Configuring Is-Is Route Leaking; Tuning And Optimizing Is-Is Networks; Configuration Prerequisites - H3C S5800 Series Configuration Manual

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.

Tuning and Optimizing IS-IS Networks

Configuration Prerequisites

Before the configuration, accomplish the following tasks:
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 ] *
5-25
Remarks
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Required
Not configured by
default
Remarks
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Required
Disabled by
default