Specifies the VLANs to which the IPv6 Snooping policy will be attached ; enters the VLAN interface configuration mode.


9


How to Configure the IPv6 Binding Table Content

Step 3

Step 4


ipv6 snooping [attach-policy policy_name]

Example:

Switch(config-vlan-config)#


Purpose

Attaches the IPv6 Snooping policy to the specified VLANs across all switch and stack interfaces. The default policy is attached if the attach-policy option is not used. The default policy is, security-level guard, device-role node, protocol ndp and dhcp.


Example:

Switch#(config-if)#


Verifies that the policy is attached to the specified VLANs without exiting the interface configuration mode.

Related Topics


How to Configure the IPv6 Binding Table Content

Beginning in privileged EXEC mode, follow these steps to configure IPv6 Binding Table Content :

SUMMARY STEPS


2. [no] ipv6 neighbor binding [vlan vlan-id {ipv6-address interface interface_type stack/module/port

hw_address [reachable-lifetimevalue [seconds | default | infinite] | [tracking{ [default | disable] [

reachable-lifetimevalue [seconds | default | infinite] | [enable [reachable-lifetimevalue [seconds |

default | infinite] | [retry-interval {seconds| default [reachable-lifetimevalue [seconds | default | infinite]

} ]

3. [no] ipv6 neighbor binding max-entries number [mac-limit number | port-limit number [mac-limit

number] | vlan-limit number [ [mac-limit number] | [port-limit number [mac-limitnumber] ] ] ]

4. ipv6 neighbor binding logging

5. exit

6. show ipv6 neighbor binding

DETAILED STEPS

Step 1


Example:

Switch#


Purpose


10



How to Configure an IPv6 Neighbor Discovery Inspection Policy

Step 2

Step 3

Step 4

Step 5

Step 6

Command or Action Purpose

[no] ipv6 neighbor binding [vlan vlan-id {ipv6-address interface interface_type stack/module/port hw_address [reachable-lifetimevalue

[seconds | default | infinite] | [tracking{ [default | disable] [

reachable-lifetimevalue [seconds | default | infinite] | [enable

[reachable-lifetimevalue [seconds | default | infinite] | [retry-interval

{seconds| default [reachable-lifetimevalue [seconds | default | infinite]

} ]

Adds a static entry to the binding table database.

Example:

Switch(config)#

ipv6 neighbor binding

[no] ipv6 neighbor binding max-entries number [mac-limit number |

port-limit number [mac-limit number] | vlan-limit number [ [mac-limit

number] | [port-limit number [mac-limitnumber] ] ] ]

Specifies the maximum number of entries that are allowed to be inserted in the binding table cache.

Example:

Switch(config)#

ipv6 neighbor binding max-entries 30000 ipv6 neighbor binding logging

Enables the logging of binding table main events.

Example:

Switch(config)#

ipv6 neighbor binding logging exit

Exits global configuration mode, and places the router in privileged EXEC mode.

Example:

Switch(config)#

exit show ipv6 neighbor binding

Displays contents of a binding table.

Example:

Switch#

show ipv6 neighbor binding

Related Topics



Beginning in privileged EXEC mode, follow these steps to configure an IPv6 ND Inspection Policy:


11



SUMMARY STEPS


2. [no]ipv6 nd inspection policy policy-name

3. device-role {host | monitor | router | switch}

4. drop-unsecure

5. limit address-count value

6. sec-level minimum value

7. tracking {enable [reachable-lifetime {value | infinite}] | disable [stale-lifetime {value | infinite}]}

8. trusted-port

9. validate source-mac

10. no {device-role | drop-unsecure | limit address-count | sec-level minimum | tracking | trusted-port |

validate source-mac}

11. default {device-role | drop-unsecure | limit address-count | sec-level minimum | tracking | trusted-port

| validate source-mac}

12. do show ipv6 nd inspection policy policy_name

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Step 5


Purpose


Example:

Switch#


[no]ipv6 nd inspection policy policy-name

Example:

Switch(config)#

ipv6 nd inspection policy example_policy

device-role {host | monitor | router | switch}

Specifies the ND inspection policy name and enters

ND Inspection Policy configuration mode.

Specifies the role of the device attached to the port.

The default is host.

