if-match dscp

Function

The if-match dscp command configures a matching rule based on the Differentiated Services Code Point (DSCP) priority of packets in a traffic classifier.

The undo if-match dscp command deletes a matching rule based on the DSCP priority of packets in a traffic classifier.

By default, a matching rule based on the DSCP priority of packets is not configured in a traffic classifier.

Format

if-match dscp dscp-value &<1-8>

undo if-match dscp

Parameters

Parameter	Description	Value
dscp dscp-value	Specifies the DSCP priority.	The value can be a DiffServ code, an integer ranging from 0 to 63, or the name of the DSCP service type such as af11, af12, af13, af21, af22, af23, af31, af32, af33, af41, af42, af43, cs1-cs7, default, and ef. The values corresponding to service types are as follows: af11: 10 af12: 12 af13: 14 af21: 18 af22: 20 af23: 22 af31: 26 af32: 28 af33: 30 af41: 34 af42: 36 af43: 38 cs1: 8 cs2: 16 cs3: 24 cs4: 32 cs5: 40 cs6: 48 cs7: 56 default: 0 ef: 46

Parameter

Description

Value

dscp dscp-value

Specifies the DSCP priority.

The value can be a DiffServ code, an integer ranging from 0 to 63, or the name of the DSCP service type such as af11, af12, af13, af21, af22, af23, af31, af32, af33, af41, af42, af43, cs1-cs7, default, and ef.

The values corresponding to service types are as follows:

af11: 10
af12: 12
af13: 14
af21: 18
af22: 20
af23: 22
af31: 26
af32: 28
af33: 30
af41: 34
af42: 36
af43: 38
cs1: 8
cs2: 16
cs3: 24
cs4: 32
cs5: 40
cs6: 48
cs7: 56
default: 0
ef: 46

Views

Traffic classifier view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

You can run the if-match dscp command to classify packets based on the DSCP priority of packets so that the device processes packets matching the same traffic classifier in the same manner.

Prerequisites

A traffic classifier has been created using the traffic classifier command in the system view.

Precautions

For a Layer 2 network, run the if-match 8021p command; for a Layer 3 network, run the if-match dscp command.

if-match dscp can match both IPv4 and IPv6 packets.

If you enter multiple DSCP priorities in the command, a packet matches a rule as longs as it matches one of the DSCP priorities, regardless of whether the relationship between traffic classification rules is AND or OR.

If the relationship between rules in a traffic classifier is AND, the if-match dscp and if-match ip-precedence commands cannot be used in the traffic classifier simultaneously.

In a version earlier than V200R009C00, if if-match dscp dscp-value is configured in the traffic classifier on the switch, the traffic classifier can only match IPv4 packets. After the switch is upgraded to V200R009C00 and later versions, the traffic classifier can match IPv4 and IPv6 packets.

If you run the if-match dscp command in the same traffic classifier view multiple times, only the latest configuration takes effect.

Example

# Configure a matching rule based on the DSCP priority of 1 in the traffic classifier class1.

<HUAWEI> system-view
[HUAWEI] traffic classifier class1
[HUAWEI-classifier-class1] if-match dscp 1