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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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Configuring OSPFv3 Route Aggregation

Configuring OSPFv3 Route Aggregation

Context

If multiple continuous network segments exist in this area, use the abr-summary command to summarize them into one network segment. In this way, the ABR only sends an LSA after summarization. No LSA that belongs to the summarization network segment is separately transmitted, thus reducing the LSDB size of other areas.

When a large number of routes are imported, use the asbr-summary command to summarize the imported routes and set the delay for advertising the summarized route. In this manner, the summarized route advertised each time contains more valid routing information, and network flapping caused by incorrect routing information is avoided.

Procedure

  • Configure route summarization on an ABR.

    Do as follows 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 is configured in the OSPFv3 area.

      cost cost set the cost of a summarized route. By default, the cost of a summarized route is the maximum cost among those of routes that are summarized. The value ranges from 1 to 16777214.

      If not-advertise is set, no routing information of the network segment is advertised.

  • Configure route summarization on an ASBR.

    Do as follows 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 summary-prefix-length [ cost summary-cost | tag summary-tag | distribute-delay dist-delay-interval | not-advertise ] *

      Route summarization is configured on the ASBR.

      cost cost specifies the cost of a summarized route. By default, the cost of a summarized route is the maximum cost among those of routes that are summarized. The value ranges from 1 to 16777214.

      tag tag specifies the tag used to control route advertisement. The value of this parameter ranges from 0 to 4294967295.

      If not-advertise is specified in the command, the summarized IPv6 route that matches a specified IPv6 prefix or prefix length is not advertised.

      distribute-delay interval specifies the delay for advertising a summarized route.

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Updated: 2019-05-17

Document ID: EDOC1000174069

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