Example:

Switch(config-nd-inspection)#

device-role switch drop-unsecure

Example:


drop-unsecure

limit address-count value

Example:


limit address-count 1000

Drops messages with no or invalid options or an invalid signature.

Enter 1–10,000.

12




Step 6

Step 7

Step 8

Step 9

Step 10

Step 11

Step 12


sec-level minimum value

Example:


limit address-count 1000

Specifies the minimum security level parameter value when Cryptographically Generated Address

(CGA) options are used.

tracking {enable [reachable-lifetime {value | infinite}] |

disable [stale-lifetime {value | infinite}]}

Overrides the default tracking policy on a port.

Example:


tracking disable stale-lifetime infinite trusted-port

Example:


trusted-port validate source-mac

Configures a port to become a trusted port.

Checks the source media access control (MAC) address against the link-layer address.

Example:


validate source-mac

no {device-role | drop-unsecure | limit address-count |

sec-level minimum | tracking | trusted-port | validate

source-mac}

Remove the current configuration of a parameter with the no form of the command.

Example:


no validate source-mac

default {device-role | drop-unsecure | limit address-count |

sec-level minimum | tracking | trusted-port | validate

source-mac}

Restores configuration to the default values.

Example:


default limit address-count

do show ipv6 nd inspection policy policy_name

Example:


do show ipv6 nd inspection policy example_policy

Verifies the ND Inspection Configuration without exiting ND inspection configuration mode.

Related Topics



13


How to Attach an IPv6 Neighbor Discovery Inspection Policy to an Interface

How to Attach an IPv6 Neighbor Discovery Inspection Policy to an Interface

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 ND Inspection policy to an interface or VLANs on an interface :

SUMMARY STEPS



3. ipv6 nd inspection [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none

| remove vlan_ids | all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none | remove vlan_ids |

all} ]


DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#




Example:

Switch(config)#

interface gigabitethernet 1/1/4

ipv6 nd inspection [attach-policy policy_name [ vlan {vlan_ids

| add vlan_ids | except vlan_ids | none | remove vlan_ids | all}

] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none |

remove vlan_ids | all} ]

Attaches the Neighbor Discovery Inspection policy to the interface or the specified VLANs on that interface. The default policy is attached if the

attach-policy option is not used.

Example:

Switch(config-if)#

ipv6 nd inspection attach-policy example_policy

or

Switch(config-if)#

ipv6 nd inspection attach-policy example_policy vlan 222,223,224 or

Switch(config-if)#

ipv6 nd inspection vlan 222, 223,224

Step 4 do show running-config

Example:

Switch#(config-if)#


Verifies that the policy is attached to the specified interface without exiting the interface configuration mode.

14



How to Attach an IPv6 Neighbor Discovery Inspection Policy to a Layer 2 EtherChannel Interface

Related Topics


How to Attach an IPv6 Neighbor Discovery Inspection Policy to a Layer 2

EtherChannel Interface

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Neighbor Discovery Inspection policy on an EtherChannel interface or VLAN:

SUMMARY STEPS



3. ipv6 nd inspection [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none

| remove vlan_ids | all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none | remove vlan_ids |

all} ]


DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#



Example:

Switch(config)#

interface Po11

ipv6 nd inspection [attach-policy policy_name [ vlan

{vlan_ids | add vlan_ids | except vlan_ids | none | remove

vlan_ids | all} ] | vlan [ {vlan_ids | add vlan_ids |

exceptvlan_ids | none | remove vlan_ids | all} ]


Tip


Attaches the ND Inspection policy to the interface or the specified VLANs on that interface. The default policy is attached if the attach-policy option is not used.

Example:



or


ipv6 nd inspection


15


How to Attach an IPv6 Neighbor Discovery Inspection Policy to VLANs Globally

Command or Action attach-policy example_policy vlan 222,223,224 or


ipv6 nd inspection vlan 222,

223,224

Purpose

Step 4

do show running-config interfaceportchannel_interface_name

Confirms that the policy is attached to the specified interface without exiting the configuration mode.

Example:



How to Attach an IPv6 Neighbor Discovery Inspection Policy to VLANs Globally

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 ND Inspection policy to VLANs across multiple interfaces:

SUMMARY STEPS



3. ipv6 nd inspection [attach-policy policy_name]


DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#


vlan configuration vlan_list Specifies the VLANs to which the IPv6 Snooping policy will be attached ; enters the VLAN interface configuration mode.

