Configuring OSPFv3 Route Summarization

Context

Route summarization on a large-scale OSPFv3 network reduces the number of routing entries. This function minimizes system resource consumption while maintaining system performance. In addition, if a link in the summarized IPv6 address segment frequently alternates between Up and Down, the devices outside this address segment will not be affected by the link status transition. Route summarization therefore prevents route flapping and improves network stability.

Procedure

Configure inter-area route summarization on an ABR.
Perform the following operations on the ABR that runs OSPFv3.
1. Run system-view
  The system view is displayed.
2. Run ospfv3 [ process-id ]
  The OSPFv3 view is displayed.
3. Run area area-id
  The OSPFv3 area view is displayed.
4. Run abr-summary ipv6-address prefix-length [ cost cost | not-advertise ] ^*
  Route summarization for inter-area routes is configured.
Configure external route summarization on an ASBR.
Perform the following operations on the ASBR that runs OSPFv3.
1. Run system-view
  The system view is displayed.
2. Run ospfv3 [ process-id ]
  The OSPFv3 view is displayed.
3. Run asbr-summary ipv6-address prefix-length [ cost cost | tag tag | distribute-delay dist-delay-interval | not-advertise ] ^*
  Route summarization for imported routes is configured.