HP 6125XLG - Configuring IS-IS Route Summarization; Advertising a Default Route

120
Ste
p
Command
Remarks
3. Specify the maximum number
of ECMP routes.
maximum load-balancing number
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.
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:
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 ] *
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.
To advertise a default route:
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. Advertise a default
route.
default-route-advertise [ [ level-1 | level-1-2
| level-2 ] | route-policy route-policy-name ]
*
By default, IS-IS does not advertise
a default route.
The generated routes are
advertised to only the same-level
neighbors.