Configuring Is-Is Route Leaking - H3C LS-3100-52P-OVS-H3 Operation Manual

To do...
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.
Follow these steps to configure the filtering of redistributed routes:
To do...
Enter system view
Enter IS-IS view
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.
Follow these steps to configure IS-IS route leaking:
To do...
Enter system view
Enter IS-IS view
Enable IS-IS route
leaking
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.
Use the command...
filter-policy { acl-number | ip-prefix
ip-prefix-name | route-policy
route-policy-name } import
Use the 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 ] ]
Use the 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 ] *
1-22
Remarks
Required
No filtering is configured
by default.
Remarks
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Required
Not configured by
default
Remarks
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Required
Disabled by
default