ipv6 prefix-priority (IS-IS)
Function
The ipv6 prefix-priority command configures the convergence priority of IS-IS IPv6 routes.
The undo ipv6 prefix-priority command restores the default convergence priority of IS-IS IPv6 routes.
By default, the convergence priority of IS-IS IPv6 host routes and default routes is medium, and the convergence priority of other IS-IS IPv6 routes is low.
Format
ipv6 prefix-priority [ level-1 | level-2 ] { critical | high | medium } { ipv6-prefix prefix-name | tag tag-value }
undo ipv6 prefix-priority [ level-1 | level-2 ] { critical | high | medium }
Parameters
| Parameter | Description | Value |
|---|---|---|
level-1 |
Specifies the convergence priority of Level-1 IS-IS IPv6 routes. |
- |
level-2 |
Specifies the convergence priority of Level-2 IS-IS IPv6 routes. |
- |
critical |
Sets the convergence priority of IS-IS IPv6 routes to critical. |
- |
high |
Sets the convergence priority of IS-IS IPv6 routes to high. |
- |
medium |
Sets the convergence priority of IS-IS IPv6 routes to medium. |
- |
ipv6-prefix prefix-name |
Specifies the prefix name of IPv6 addresses for filtering routes to set the convergence priority for IS-IS IPv6 routes that match the specified IPv6 address prefix. |
The value of prefix-name is a string of 1 to 169 case-sensitive characters without spaces. |
tag tag-value |
Specifies the tag value used for filtering routes to set the convergence priority for IS-IS IPv6 routes that carry the specified tag value. To specify the tag value to filter the IPv6 routes that need to be set with the convergence priority, ensure that IS-IS IPv6 routes carry the tag value. |
The value is an integer that ranges from 1 to 4294967295. |
Usage Guidelines
This command takes effect only in IPv6 base topologies but not in VPNs.
The convergence priorities of IS-IS IPv6 routes are classified as critical, high, medium, and low in descending order.
The convergence priority of existing IS-IS IPv6 routes is re-set according to the configuration of the ipv6 prefix-priority command.
The convergence priority of new IS-IS IPv6 routes is set according to the filtering result of the ipv6 prefix-priority command.
If an IS-IS IPv6 route meets the matching rules specified in multiple commands that are used to configure convergence priorities, this IS-IS IPv6 route is of top convergence priority among the set convergence priorities.
no level is specified, the convergence priority is set for both Level-1 routes and Level-2 routes according to the configuration of the ipv6 prefix-priority command.
The ipv6 prefix-priority command can take effect only after IPv6 is enabled for the IS-IS process by the ipv6 enable command.
After the ipv6 prefix-priority command is run to set the convergence priority for IS-IS IPv6 routes (including IS-IS IPv6 host routes and default routes), the convergence priority of all the IS-IS IPv6 routes that meet the matching rules is changed according to the configuration of the ipv6 prefix-priority command, and the convergence priority of the IS-IS IPv6 routes that do not meet the matching rules is changed to low.