H3C Technologies H3C S10500 Series Switches - Manual (Page 168)

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Follow these steps to configure route summarization:
To do… Use the command... Remarks
Enter system view system-view —
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
—
Configure IS-IS route
summarization
summary ip-address { mask | mask-length }
[ avoid-feedback | generate_null0_route | tag
tag | [ level-1 | level-1-2 | level-2 ] ] *
Required
No route summarization is
configured by default.
NOTE:
•
The summary route cost is the lowest one among the costs of summarized routes.
• The router summarizes only the routes in the locally generated LSPs.
Advertising a default route
A router running IS-IS cannot redistribute any default routes or advertise a default route to neighbors. Use
the following commands to advertise a default route of 0.0.0.0/0 to the same level neighbors.
Follow these steps to advertise a default route:
To do… Use the command… Remarks
Enter system view system-view —
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
—
Advertise a default route
default-route-advertise [ route-policy
route-policy-name | [ level-1 | level-1-2 |
level-2 ] ] *
Required
The function is disabled by default.
NOTE:
The default route is only advertised to routers at the same level. You can use a routing policy to generate
the default route only when a local routing entry is matched by the policy.
Configuring IS-IS route redistribution
Redistributing large numbers of routes on a device may affect the performance of other devices in the
network. If this happens, you can configure a limit on the number of redistributed routes in order to limit
the number of routes to be advertised.
Follow these steps to configure IS-IS route redistribution from other routing protocols:
To do… Use the command… Remarks
Enter system view system-view —
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
—