Example:

Switch(config)#


ipv6 nd inspection [attach-policy policy_name] Attaches the IPv6 Neighbor Discovery policy to the specified

VLANs across all switch and stack interfaces. The default policy is attached if the attach-policy option is not used.

Example:



The default policy is, device-role host, no drop-unsecure, limit address-count disabled, sec-level minimum is disabled, tracking is disabled, no trusted-port, no validate source-mac.

16



How to Configure an IPv6 Router Advertisement Guard Policy

Step 4

Command or Action do show running-config

Example:

Switch#(config-if)#


Purpose

Confirms that the policy is attached to the specified VLANs without exiting the configuration mode.

Related Topics



Beginning in privileged EXEC mode, follow these steps to configure an IPv6 Router Advertisement policy :

SUMMARY STEPS


2. [no]ipv6 nd raguard policy policy-name

3. [no]device-role {host | monitor | router | switch}

4. [no]hop-limit {maximum | minimum} value

5. [no]managed-config-flag {off | on}

6. [no]match {ipv6 access-list list | ra prefix-list list}

7. [no]other-config-flag {on | off}

8. [no]router-preference maximum {high | medium | low}

9. [no]trusted-port

10. default {device-role | hop-limit {maximum | minimum} | managed-config-flag | match {ipv6 access-list

| ra prefix-list } | other-config-flag | router-preference maximum| trusted-port}

11. do show ipv6 nd raguard policy policy_name

DETAILED STEPS

Step 1

Step 2


Purpose


Example:

Switch#


[no]ipv6 nd raguard policy policy-name

Example:

Switch(config)#

ipv6 nd raguard policy example_policy

Specifies the RA Guard policy name and enters RA Guard Policy configuration mode.


17



Step 3

Step 4

Step 5

Step 6

Step 7

Step 8


[no]device-role {host | monitor | router |

switch}

Purpose

Specifies the role of the device attached to the port. The default is

host.

Example:

Switch(config-nd-raguard)#

device-role switch

[no]hop-limit {maximum | minimum} value

Example:


hop-limit maximum 33

[no]managed-config-flag {off | on}

Example:


managed-config-flag on

(1–255) Range for Maximum and Minimum Hop Limit values.

Enables filtering of Router Advertisement messages by the Hop Limit value. A rogue RA message may have a low Hop Limit value

(equivalent to the IPv4 Time to Live) that when accepted by the host, prevents the host from generating traffic to destinations beyond the rogue RA message generator. An RA message with an unspecified

Hop Limit value is blocked.

If not configured, this filter is disabled. Configure minimum to block

RA messages with Hop Limit values lower than the value you specify.

Configure maximumto block RA messages with Hop Limit values greater than the value you specify.

Enables filtering of Router Advertisement messages by the Managed

Address Configuration, or "M" flag field. A rouge RA message with an M field of 1 can cause a host to use a rogue DHCPv6 server. If not configured, this filter is disabled.

On—Accepts and forwards RA messages with an M value of 1, blocks those with 0.

Off—Accepts and forwards RA messages with an M value of 0, blocks those with 1.

[no]match {ipv6 access-list list | ra prefix-list

list}

Matches a specified prefix list or access list.

Example:


match ipv6 access-list example_list

[no]other-config-flag {on | off}

Example:


other-config-flag on

[no]router-preference maximum {high |

medium | low}

Enables filtering of Router Advertisement messages by the Other

Configuration, or "O" flag field. A rouge RA message with an O field of 1 can cause a host to use a rogue DHCPv6 server. If not configured, this filter is disabled.

On—Accepts and forwards RA messages with an O value of 1, blocks those with 0.

Off—Accepts and forwards RA messages with an O value of 0, blocks those with 1.

Enables filtering of Router Advertisement messages by the Router

Preference flag. If not configured, this filter is disabled.

18



How to Attach an IPv6 Router Advertisement Guard Policy to an Interface

Step 9

Step 10

Step 11


Example:


router-preference maximum high

Purpose

• high—Accepts RA messages with the Router Preference set to high, medium, or low.

• medium—Blocks RA messages with the Router Preference set to high.

• low—Blocks RA messages with the Router Preference set to medium and high.

[no]trusted-port When configured as a trusted port, all attached devices are trusted, and no further message verification is performed.

