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Command Reference

CloudEngine 8800, 7800, 6800, and 5800 V200R002C50

This document describes all the configuration commands of the device, including the command function, syntax, parameters, views, default level, usage guidelines, examples, and related commands.
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prefix-priority (OSPFv3)

prefix-priority (OSPFv3)

Function

The prefix-priority command sets the convergence priority of OSPFv3 routes.

The undo prefix-priority command restores the default convergence priority of OSPFv3 routes.

By default, the convergence priority of public 32-bit host routes is medium, and the convergence of other OSPFv3 routes is low.

Format

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

undo prefix-priority { critical | high | medium }

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. -
ipv6-prefix Matches OSPFv3 routes according to the IPv6 prefix list. -
ipv6-prefix-name Specifies the name of an IPv6 prefix list. The name is a string of 1 to 169 case-sensitive characters except spaces. When double quotation marks are used to include the string, spaces are allowed in the string.

Views

OSPFv3 view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The prefix-priority command sets the convergence priority of OSPFv3 routes according to the specified IP prefix list name, and 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

When an LSA meets multiple priorities, the highest priority takes effect.

With the prefix-priority command, OSPFv3 can calculate and flood LSAs, and synchronize LSDBs according to priorities. This speeds up route convergence. OSPFv3 calculates LSAs in the sequence of intra-area routes, inter-area routes, and AS external routes. This command makes OSPFv3 calculate the three types of routes separately according to the specified route calculation priorities. Convergence priorities are critical, high, medium, and low. To 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, and 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. In the public network, OSPFv3 32-bit host routes are uniformly identified as medium.

Example

# Set the convergence priority of OSPFv3 routes of 10.0.0.0/8 to critical.

<HUAWEI> system-view
[~HUAWEI] ip ipv6-prefix abc permit :: 0 greater-equal 32 less-equal 64
[*HUAWEI] ospfv3 1
[*HUAWEI-ospfv3-1] prefix-priority critical ipv6-prefix critical-prefix
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Updated: 2019-03-21

Document ID: EDOC1000166501

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