H3C Technologies H3C S12500 Series Switches - Manual (Page 167)

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Step Command Remarks
3. Specify the maximum
number of ECMP
routes for load
balancing.
maximum load-balancing number
By default, the maximum number of
ECMP routes for load balancing is 32.
Configuring IS-IS route summarization
This task is to configure a summary route, so routes within the network range of the summary route are
summarized into one route for advertisement. Doing so can reduce the size of routing tables, as well as
the scale of LSP and LSDB. Both IS-IS routes and redistributed routes can be summarized.
The router summarizes only the routes in the locally generated LSPs. The cost of the summary route is the
lowest one among the costs of summarized routes.
To configure route summarization:
Step Command Remarks
1. Enter system
view.
system-view N/A
2. Enter IS-IS view. isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. 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 ] ] *
By default, no route summarization
is configured.
Advertising a default route
A router running IS-IS cannot redistribute any default routes or advertise a default route to other
neighbors. Perform this task to advertise a default route of 0.0.0.0/0 to the same level neighbors.
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.
To advertise a default route:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. Advertise a default
route.
default-route-advertise [ route-policy
route-policy-name | [ level-1 | level-1-2 |
level-2 ] ] *
By default, the function is disabled.