Example:


trusted-port

default {device-role | hop-limit {maximum |

minimum} | managed-config-flag | match {ipv6

access-list | ra prefix-list } | other-config-flag |

router-preference maximum| trusted-port}

Restores a command to its default value.

Example:


default hop-limit

do show ipv6 nd raguard policy policy_name (Optional)—Displays the ND Guard Policy configuration without exiting the RA Guard policy configuration mode.

Example:


do show ipv6 nd raguard policy example_policy

Related Topics


How to Attach an IPv6 Router Advertisement Guard Policy to an Interface

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Router Advertisement policy to an interface or to VLANs on the interface :

SUMMARY STEPS



3. ipv6 nd raguard [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none |


all} ]



19


How to Attach an IPv6 Router Advertisement Guard Policy to a Layer 2 EtherChannel Interface

DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#




Example:

Switch(config)#


ipv6 nd raguard [attach-policy policy_name [ vlan {vlan_ids |

add vlan_ids | except vlan_ids | none | remove vlan_ids | all} ]

| vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none | remove

vlan_ids | all} ]

Attaches the Neighbor Discovery Inspection policy to the interface or the specified VLANs on that interface. The default policy is attached if the

attach-policy option is not used.

Example:

Switch(config-if)#

ipv6 nd raguard attach-policy example_policy

or

Switch(config-if)#

ipv6 nd raguard attach-policy example_policy vlan 222,223,224 or

Switch(config-if)#

ipv6 nd raguard vlan 222, 223,224

Step 4 do show running-config

Example:

Switch#(config-if)#


Confirms that the policy is attached to the specified interface without exiting the configuration mode.

Related Topics


How to Attach an IPv6 Router Advertisement Guard Policy to a Layer 2

EtherChannel Interface

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Router Advertisement Guard Policy on an EtherChannel interface or VLAN:

20



How to Attach an IPv6 Router Advertisement Guard Policy to a Layer 2 EtherChannel Interface

SUMMARY STEPS



3. ipv6 nd raguard [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none |


all} ]


DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#



Example:

Switch(config)#

interface Po11


Tip


ipv6 nd raguard [attach-policy policy_name [ vlan {vlan_ids

| add vlan_ids | except vlan_ids | none | remove vlan_ids |

all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none

| remove vlan_ids | all} ]

Attaches the RA Guard policy to the interface or the specified VLANs on that interface. The default policy is attached if the attach-policy option is not used.

Example:


ipv6 nd raguard attach-policy example_policy

or


ipv6 nd raguard attach-policy example_policy vlan 222,223,224 or


ipv6 nd raguard vlan 222,

223,224

Step 4


Example:




21


How to Attach an IPv6 Router Advertisement Guard Policy to VLANs Globally

Related Topics


How to Attach an IPv6 Router Advertisement Guard Policy to VLANs Globally

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 Router Advertisement policy to

VLANs regardless of interface:

SUMMARY STEPS



3. ipv6 dhcp guard [attach-policy policy_name]


DETAILED STEPS

Step 1

Step 2

Step 3

Step 4


Purpose

Enters global configuration mode.

Example:

Switch#



Example:

Switch(config)#


ipv6 dhcp guard [attach-policy policy_name]

Specifies the VLANs to which the IPv6 RA Guard policy will be attached ; enters the VLAN interface configuration mode.

Example:


ipv6 nd raguard attach-policy example_policy do show running-config

Example:

Switch#(config-if)#


Attaches the IPv6 RA Guard policy to the specified VLANs across all switch and stack interfaces. The default policy is attached if the attach-policy option is not used.


Related Topics


22



How to Configure an IPv6 DHCP Guard Policy


Beginning in privileged EXEC mode, follow these steps to configure an IPv6 DHCP (DHCPv6) Guard policy:

SUMMARY STEPS


2. [no]ipv6 dhcp guard policy policy-name

3. [no]device-role {client | server}

4. [no] match server access-list ipv6-access-list-name

5. [no] match reply prefix-list ipv6-prefix-list-name

6. [no]preference{ max limit | min limit }

7. [no] trusted-port

8. default {device-role | trusted-port}

9. do show ipv6 dhcp guard policy policy_name

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4


Purpose


Example:

Switch#


[no]ipv6 dhcp guard policy policy-name Specifies the DHCPv6 Guard policy name and enters DHCPv6

Guard Policy configuration mode.

