summary (IS-IS view)

Use summary to configure a summary route.

Use undo summary to remove a summary route.

Syntax

summary ip-address { mask-length | mask } [ avoid-feedback | generate_null0_route | [ level-1 | level-1-2 | level-2 ] | tag tag ] *

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

Default

No summarization is configured.

Views

IS-IS view

Predefined user roles

network-admin

mdc-admin

Parameters

ip-address: Specifies the destination IP address of the summary route.

mask-length: Specifies the mask length of the summary route, in the range of 0 to 32.

mask: Specifies the mask of the destination IP address, in dotted decimal notation.

avoid-feedback: Avoids learning summary routes by route calculation.

generate_null0_route: Generates the Null 0 route to avoid routing loops.

level-1: Summarizes only the routes redistributed to Level-1.

level-1-2: Summarizes the routes redistributed to both Level-1 and Level-2.

level-2: Summarizes only the routes redistributed to Level-2.

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

Usage guidelines

If no level is specified, only level-2 routes are summarized.

If no topology is specified, routes for the base topology are summarized.

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

The router summarizes only routes generated from local LSPs.

Examples

# Configure a summary route of 202.0.0.0/8.

<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] summary 202.0.0.0 255.0.0.0