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<Sysname> system-view
[Sysname] isis
[Sysname-isis-1] spf-slice-size 1000
summary (IS-IS view)
Syntax summary ip-address { mask | mask-length } [ avoid-feedback | generate_null0_route
| tag tag | [ level-1 | level-1-2 | level-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-2 routes 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.