R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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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 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 for load
balancing.
[ ipv4-unicast topology-name ] maximum
load-balancing number
By default, the maximum
number of ECMP routes
is 8.
Configuring IS-IS route summarization
This task allows you to configure a summary route, so routes falling into 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.
[ ipv4-unicast topology-name ] 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.
Advertising a default route
A router running IS-IS cannot redistribute any default routes or advertise a default route to neighbors.
Perform this task to advertise a default route of 0.0.0.0/0 to the same level neighbors.
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:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A