Configure an ASBR Router

Routers that act as gateways (redistribution) between OSPF and other routing protocols (IGRP, EIGRP, RIP, BGP, static) or other instances of the OSPF routing process, are called ASBRs. An ASBR must be enabled for routes to be redistributed from other protocols.

This example configures router 10.0.0.1 to act as an ASBR.

1. Configure a router as an ASBR.

   SEFOS(config)# ipv6 router ospf
   SEFOS(config-router)# asbr router
   SEFOS(config-router)# end
   

2. Ensure that the router is configured as an ASBR.

   SEFOS# show ipv6 ospf
    
    Router Id: 10.0.0.1            ABR Type:  Standard ABR
    SPF schedule delay: 5 secs     Hold time between two SPFs: 10 secs
    Exit Overflow Interval: 0      Ref BW: 100000         Ext Lsdb Limit: -1
    Trace Value: 0x00000800        As Scope Lsa: 0        Checksum Sum: 0x0
    Demand Circuit: Enable             Passive Interface: Disable
    Nssa Asbr Default Route Translation: Disable
    It is an Area Border Router
    Autonomous System Boundary Router
    Number of Areas in this router  2
               Area      0.0.0.0
       Number of interfaces in this area is  1
       Number of Area Scope Lsa: 5      Checksum Sum: 0x2caf7
       Number of Indication Lsa: 0      SPF algorithm executed:  7 times
               Area      0.0.0.6
       Number of interfaces in this area is  1
       Number of Area Scope Lsa: 5      Checksum Sum: 0x3507d
       Number of Indication Lsa: 0      SPF algorithm executed:  7 times