IPv6 Device Tracking

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Updated:October 15, 2012

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IPv6 Device Tracking

Contents

IPv6 Device Tracking

Last Updated: October 9, 2012

IPv6 device tracking provides IPv6 host liveness tracking so that a neighbor table can be immediately updated when an IPv6 host disappears.

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 www.cisco.com/go/cfn. An account on Cisco.com is not required.

Information About IPv6 Device Tracking

IPv6 First-Hop Security Binding Table

A database table of IPv6 neighbors connected to the device is created from information sources such as Neighbor Discovery Protocol (NDP) snooping. This database, or binding, table is used by various IPv6 guard features 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 Device Tracking

The IPv6 Device Tracking feature provides IPv6 host liveness tracking so that a neighbor table can be immediately updated when an IPv6 host disappears. The feature tracks the liveness of the neighbors connected through the Layer 2 device on a regular basis in order to revoke network access privileges as they become inactive.

How to Configure IPv6 Device Tracking

Configuring IPv6 Binding Table Content

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ipv6 neighbor binding vlan vlan-id {interface type number | ipv6-address | mac-address} [tracking [disable | enable | retry-interval value] | reachable-lifetime value]

4.    ipv6 neighbor binding max-entries entries [vlan-limit number | interface-limit number | mac-limit number]

5.    ipv6 neighbor binding logging

6.    exit

7.    show ipv6 neighbor binding [vlan vlan-id | interface type number | ipv6 ipv6-address | mac mac-address]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
ipv6 neighbor binding vlan vlan-id {interface type number | ipv6-address | mac-address} [tracking [disable | enable | retry-interval value] | reachable-lifetime value]


Example:

Device(config)# ipv6 neighbor binding vlan 100 interface Ethernet 0/0 reachable-lifetime 100

 

Adds a static entry to the binding table database.

 
Step 4
ipv6 neighbor binding max-entries entries [vlan-limit number | interface-limit number | mac-limit number]


Example:

Device(config)# ipv6 neighbor binding max-entries 100

 

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

 
Step 5
ipv6 neighbor binding logging


Example:

Device(config)# ipv6 neighbor binding logging

 

Enables the logging of binding table main events.

 
Step 6
exit


Example:

Device(config)# exit

 

Exits global configuration mode and enters privileged EXEC mode.

 
Step 7
show ipv6 neighbor binding [vlan vlan-id | interface type number | ipv6 ipv6-address | mac mac-address]


Example:

Device# show ipv6 neighbor binding

 

Displays the contents of a binding table.

 

Configuring IPv6 Device Tracking

Perform this task to provide fine tuning for the life cycle of an entry in the binding table for the IPv6 Device Tracking feature. For IPv6 device tracking to work, the binding table needs to be populated.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ipv6 neighbor tracking [retry-interval value]


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Device> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Device# configure terminal

 

Enters global configuration mode.

 
Step 3
ipv6 neighbor tracking [retry-interval value]


Example:

Device(config)# ipv6 neighbor tracking

 

Tracks entries in the binding table.

 

Configuration Examples for IPv6 Device Tracking

Example: Verifying IPv6 Device Tracking

Device# show ipv6 neighbor tracking

    IPv6 address               Link-Layer addr Interface vlan prlvl age   state      Time left
ND  FE80::A8BB:CCFF:FE01:F500  AABB.CC01.F500  Et0/0     100  0002    0   REACHABLE  8850
L   FE80::21D:71FF:FE99:4900   001D.7199.4900  Vl100     100  0080 7203   DOWN       N/A
ND  2001:600::1                AABB.CC01.F500  Et0/0     100  0003    0   REACHABLE  3181
ND  2001:300::1                AABB.CC01.F500  Et0/0     100  0007    0   REACHABLE  9559
L   2001:400::1                001D.7199.4900  Vl100     100  0080 7188   DOWN       N/A

Additional References

Related Documents

Related Topic Document Title

IPv6 addressing and connectivity

IPv6 Configuration Guide

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

IPv6 commands

Cisco IOS IPv6 Command Reference

Cisco IOS IPv6 features

Cisco IOS IPv6 Feature Mapping

Standards and RFCs

Standard/RFC Title

RFCs for IPv6

IPv6 RFCs

MIBs

MIB

MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

Technical Assistance

Description Link

The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for IPv6 Device Tracking

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Table 1 Feature Information for IPv6 Device Tracking
Feature Name Releases Feature Information

IPv6 Device Tracking

12.2(50)SY

15.0(1)SY

15.0(2)SE

IPv6 device tracking provides IPv6 host liveness tracking so that a neighbor table can be immediately updated when an IPv6 host disappears.

The following commands were introduced or modified: ipv6 neighbor binding logging, ipv6 neighbor binding max-entries, ipv6 neighbor binding vlan, ipv6 neighbor tracking, show ipv6 neighbor binding, show ipv6 neighbor tracking.

Glossary

  • CA--certification authority.
  • CGA--cryptographically generated address.
  • CPA--certificate path answer.
  • CPR--certificate path response.
  • CPS--certification path solicitation. The solicitation message used in the addressing process.
  • CRL--certificate revocation list.
  • CS--certification server.
  • CSR--certificate signing request.
  • DAD--duplicate address detection. A mechanism that ensures two IPv6 nodes on the same link are not using the same address.
  • DER--distinguished encoding rules. An encoding scheme for data values.
  • nonce--An unpredictable random or pseudorandom number generated by a node and used once. In SeND, nonces are used to ensure that a particular advertisement is linked to the solicitation that triggered it.
  • non-SeND node--An IPv6 node that does not implement SeND but uses only the Neighbor Discovery Protocol without security.
  • NUD--neighbor unreachability detection. A mechanism used for tracking neighbor reachability.
  • PACL--port-based access list.
  • PKI--public key infrastructure.
  • RA--router advertisement.
  • RD--Router discovery allows the hosts to discover what devices exist on the link and what subnet prefixes are available. Router discovery is a part of the Neighbor Discovery Protocol.
  • Router Authorization Certificate--A public key certificate.
  • SeND node--An IPv6 node that implements SeND.
  • trust anchor--An entity that the host trusts to authorize devices to act as devices. Hosts are configured with a set of trust anchors to protect device discovery.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

© 2012 Cisco Systems, Inc. All rights reserved.

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