Configuring for external route redistribution in an OSPFv3 domain

Configuring route redistribution for OSPFv3 establishes the routing switch as an ASBR (residing in a backbone, normal, or NSSA) for importing and translating different protocol routes from other IGP domains into an OSPFv3 domain. The switches support redistribution for static routes and directly connected routes. When you configure redistribution for OSPF, you can specify that static or connected routes external to the OSPFv3 domain are imported as OSPFv3 routes. The steps for configuring external route redistribution to support ASBR operation include the following:

  1. Optional: Configure route-maps to permit and/or deny route prefixes for redistribution in your OSPFv3 domain.
  2. Enable route redistribution.
  3. Optional: Modify the default metric for redistribution.
  4. Optional: Modify the redistribution metric type.
  5. Optional: Change the administrative distance setting.

    In the default configuration, redistribution is permitted for all routes from supported sources.

    Enable redistribution after you have configured route-maps defining the route policies you want to apply to route redistribution in the OSPFv3 domain. Otherwise, your AS may become overloaded with routes that you did not intend to redistribute.