Configuring Convergence Priorities for IS-IS Routes
Context
You can configure the highest convergence priority for specific IS-IS routes so that these IS-IS routes will be converged first when a network topology changes.
Existing IS-IS routes are converged based on the priorities configured in the ipv6 prefix-priority command.
New IS-IS routes are converged based on the priorities configured in the ipv6 prefix-priority command.
If an IS-IS route conforms to the matching rules of multiple convergence priorities, the highest convergence priority is used.
The convergence priority of a Level-1 IS-IS route is higher than that of a Level-2 IS-IS route.
Procedure
- Run:
system-viewThe system view is displayed.
- Run:
isis [ process-id ]
The IS-IS view is displayed.
- Run:
ipv6 prefix-priority [ level-1 | level-2 ] { critical | high | medium } { ipv6-prefix prefix-name | tag tag-value }
Convergence priorities are set for IS-IS routes.
By default, the convergence priority of 32-bit host routes is medium, and the convergence priority of the other IS-IS routes is low.
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NOTE: The ipv6 prefix-priority command is only applicable to the public network.
After the ipv6 prefix-priority command is run, the convergence priority of 32-bit host routes is low, and the convergence priorities of the other routes are determined as specified in the ipv6 prefix-priority command.
- (Optional) Run:
quitThe system view is displayed.
- (Optional) Run:
ipv6 route prefix-priority-scheduler critical-weight high-weight medium-weight low-weight
The preference-based scheduling ratio of IPv6 routes is configured.
By default, the preference-based scheduling ratio of IPv6 routes is 8:4:2:1.
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