3Com MSR 50, MSR 30 manual Summary IS-IS view, 1083

1083

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] spf-slice-size 1000

summary (IS-IS view)

Syntax summary ip-address { mask mask-length } [ avoid-feedbackgenerate_null0_route tag tag [ level-1level-1-2level-2] ] *

undo summary ip-address{ mask mask-length} [ level-1 level-1-2 level-2 ]

View IS-IS view

Parameters ip-address: Destination IP address of a summary route.

mask: Mask of the destination IP address, in dotted decimal format.

mask-length: Mask length, in the range of 0 to 32.

avoid-feedback: Specifies to avoid learning aggregate routes by routing calculation.

generate_null0_route: Specifies to generate the Null 0 route to avoid routing loops.

tag tag: Specifies a management tag, in the range of 1 to 4294967295.

level-1: Specifies to summarize only the routes redistributed to Level-1 area.

level-1-2: Specifies to summarize all the routes redistributed to the Level-1 and Level-2 areas.

level-2: Specifies to summarize only the routes redistributed to the Level-2 area.

Description Use the summary command to configure a summary route.

Use the undo summary command to remove a summary route.

No summarization is configured by default.

If no level is specified, only the level-2routes will be summarized by default.

You can summarize multiple contiguous networks with a summary network to reduce the size of the routing table, as well as that of LSP and LSDB generated by the router. It is allowed to summarize native IS-IS routes and redistributed routes. After summarization, the cost of the summary route is the smallest cost of those summarized routes.

Note that the router summarizes only routes in local LSPs.

Examples # Configure a summary route 202.0.0.0/8.