Configuring Is-Is Route Redistribution; Configuring Is-Is Route Filtering - HPE FlexNetwork HSR6800 Configuration Manual

Step
Advertise a default
3.
route.

Configuring IS-IS route redistribution

Redistributing large numbers of routes on a device might 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. To verify route state, use the display ip routing-table
protocol command.
To configure IS-IS route redistribution from other routing protocols:
Step
Enter system view.
1.
Enter IS-IS view.
2.
Redistribute routes
3.
from another routing
protocol.
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.
Command
[ ipv4-unicast topology-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 ]
[ ipv4-unicast topology-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
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
138
Remarks
By default, the function is
disabled.
Remarks
N/A
N/A
No route is redistributed by
default.
If no level is specified, routes are
redistributed into the Level-2
routing table by default.
Optional.
By default, the maximum number
of redistributed Level 1/Level 2
IPv4 routes is 500000.
Remarks
N/A
N/A