Configuring Ipv6 Is-Is Route Summarization - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing

7.14 Configuring IPv6 IS-IS Route Summarization

To improve the route searching efficiency and simplify route management on a large-scale IS-
IS network, configure IS-IS route summarization to reduce the number of IS-IS routes in a
routing table.
Context
Route summarization is used to summarize routes with the same IP prefix into one route.
On a large-scale IS-IS network, route summarization can be configured to reduce the number
of IS-IS routes in a routing table. This summarization improves the usage of system resources
and facilitates route management.
If a link on an IP network segment that is summarized frequently alternates between Up and
Down states, IP network segments that are not summarized will not be affected, preventing route
flapping and improving the network stability.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
isis [ process-id ]
The IS-IS view is displayed.
Step 3 Run:
ipv6 summary
tag tag | [ level-1 | level-1-2 | level-2 ] ]
The specified IS-IS routes are summarized into one IS-IS route.
----End
Checking the Configurations
After the route summarization function is configured, perform the following steps to check
whether the route summarization function has taken effect.
l
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Issue 02 (2014-09-30)
ipv6-address prefix-length [ avoid-feedback | generate_null0_route |
NOTE
After route summarization is configured on an IS, the local routing table still contains all specific routes
before the summarization.
The routing tables on other ISs contain only the summary route, and the summary route is deleted only
after all its specific routes are deleted.
Run the display isis route command to check summary routes in the IS-IS routing table.
Run the display ipv6 routing-table [ verbose ] command to check summary routes in the
IP routing table.
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7 IS-IS Configuration
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