Example:

Switch(config)#

ipv6 dhcp guard policy example_policy

[no]device-role {client | server}

Example:

Switch(config-dhcp-guard)#

device-role server

(Optional) Filters out DHCPv6 replies and DHCPv6 advertisements on the port that are not from a device of the specified role. Default is client.

• client—Default value, specifies that the attached device is a client. Server messages are dropped on this port.

• server—Specifies that the attached device is a DHCPv6 server.

Server messages are allowed on this port.

[no] match server access-list ipv6-access-list-name

Example:

(Optional). Enables verification that the advertised DHCPv6 server or relay address is from an authorized server access list (The destination address in the access list is 'any'). If not configured, this check will be bypassed. An empty access list is treated as a permit all.

;;Assume a preconfigured IPv6 Access List as follows:

Switch(config)#

ipv6 access-list my_acls

Switch(config-ipv6-acl)#

permit host

FE80::A8BB:CCFF:FE01:F700 any


23



Step 5

Step 6

Step 7

Step 8

Step 9


;;configure DCHPv6 Guard to match approved access list.


match server access-list my_acls

[no] match reply prefix-list ipv6-prefix-list-name

Example:

Purpose

(Optional) Enables verification of the advertised prefixes in DHCPv6 reply messages from the configured authorized prefix list. If not configured, this check will be bypassed. An empty prefix list is treated as a permit.

;;Assume a preconfigured IPv6 prefix list as follows:

Switch(config)#

ipv6 prefix-list my_prefix permit 2001:0DB8::/64 le 128

;; Configure DCHPv6 Guard to match prefix


match reply prefix-list my_prefix

[no]preference{ max limit | min limit }

Example:


preference max

250


preference min 150

Configure max and min when device-role is serverto filter DCHPv6 server advertisements by the server preference value. The defaults permit all advertisements.

max limit—(0 to 255) (Optional) Enables verification that the advertised preference (in preference option) is less than the specified limit. Default is 255. If not specified, this check will be bypassed.

min limit—(0 to 255) (Optional) Enables verification that the advertised preference (in preference option) is greater than the specified limit. Default is 0. If not specified, this check will be bypassed.

[no] trusted-port

Example:


trusted-port

default {device-role | trusted-port}

(Optional) trusted-port—Sets the port to a trusted mode. No further policing takes place on the port.

Note

If you configure a trusted port then the device-role option is not available.

(Optional) default—Sets a command to its defaults.

Example:


default device-role

do show ipv6 dhcp guard policy policy_name

Example:


do show ipv6 dhcp guard policy example_policy

(Optional) Displays the configuration of the IPv6 DHCP guard policy without leaving the configuration submode. Omitting the

policy_name variable displays all DHCPv6 policies.

Example of DHCPv6 Guard Configuration

enable configure terminal ipv6 access-list acl1 permit host FE80::A8BB:CCFF:FE01:F700 any ipv6 prefix-list abc permit 2001:0DB8::/64 le 128

24



How to Attach an IPv6 DHCP Guard Policy to an Interface or a VLAN on an Interface

ipv6 dhcp guard policy pol1 device-role server match server access-list acl1 match reply prefix-list abc preference min 0 preference max 255 trusted-port interface GigabitEthernet 0/2/0 switchport ipv6 dhcp guard attach-policy pol1 vlan add 1 vlan 1 ipv6 dhcp guard attach-policy pol1 show ipv6 dhcp guard policy pol1

Related Topics


How to Attach an IPv6 DHCP Guard Policy to an Interface or a VLAN on an

Interface

Beginning in privileged EXEC mode, follow these steps to configure IPv6 Binding Table Content :

SUMMARY STEPS



3. ipv6 dhcp guard [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none |


all} ]

4. do show running-config interface Interface_type stack/module/port

DETAILED STEPS

Step 1

Step 2

Step 3


Purpose


Example:

Switch#


interface Interface_type stack/module/port Specifies an interface type and identifier; enters the interface configuration mode.

Example:

Switch(config)#


ipv6 dhcp guard [attach-policy policy_name [ vlan {vlan_ids |

add vlan_ids | except vlan_ids | none | remove vlan_ids | all} ] |

vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none | remove

vlan_ids | all} ]

Attaches the DHCP Guard policy to the interface or the specified VLANs on that interface. The default policy is attached if the attach-policy option is not used.

