IP Routing: EIGRP Configuration Guide, Cisco IOS XE Release 3S
EIGRP IPv6 VRF-Lite
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EIGRP IPv6 VRF-Lite

The EIGRP IPv6 VRF-Lite feature provides EIGRP IPv6 support for multiple VRFs and simplifies the management and troubleshooting of traffic belonging to a specific VRF.


Note

The EIGRP IPv6 VRF-Lite feature is available only in EIGRP named configurations.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see 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 document.

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 EIGRP IPv6 VRF-Lite

VRF-Lite for EIGRP IPv6

The EIGRP IPv6 VRF-Lite feature provides separation between routing and forwarding, which supports an additional level of security because communication between devices belonging to different VRFs is not allowed, unless explicitly configured. While the EIGRP IPv6 VRF-Lite feature supports multiple VRFs, the feature also simplifies the management and troubleshooting of traffic belonging to a specific VRF.

Virtual Private Networks (VPNs) provide a secure way for customers to share bandwidth over a service provider backbone network. A VPN is a collection of sites sharing a common routing table. A customer site is connected to the service provider network by one or more interfaces, and the service provider associates each interface with a VPN routing table. A VPN routing table is called a VPN routing/forwarding (VRF) table.

VRF-lite allows a service provider to support two or more VPNs with an overlapping IP address using one interface. VRF-lite uses input interfaces to distinguish routes for different VPNs and forms virtual packet-forwarding tables by associating one or more Layer 3 interfaces with each VRF. Interfaces in a VRF can be either physical, such as Ethernet ports, or logical, such as VLAN SVIs, but a Layer 3 interface cannot belong to more than one VRF at any time.


Note

The EIGRP IPv6 VRF-Lite feature is available only in EIGRP named configurations.

EIGRP Named Configuration

Configuring the router eigrp command with the virtual-instance-name argument creates an EIGRP configuration referred to as the EIGRP named configuration or EIGRP named mode. An EIGRP named configuration does not create an EIGRP routing instance by itself; it is a base configuration that is required to define address-family configurations that are used for routing.

In EIGRP named configurations, EIGRP VPNs can be configured in IPv4 and IPv6 named configurations. A VRF instance and a route distinguisher must be defined before the address family session can be created.

A single EIGRP routing process can support multiple VRFs. The number of VRFs that can be configured is limited only by the available system resources on the device, which is determined by the number running processes and available memory. However, only a single VRF can be supported by each VPN, and redistribution between different VRFs is not supported.

How to Configure EIGRP IPv6 VRF-Lite

Enabling the EIGRP IPv6 VRF-Lite Named Configuration

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    router eigrp virtual-instance-name

    4.    address-family ipv6 vrf vrf-name autonomous-system autonomous-system-number

    5.    end


DETAILED STEPS
     Command or ActionPurpose
    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 router eigrp virtual-instance-name


    Example:
    Device(config)# router eigrp virtual-name1
     

    Configures the EIGRP routing process and enters router configuration mode.

     
    Step 4 address-family ipv6 vrf vrf-name autonomous-system autonomous-system-number


    Example:
    Device(config-router)# address-family ipv6 vrf vrf1 autonomous-system 45000
     

    Enables EIGRP IPv6 VRF-Lite and enters address family configuration mode.

     
    Step 5 end


    Example:
    Device(config-router-af)# end
     

    Exits address family configuration mode and returns to privileged EXEC mode.

     

    Configuration Examples for EIGRP IPv6 VRF-Lite

    Example: Enabling EIGRP IPv6 VRF-Lite—Named Configuration

    The following example shows how to enable the EIGRP IPv6 VRF-lite feature: 

    Device> enable
Device# configure terminal
Device(config)# vrf definition vrf1
Device(config-vrf)# rd 100:1
Device(config-vrf)# address-family ipv6
Device(config-vrf-af)# exit
Device(config-vrf)# exit
Device(config)# router eigrp virtual-name1
Device(config-router)# address-family ipv6 vrf vrf1 autonomous-system 45000
Device(config-router-af)#

    Additional References

    Related Documents

    Related Topic

    Document Title

    Cisco IOS commands

    Cisco IOS Master Command List, All Releases

    EIGRP commands

    Cisco IOS IP Routing: EIGRP Command Reference

    EIGRP FAQ

    EIGRP Frequently Asked Questions

    EIGRP Technology White Papers

    Enhanced Interior Gateway Routing Protocol

    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 EIGRP IPv6 VRF-Lite

    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 EIGRP IPv6 VRF-Lite

    Feature Name

    Releases

    Feature Information

    EIGRP IPv6 VRF-Lite

    The EIGRP IPv6 VRF-Lite feature provides EIGRP IPv6 support for multiple VRFs and simplifies the management and troubleshooting of traffic belonging to a specific VRF.

    Note   

    The EIGRP IPv6 VRF-Lite feature is available only in EIGRP named configurations.

    There are no new or modified commands for this feature.