R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

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Specifying a priority for IS-IS
A router can run multiple routing protocols. When routes to the same destination are found by multiple
routing protocols, the route learned by the protocol with the highest priority is adopted. You can
reference a routing policy to specify a priority for specific routes. For information about routing policy,
see "Configuring routing policies."
To configure the priority of IS-IS:
Ste
p
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 a priority for IS-IS.
preference { route-policy route-policy-name |
preference } *
15 by default.
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:
Ste
p
Command
1. Enter system view.
system-view
2. Enter IS-IS view.
isis [ process-id ] [ vpn-instance vpn-instance-name ]
3. Specify the maximum number of ECMP
routes for load balancing.
maximum load-balancing number
Configuring IS-IS route summarization
This task allows you 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:
Ste
p
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 |
[ level-1 | level-1-2 | level-2 | tag tag ] *
No route summarization is
configured by default.