Example:

Switch(config-if)#

ipv6 dhcp guard attach-policy example_policy


25


How to Attach an IPv6 DHCP Guard Policy to a Layer 2 EtherChannel Interface

Step 4


or

Switch(config-if)#

ipv6 dhcp guard attach-policy example_policy vlan 222,223,224 or

Switch(config-if)#

ipv6 dhcp guard vlan 222, 223,224

Purpose

do show running-config interface Interface_type stack/module/port Confirms that the policy is attached to the specified interface without exiting the configuration mode.

Example:

Switch#(config-if)#

do show running-config gig 1/1/4

Related Topics


How to Attach an IPv6 DHCP Guard Policy to a Layer 2 EtherChannel Interface

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 DHCP Guard policy on an

EtherChannel interface or VLAN:

SUMMARY STEPS



3. ipv6 dhcp guard [attach-policy policy_name [ vlan {vlan_ids | add vlan_ids | except vlan_ids | none |


all} ]


DETAILED STEPS

Step 1

Step 2


Example:

Switch#



Example:

Switch(config)#

interface Po11

Purpose



26



How to Attach an IPv6 DHCP Guard Policy to VLANs Globally

Step 3


Tip


ipv6 dhcp guard [attach-policy policy_name [ vlan {vlan_ids

| add vlan_ids | except vlan_ids | none | remove vlan_ids |

all} ] | vlan [ {vlan_ids | add vlan_ids | exceptvlan_ids | none

| remove vlan_ids | all} ]

Attaches the DHCP Guard policy to the interface or the specified VLANs on that interface. The default policy is attached if the attach-policy option is not used.

Example:



or


ipv6 dhcp guard attach-policy example_policy vlan 222,223,224 or


ipv6 dhcp guard vlan 222,

223,224

Step 4


Example:



Related Topics


How to Attach an IPv6 DHCP Guard Policy to VLANs Globally

Beginning in privileged EXEC mode, follow these steps to attach an IPv6 DHCP Guard policy to VLANs across multiple interfaces:

SUMMARY STEPS



3. ipv6 dhcp guard [attach-policy policy_name]



27


How to Configure IPv6 Source Guard

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4


Purpose


Example:

Switch#



Specifies the VLANs to which the IPv6 Snooping policy will be attached ; enters the VLAN interface configuration mode.

Example:

Switch(config)#


ipv6 dhcp guard [attach-policy policy_name]

Example:



Attaches the IPv6 Neighbor Discovery policy to the specified

VLANs across all switch and stack interfaces. The default policy is attached if the attach-policy option is not used. The default policy is, device-role client, no trusted-port.


Example:

Switch#(config-if)#



Related Topics



SUMMARY STEPS

1. enable


3. [no] ipv6 source-guard policy policy_name

4. [deny global-autoconf] [permit link-local] [default{. . . }] [exit] [no{. . . }]

5. end

6. show ipv6 source-guard policy policy_name

DETAILED STEPS

Step 1

Command or Action enable

Purpose

Enables privileged EXEC mode. Enter your password if prompted.

28




Step 2

Step 3

Step 4

Step 5

Step 6


Example:

Switch>

enable configure terminal

Example:

Switch(config-sisf-sourceguard)#

end

show ipv6 source-guard policy policy_name


Example:

Switch#


[no] ipv6 source-guard policy policy_name Specifies the IPv6 Source Guard policy name and enters IPv6

Source Guard policy configuration mode.

Example:

Switch(config)#

ipv6 source-guard policy example_policy

[deny global-autoconf] [permit link-local]

[default{. . . }] [exit] [no{. . . }]

(Optional) Defines the IPv6 Source Guard policy.

Example:

Switch(config-sisf-sourceguard)#

deny global-autoconf

• deny global-autoconf—Denies data traffic from auto-configured global addresses. This is useful when all global addresses on a link are DHCP-assigned and the administrator wants to block hosts with self-configured addresses to send traffic.

• permit link-local—Allows all data traffic that is sourced by a link-local address.

end

Note

Trusted option under source guard policy is not supported.

Exits out of IPv6 Source Guard policy configuration mode.

Shows the policy configuration and all the interfaces where the policy is applied.

Example:

Switch#

show ipv6 source-guard policy example_policy

What to Do Next

Apply the IPv6 Source Guard policy to an interface.

