Context
Route summarization on a large-scale OSPF network efficiently reduces routing entries. This
minimizes system resource consumption and maintains the system performance. In addition, if
a specific link frequently alternates between Up and Down, the links not involved in the route
summarization will not be affected. This prevents route flapping and improves the network
stability.
Perform the following steps on the switch running OSPF.
Procedure
l Configure ABR route summarization.
1. Run:
system-view
The system view is displayed.
2. Run:
ospf [ process-id ]
The OSPF process view is displayed.
3. Run:
area area-id
The OSPF area view is displayed.
4. Run:
abr-summary ip-address mask [ [ advertise | not-advertise ] | cost cost ]
*
ABR route summarization is configured.
l Configure ASBR route summarization.
1. Run:
system-view
The system view is displayed.
2. Run:
ospf [ process-id ]
The OSPF process view is displayed.
3. Run:
asbr-summary ip-address mask [ not-advertise | tag tag | cost cost |
distribute-delay interval ]
*
ASBR route summarization is configured.
NOTE
After route summarization is configured, the routing table on the local OSPF switch remains the
same. The routing table on another OSPF switch, however, contains only one summarized route, no
specific route. This summarized route is not removed until all specific routes are interrupted.
----End
4.6.5 Configuring OSPF to Filter Routes Received by OSPF
By configuring filtering conditions for the received routes, you can allow only the routes that
meet the filtering conditions to be added to the routing table.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 4 OSPF Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
112
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