4000 Router Series ACL and QoS Configuration Guide

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Configuring priority marking

Priority marking sets the priority fields or flag bits of packets to modify the priority of packets. For example,

you can use priority marking to set IP precedence or DSCP for a traffic class of IP packets to control the

forwarding of these packets.

To configure priority marking, you can associate a traffic class with a traffic behavior configured with the

priority marking action to set the priority fields or flag bits of the traffic class of packets.

Priority marking can be used together with priority mapping. For more information, see "Configuring

iority mapping."

Configuration procedure

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Create a traffic class and

enter traffic class view.

traffic classifier classifier-name [ operator { and

| or } ]

By default, no traffic class

is configured.

3. Configure match criteria.

if-match [ not ] match-criteria

By default, no match

criterion is configured.

For more information

about the if-match

command, see ACL and

QoS Command

Reference.

4. Return to system view.

quit N/A

5. Create a traffic behavior

and enter traffic behavior

view.

traffic behavior behavior-name

By default, no traffic

behavior is configured.

6. Configure a priority

marking action.

• Set the DSCP value for packets:

remark dscp dscp-value

• Set the 802.1p priority for packets:

remark dot1p dot1p-value

Set the drop priority for packets:

remark drop-precedence

drop-precedence-value

• Set the IP precedence for packets:

remark ip-precedence ip-precedence-value

• Set the local precedence for packets:

remark local-precedence

local-precedence-value

• Set the local QoS ID for packets:

remark qos-local-id local-id-value

Use one of the

commands.

By default, no priority

marking action is

configured.

The remark

drop-precedence

command applies to only

the incoming traffic.

7. Return to system view.

quit N/A

8. Create a QoS policy and

enter QoS policy view.

qos policy policy-name

By default, no QoS policy

is configured.