Configuring Is-Is Route Summarization; Advertising A Default Route - HP 6125XLG Layer 3 - Ip Routing Configuration Manual

Step
1. Enter system view.
2. Enter IS-IS view.
3. Specify the maximum number
of ECMP routes.

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
1. Enter system view.
2. Enter IS-IS view.
3. Configure IS-IS route
summarization.

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
1. Enter system view.
2. Enter IS-IS view.
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
maximum load-balancing number
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
summary ip-address { mask-length | mask }
[ avoid-feedback | generate_null0_route |
[ level-1 | level-1-2 | level-2 ] | tag tag ] *
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
138
Remarks
N/A
N/A
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.
Remarks
N/A
N/A
By default, route summarization is
not configured.
Remarks
N/A
N/A