Configuring Convergence Priorities for IPv4 IS-IS Routes
IS-IS routes with higher convergence priority converge preferentially when the network topology changes, which minimizes the impacts on critical services. This section describes how to configure convergence priorities for IS-IS routes.
Context
The NetEngine 8000 F allows you to configure the highest convergence priority for specific IS-IS routes so that those IS-IS routes converge first when a network topology changes.
Procedure
- Run system-view
The system view is displayed.
- Run isis [ process-id ]
The IS-IS view is displayed.
- Run prefix-priority [ level-1 | level-2 ] { critical | high | medium | very-low } { ip-prefix prefix-name | tag tag-value }
A convergence priority is configured for IS-IS routes.
The convergence priorities for IS-IS routes are used as follows:Existing IS-IS routes converge based on the priorities configured in the prefix-priority command.
New IS-IS routes that match the filtering rules converge based on the priorities configured in the prefix-priority command.
If an IS-IS route meets the matching rules of multiple convergence priorities, the highest convergence priority is used.
The convergence priority of Level-1 IS-IS routes is higher than that of Level-2 IS-IS routes.
If the route level is not specified, the configuration of the prefix-priority command takes effect on both Level-1 and Level-2 IS-IS routes.
The prefix-priority command is only applicable to the public network.
After the prefix-priority command is run, the convergence priority of 32-bit host routes is low, and the convergence priorities of the other routes are specified in the prefix-priority command.
- Run commit
The configuration is committed.