H3C Technologies H3C S12500-X Series Switches - Manual (Page 149)

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Step Command Remarks
2. Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. Specify the maximum number
of ECMP routes.
maximum load-balancing number
By default, the maximum
number of ECMP routes is the
same as that configured in the
max-ecmp-num command.
For more information about the
max-ecmp-num command, see
Layer 3—IP Routing Command
Reference.
263B
Configuring IS-IS route summarization
Perform this task to summarize specific routes, including IS-IS routes and redistributed routes, into a single
route. Route summarization can reduce the routing table size and the LSDB scale.
Route summarization applies only to locally generated LSPs. The cost of the summary route is the lowest
one among the costs of the more-specific 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-length | mask }
[ avoid-feedback | generate_null0_route |
[ level-1 | level-1-2 | level-2 ] | tag tag ] *
By default, route summarization is
not configured.
264B
Advertising a default route
IS-IS cannot redistribute a default route to its neighbors. This task enables IS-IS to advertise a default route
of 0.0.0.0/0 in an LSP to the same-level neighbors. Upon receiving the default route, the neighbors add
it into their routing table.
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 [ [ level-1 | level-1-2
| level-2 ] | route-policy route-policy-name ]
*
By default, IS-IS does not advertise
a default route.