Configuring Is-Is Route Redistribution; Configuring Is-Is Route Filtering - HP MSR2000 series Configuration Manual

The default route is only advertised to routers at the same level. You can use a routing policy to generate
the default route only when a local routing entry is matched by the policy.
To advertise a default route:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Advertise a default
route.

Configuring IS-IS route redistribution

Redistributing large numbers of routes on a device may affect the performance of other devices in the
network. If this happens, you can configure a limit on the number of redistributed routes in order to limit
the number of routes to be advertised.
Only active routes can be redistributed. Use the display ip routing-table protocol command to display
route state information.
To configure IS-IS route redistribution from other routing protocols:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Redistribute routes
from another
routing protocol.
4. Configure the
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.
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
default-route-advertise [ route-policy
route-policy-name | [ level-1 | level-1-2 |
level-2 ] ] *
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
import-route protocol [ process-id |
all-processes | allow-ibgp ] [ cost cost |
cost-type { external | internal } | [ level-1 |
level-1-2 | level-2 ] | route-policy
route-policy-name | tag tag ] *
import-route limit number
146
Remarks
N/A
N/A
By default, the function is disabled.
Remarks
N/A
N/A
By default:
•
No route is redistributed.
•
If no level is specified, routes
are redistributed into the Level-2
routing table.
Optional.
The default varies with devices.