Enabling MT for an IPv6 IS-IS Process
Based on service requirements and the network plan, an IS-IS process can be associated with various topology instances so that multiple logical topologies are deployed in an IS-IS AS.
Context
You can associate an IS-IS process with unicast or multicast topology instances as required so that the SPF calculation can be performed for the topology instances in the IS-IS process. Then, you can configure parameters, such as the interface cost and protocol priority for the topology instances.
The configuration in an IS-IS topology instance view takes effect only on the topology instance. Therefore, you can configure different features and parameters for different topology instances as required.
Procedure
- Run system-view
The system view is displayed.
- Run ipv6 topology topology-name
An IPv6 topology instance is configured.
- Run isis [ process-id ]
The IS-IS view is displayed.
- Run cost-style { wide | wide-compatible }The cost style of packets sent and received by the router is set to wide or wide-compatible.
Go to Step 5 or Step 6 as required.- If the router supports only unicast services, go to Step 5.
- If the router supports only multicast services, go to Step 6.
- If the router supports both unicast and multicast services, perform the following steps.
- Run ipv6 topology topology-name topology-id topology-id
The IS-IS process is associated with a specified unicast topology instance, and the IS-IS IPv6 unicast topology view is displayed.
- Run ipv6 topology topology-name topology-id multicast
The IS-IS process is associated with a specified multicast topology instance, and the IS-IS multicast topology instance view is displayed.
- (Optional) Configure IS-IS features for IPv6 topology instances using the following commands:
To set the priority of IS-IS, run the ipv6 preference command.
To enable an IS-IS device to generate a default route, run the default-route-advertise command.
To enable an IS-IS device to import routes from other routing protocols in the IS-IS view, run the ipv6 import-route command.
To control IS-IS route leaking from a Level-1 area to a Level-2 area, run the ipv6 import-route isis level-1 into level-2 command.
To control IS-IS route leaking from a Level-2 area to a Level-1 area, run the ipv6 import-route isis level-2 into level-1 command.
To enable IS-IS summarization, run the summary command.
- Run commit
The configuration is committed.