Related Topics



29


How to Attach an IPv6 Source Guard Policy to an Interface

How to Attach an IPv6 Source Guard Policy to an Interface

SUMMARY STEPS

1. enable



4. ipv6 source-guard [attach-policy <policy_name> ]


DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Step 5


Purpose


Example:

Switch>



Example:

Switch#



Example:

Switch(config)#



ipv6 source-guard [attach-policy <policy_name> ]

Example:

Switch(config-if)#

ipv6 source-guard attach-policy example_policy

Attaches the IPv6 Source Guard policy to the interface.

The default policy is attached if the attach-policy option is not used.


Example:

Switch#(config-if)#



Related Topics


30



How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface

How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface

SUMMARY STEPS

1. enable


3. interface port-channel port-channel-number



DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Step 5


Purpose


Example:

Switch>



Example:

Switch#


interface port-channel port-channel-number Specifies an interface type and port number and places the switch in the port channel configuration mode.

Example:

Switch (config)#

interface Po4

ipv6 source-guard [attach-policy <policy_name> ] Attaches the IPv6 Source Guard policy to the interface.


Example:

Switch(config-if) #



Example:

Switch(config-if) #



Related Topics


Examples: How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface, on page 35


31


How to Configure IPv6 Prefix Guard

How to Configure IPv6 Prefix Guard

Note

To allow routing protocol control packets sourced by a link-local address when prefix guard is applied, enable the permit link-local command in the source-guard policy configuration mode.

SUMMARY STEPS

1. enable


3. [no] ipv6 source-guard policy source-guard-policy

4. [ no ] validate address

5. validate prefix

6. exit

7. show ipv6 source-guard policy [source-guard-policy]

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4


Purpose


Example:

Switch>



Example:

Switch#


[no] ipv6 source-guard policy source-guard-policy Defines an IPv6 source-guard policy name and enters switch integrated security features source-guard policy configuration mode.

Example:

Switch (config)#

ipv6 source-guard policy my_snooping_policy

[ no ] validate address

Example:

Switch (config-sisf-sourceguard)#

no validate address

Disables the validate address feature and enables the IPv6 prefix guard feature to be configured.

32



How to Attach an IPv6 Prefix Guard Policy to an Interface

Step 5

Step 6

Step 7

Command or Action Purpose validate prefix

Enables IPv6 source guard to perform the IPv6 prefix-guard operation.

Example:


validate prefix exit

Exits switch integrated security features source-guard policy configuration mode and returns to privileged EXEC mode.

Example:


exit

show ipv6 source-guard policy [source-guard-policy] Displays the IPv6 source-guard policy configuration.

Example:

Switch #

show ipv6 source-guard policy policy1

Related Topics


How to Attach an IPv6 Prefix Guard Policy to an Interface

SUMMARY STEPS

1. enable



4. ipv6 source-guard attach-policy policy_name


DETAILED STEPS

Step 1

Step 2


Example:

Switch>


Example:

Switch#


Purpose




33


How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface

Step 3

Step 4

Step 5



Example:

Switch(config)#


Purpose


ipv6 source-guard attach-policy policy_name

Example:

Switch(config-if)#


Attaches the IPv6 Source Guard policy to the interface.



Example:

Switch(config-if)#



Related Topics


How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface

SUMMARY STEPS

1. enable


3. interface port-channel port-channel-number



DETAILED STEPS

Step 1


Example:

Switch>

enable

Purpose


34



Configuration Examples for IPv6 First Hop Security

Step 2

Step 3

Step 4

Step 5


Purpose


Example:

Switch#


interface port-channel port-channel-number Specifies an interface type and port number and places the switch in the port channel configuration mode.

Example:

Switch (config)#

interface Po4

ipv6 source-guard [attach-policy <policy_name> ] Attaches the IPv6 Source Guard policy to the interface.


