Configuring Is-Is Route Filtering; Configuring Is-Is Route Leaking - HPE 5800 Series Configuration Manual

Step
Configure the
4.
maximum number
of redistributed
Level 1/Level 2 IPv4
routes.

Configuring IS-IS route filtering

You can reference a configured ACL, IP prefix list, or routing policy to filter routes calculated from the
received LSPs and the routes redistributed from other routing protocols.
Filtering routes calculated from received LSPs
IS-IS saves the LSPs received from neighbors in the LSDB, uses the SPF algorithm to calculate the
shortest path tree with itself as the root, and installs the routes into the IS-IS routing table.
By referencing a configured ACL, IP prefix list, or routing policy, you can filter the calculated routes.
Only the routes matching the filter can be added into the IS-IS routing table.
To filter routes calculated from received LSPs:
Step
Enter system view.
1.
Enter IS-IS view.
2.
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.
Command
import-route limit number
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 ] ]
131
Remarks
Optional.
The default setting is 16384 for
the HPE 5800 Switch Series and
is 12288 for the HPE 5820X
Switch Series.
Remarks
N/A
N/A
No filtering is configured by
default.
Remarks
N/A
N/A
Not configured by
default.