R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

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Advertising a default route
A router running IS-IS cannot redistribute any default routes or advertise a default route to neighbors.
Perform this task to advertise a default route of 0.0.0.0/0 to the same level neighbors.
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:
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. Advertise a default
route.
default-route-advertise [ route-policy
route-policy-name | [ level-1 | level-1-2 |
level-2 ] ] *
By default, the function is disabled.
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:
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. Redistribute routes
from another routing
protocol.
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 ] *
No route is redistributed by
default.
If no level is specified, routes are
redistributed into the Level-2
routing table by default.
4. Configure the
maximum number of
redistributed Level
1/Level 2 IPv4
routes.
import-route limit number Optional.
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.