136
Step Command Remarks
3. Configure a preference for
IS-IS.
preference
{ preference |
route-policy
route-policy-name } *
The default setting is
15.
Configuring the maximum number of ECMP routes
Perform this task to implement load sharing over ECMP routes.
To configure the maximum number of ECMP routes:
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. Specify the maximum
number of ECMP routes.
maximum load-balancing
number
By default, the maximum
number of IS-IS ECMP routes
equals the maximum number
of ECMP routes supported by
the system.
Use the
max-ecmp-num
command to configure the
maximum number of ECMP
routes supported by the
system. For more information
about the
max-ecmp-num
command, see Layer 3—IP
Routing Command Reference.
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.
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.
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