prefix-priority (OSPFv3 view)

Function

The prefix-priority command sets a convergence priority for OSPFv3 routes.

The undo prefix-priority command restores the default value.

By default, in an OSPFv3 routing table, the convergence priority of public network 32-bit host routes and default routes is medium, and the convergence priority of other OSPFv3 routes is low; in an IP routing table, the convergence priority of public network 32-bit host routes and default routes is high, and the convergence priority of other OSPFv3 routes is medium.

Format

prefix-priority { critical | high | medium | very-low } ipv6-prefix ipv6-prefix-name

undo prefix-priority { critical | high | medium | very-low }

Parameters

Parameter	Description	Value
critical	Sets the convergence priority of OSPFv3 routes to critical.	-
high	Sets the convergence priority of OSPFv3 routes to high.	-
medium	Sets the convergence priority of OSPFv3 routes to medium.	-
very-low	Sets the convergence priority of OSPFv3 routes to very-low.	-
ipv6-prefix ipv6-prefix-name	Specifies the name of an IPv6 prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPFv3 view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

To set a convergence priority of OSPFv3 routes based on a specified IPv6 prefix list, run the prefix-priority command. The command takes effect on the public network only.

After the prefix-priority command is used in the OSPFv3 view, OSPFv3 route calculation, link-state advertisement (LSA) flooding, and LSDB synchronization can be implemented according to the configured priority, which accelerates route convergence.

Configuration Impact

The convergence priorities of OSPFv3 routes can be critical, high, medium, low, and very-low. The priorities in the corresponding IP routing table are critical, high, high, medium, and low. The priorities are listed in descending order.When an LSA meets multiple priorities, the highest priority takes effect.

OSPFv3 calculates LSAs in the sequence of intra-area routes, inter-area routes, and AS external routes. This command enables OSPFv3 to calculate the three types of routes separately according to the specified route calculation priorities. Convergence priorities are critical, high, medium, low and very-low. Tvery-o speed up the processing of LSAs with the higher priority, during LSA flooding, the LSAs need to be placed into the corresponding critical, high, medium, low and very-low queues according to priorities.

Precautions

By default, the convergence priorities of public OSPFv3 host routes, direct routes, static routes, and other protocol (such as BGP and RIP) routes are medium, high, medium, and low respectively. On the public network, OSPFv3 32-bit host routes are uniformly identified as medium.

Example

# Set the convergence priority of OSPFv3 routes of 2001:DB8:1::1/64 to critical.

<HUAWEI> system-view
[~HUAWEI] ip ipv6-prefix critical-prefix index 10 permit 2001:DB8:1::1 64
[*HUAWEI] ospfv3 1
[*HUAWEI-ospfv3-1] prefix-priority critical ipv6-prefix critical-prefix