Example:

Switch(config-if)#



Example:

Switch(config-if)#



Related Topics


Examples: How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface, on page 36

Configuration Examples for IPv6 First Hop Security

Examples: How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel

Interface

The following example shows how to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface:

Switch# configure terminal

Switch(config)# ipv6 source-guard policy POL

Switch(config-sisf-sourceguard) # validate address switch(config-sisf-sourceguard)# exit

Switch(config)# interface Po4

Switch(config)# ipv6 snooping

Switch(config-if)# ipv6 source-guard attach-policy POL

Switch(config-if)# exit switch(config)#

Related Topics

How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface, on page 31


35


Examples: How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface

Examples: How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel

Interface

The following example shows how to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface:

Switch# configure terminal

Switch(config)# ipv6 source-guard policy POL

Switch (config-sisf-sourceguard)# no validate address

Switch((config-sisf-sourceguard)# validate prefix

Switch(config)# interface Po4

Switch(config-if)# ipv6 snooping

Switch(config-if)# ipv6 source-guard attach-policy POL

Related Topics

How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface, on page 34

Additional References

Related Documents

Related Topic

Implementing IPv6 Addressing and Basic Connectivity

IPv6 network management and security topics

IPv6 Command Reference

Document Title

http://www.cisco.com/en/US/docs/ ios-xml/ios/ipv6/configuration/

15-0sy/ip6-addrg-bsc-con.html

IPv6 Configuration Library, Cisco

IOS XE Release 3SE (Catalyst

3850 Switches) http://www.cisco.com/en/US/docs/ ios-xml/ios/ipv6/config_library/ xe-3se/3850/ ipv6-xe-3se-3850-library.html

IPv6 Command Reference, Cisco

IOS XE Release 3SE (Catalyst

3850 Switches) http://www.cisco.com/en/US/docs/ ios-xml/ios/ipv6/command/ ipv6-xe-3se-3850-cr-book.html

36




Error Message Decoder

Description

To help you research and resolve system error messages in this release, use the Error Message

Decoder tool.

Link

https://www.cisco.com/cgi-bin/Support/Errordecoder/ index.cgi

Technical Assistance

Description Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with

Cisco products and technologies.

http://www.cisco.com/support

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field

Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.


37



38


Configuring IPv6 First Hop Security

Configuring IPv6 First Hop Security

Finding Feature Information

Prerequisites for First Hop Security in IPv6

Restrictions for First Hop Security in IPv6

Information about First Hop Security in IPv6

How to Configure an IPv6 Snooping Policy

How to Attach an IPv6 Snooping Policy to an Interface

How to Attach an IPv6 Snooping Policy to a Layer 2 EtherChannel Interface

How to Attach an IPv6 Snooping Policy to VLANs Globally

How to Configure the IPv6 Binding Table Content

How to Configure an IPv6 Neighbor Discovery Inspection Policy

How to Attach an IPv6 Neighbor Discovery Inspection Policy to an Interface

How to Attach an IPv6 Neighbor Discovery Inspection Policy to a Layer 2

EtherChannel Interface

How to Attach an IPv6 Neighbor Discovery Inspection Policy to VLANs Globally

How to Configure an IPv6 Router Advertisement Guard Policy

How to Attach an IPv6 Router Advertisement Guard Policy to an Interface

How to Attach an IPv6 Router Advertisement Guard Policy to a Layer 2

EtherChannel Interface

How to Attach an IPv6 Router Advertisement Guard Policy to VLANs Globally

How to Configure an IPv6 DHCP Guard Policy

How to Attach an IPv6 DHCP Guard Policy to an Interface or a VLAN on an

Interface

How to Attach an IPv6 DHCP Guard Policy to a Layer 2 EtherChannel Interface

How to Attach an IPv6 DHCP Guard Policy to VLANs Globally

How to Configure IPv6 Source Guard

How to Attach an IPv6 Source Guard Policy to an Interface

How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel Interface

How to Configure IPv6 Prefix Guard

How to Attach an IPv6 Prefix Guard Policy to an Interface

How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel Interface

Configuration Examples for IPv6 First Hop Security

Examples: How to attach an IPv6 Source Guard Policy to a Layer 2 EtherChannel

Interface

Examples: How to attach an IPv6 Prefix Guard Policy to a Layer 2 EtherChannel

Interface

Additional References

Related manuals

Cisco

Catalyst IE3400 Rugged Series

Cisco

Catalyst 2960-X Series Switches

Cisco

5700 Series Wireless LAN Controllers

Cisco

IOS XE 3E

Cisco

Catalyst 2960-X Series Switches

Cisco

Catalyst 2960XR-48TS-I Switch

Cisco

IOS XE 3E

Cisco

Catalyst 2960XR-48TS-I Switch

Cisco

Catalyst 2960-L Series Switches