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IPv6 - GLBP Configuration Example



    First Hop Redudancy for IPv6 can be achieved via different protocols like HSRP, GLBP or VRRP. The Gateway Load Balancing Protocol (GLBP) feature provides automatic router backup for IPv6 hosts configured with a single default gateway on an IEEE 802.3 LAN. GLBP provides benefits of Load Sharing, Multiple Virtual Routers, Preemption and Authentication.


    1. IPv6 Addressing Scheme
    2. Understaing of First Hop Redudancy Routinng Protocols


    In this document, Gateway Load Balancing Protocol (GLBP) is configured on the LAN interface (FastEthernet 0/0) of Router R3 and R4. These two routers are advertised with a IPv6 network of 1111:11:11:11::11/64 by ISP-Router. As both the routers have reachability to ISP-Router, they are acting as a gateway to reach ISP network and providing redundancy.


    The virtual IPv6 address used is FE80::260:3EFF:FE11:6770 by command glbp 11 ipv6 FE80::260:3EFF:FE11:6770. Router R2 acting as a host is configured with a default static route pointing toward the Virtual IPv6 Address. The command is ipv6 route ::/0 FastEthernet0/0 FE80::260:3EFF:FE11:6770.

    Summary Steps

    Router# conf t

    Router(config)# interface FastEthernet0/0

    Router(config-if)# ipv6 address 2011:ABC:11:11::3/64

    Router(config-if)#  glbp 11 ipv6 FE80::260:3EFF:FE11:6770

    Router(config-if)#  glbp 11 priority 200

    Router(config-if)#  glbp 11 preempt


    Note: All configurations are tested on Cisco 3745 Router running IOS 12.4(15)T advance ip services (c3745-advipservicesk9-mz.124-15.T14).

    Topology Diagram



    Interface Configuration


    Router Configuration

    Please see the attached files for complete configuration.

    Verification Commands

    show glbp


    ping ipv6


    Note: The host,R2, is able to reach the ISP network 1111:11:11:11::11.

    debug ipv6 packet

    Please see attached file


    Cisco Solutions - IPv6

    Configuring Fist Hop Redundancy Protocols in IPv6

    IPv6 Frequently Asked Questions

    Version history
    Revision #:
    2 of 2
    Last update:
    ‎08-24-2017 12:44 AM
    Updated by:
    New Member

    Great's to the point. 

    New Member

    Thanks for sharing a great example,nicely done.



    Thanks for your kind words!