Configuring Is-Is Route Summarization; Advertising A Default Route - HP 6125XLG Configuration Manual

Step
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.
3. Advertise a default
route.
Command
maximum load-balancing number
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
summary ip-address { mask | mask-length }
[ 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 ]
default-route-advertise [ [ level-1 | level-1-2
| level-2 ] | route-policy route-policy-name ]
*
120
Remarks
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 IP Routing
Command Reference.
Remarks
N/A
N/A
By default, route summarization is
not configured.
Remarks
N/A
N/A
By default, IS-IS does not advertise
a default route.
The generated routes are
advertised to only the same-level
neighbors.