R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

146
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. Filter routes calculated
from received LSPs.
[ ipv4-unicast topology-name ] filter-policy
{ acl-number | ip-prefix ip-prefix-name |
route-policy route-policy-name } import
No filtering is configured by
default.
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:
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 the filtering of
routes redistributed from
another routing protocol or
IS-IS process.
[ ipv4-unicast topology-name ] filter-policy
{ acl-number | ip-prefix ip-prefix-name |
route-policy route-policy-name } export
[ protocol [ process-id ] ]
Not configured by
default.
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:
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. Enable IS-IS route
leaking.
[ 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 ] *
Disabled by
default.