Configuring Is-Is Route Leaking; Tuning And Optimizing Is-Is Networks; Configuration Prerequisites - HPE FlexNetwork HSR6800 Configuration Manual

Step
Filter routes
3.
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
Enter system view.
1.
Enter IS-IS view.
2.
Configure the filtering of
3.
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
Enter system view.
1.
Enter IS-IS view.
2.
Enable IS-IS route
3.
leaking.

Tuning and optimizing IS-IS networks

Configuration prerequisites

Before the configuration, complete the following tasks:
Command
[ ipv4-unicast topology-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 ]
[ ipv4-unicast topology-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 ]
[ ipv4-unicast topology-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 ] *
139
Remarks
No filtering is configured by
default.
Remarks
N/A
N/A
Not configured by
default.
Remarks
N/A
N/A
Disabled by
default.