Configuring Is-Is Route Leaking - HP MSR2000 series Configuration Manual

To filter routes calculated from received LSPs:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Filter routes calculated
from received LSPs.
Filtering redistributed routes
IS-IS can redistribute routes from other routing protocols (or other IS-IS processes), add them into the IS-IS
routing table, and advertise them in LSPs.
By reference a configured ACL, IP prefix list, or routing policy, you can filter redistributed routes and only
the routes matching the filter can be added into the IS-IS routing table and advertised to neighbors.
To configure the filtering of redistributed routes:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Configure the filtering of
routes redistributed from
another routing protocol or
IS-IS process.

Configuring IS-IS route leaking

With IS-IS route leaking enabled, the Level- 1 -2 router can advertise the routing information of other Level- 1
areas and Level-2 area routing information to Level- 1 routers.
If a filter policy is specified, only routes passing it can be advertised into Level- 1 area.
You can specify a routing policy in the import-route isis level-2 into level-1 command to filter routes from
Level-2 to Level- 1 . Other routing policies specified for route reception and redistribution does not affect the
route leaking.
To configure IS-IS route leaking:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Enable IS-IS route
leaking.
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
filter-policy { acl-number | ip-prefix
ip-prefix-name | route-policy route-policy-name }
import
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
filter-policy { acl-number | ip-prefix
ip-prefix-name | route-policy
route-policy-name } export [ protocol
[ process-id ] ]
Command
system-view
isis [ process-id ] [ vpn-instance vpn-instance-name ]
import-route isis level-2 into level-1 [ filter-policy
{ acl-number | ip-prefix ip-prefix-name | route-policy
route-policy-name } | tag tag ] *
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Remarks
N/A
N/A
By default, no filtering is
configured.
Remarks
N/A
N/A
Not configured by
default.
Remarks
N/A
N/A
Disabled by
default.