Enabling MT for IPv4 an IS-IS Interface
After IS-IS MT is enabled, associate a specified interface with MT instances so that specified links can participate in the SPF calculation for the topology instances.
Context
Various topology instances can be associated with one interface so that specified links of the interface can participate in the SPF calculation for the topology instances.
Cost of the interface in each topology instance
Administrative tag of the interface in each topology instance
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The physical interface view is displayed.
- Run ip topology topology-name enable
An IPv4 topology instance is enabled for the interface.
- Run isis topology topology-name
The interface is associated with the IS-IS IPv4 topology instance.
If You want to associate an interface with multiple IPv4 topology instances, repeat this step and specify different topology names.
- (Optional) Run isis topology topology-name cost cost [ level-1 | level-2 ]
A cost is configured for the interface in the IS-IS topology instance.
A cost change on an interface will trigger route reselection. Therefore, change the cost during network planning.
- (Optional) Run isis topology topology-name tag-value tag [ level-1 | level-2 ]
An administrative tag is configured for the interface in the IS-IS topology instance.
An administrative tag is carried in routes and used by route-policies to filter routes.
- Run commit
The configuration is committed.