qos convergent-precedence cos high

Function

The qos convergent-precedence cos high command configures specific low-priority queues on a board as high-priority queues.

The undo qos convergent-precedence cos high command restores the default configurations on the board.

By default, the BE, AF1, AF2, AF3, and AF4 queues are low-priority queues and can be configured as high-priority queues. The EF, CS6, and CS7 queues are high-priority queues and cannot be changed.

Format

qos convergent-precedence cos start-cos-value [ to end-cos-value ] high

undo qos convergent-precedence cos start-cos-value [ to end-cos-value ] high

Parameters

Parameter	Description	Value
start-cos-value	Specifies the CoS value of the start queue.	The value is an integer ranging from 0 to 4, corresponding to the BE, AF1, AF2, AF3, and AF4 queues.
to end-cos-value	Specifies the CoS value of the end queue.	The value is an integer ranging from 0 to 4, corresponding to the BE, AF1, AF2, AF3, and AF4 queues. end-cos-value cannot be smaller than start-cos-value.
high	Indicates high-priority queues.	-

Parameter

Description

Value

start-cos-value

Specifies the CoS value of the start queue.

The value is an integer ranging from 0 to 4, corresponding to the BE, AF1, AF2, AF3, and AF4 queues.

to end-cos-value

Specifies the CoS value of the end queue.

The value is an integer ranging from 0 to 4, corresponding to the BE, AF1, AF2, AF3, and AF4 queues. end-cos-value cannot be smaller than start-cos-value.

high

Indicates high-priority queues.

Views

Slot view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
qos	write

Usage Guidelines

To prevent packet loss during network congestion, run the qos convergent-precedence cos high command to configure high-priority scheduling for queues on a board.

Example

# Configure the AF1 queue on the board in slot 1 as a high-priority queue.

<HUAWEI> system-view
[~HUAWEI] slot 1
[*HUAWEI-slot-1] qos convergent-precedence cos 1 high