The remark dscp command configures an action of re-marking the DSCP priority in IP packets in a traffic behavior.
The undo remark dscp command deletes the configuration.
By default, an action of re-marking the DSCP priority in IP packets is not configured in a traffic behavior.
Parameter |
Description |
Value |
|---|---|---|
dscp-name |
Specifies the DSCP priority name in IP packets. |
The value can be ef, af11, af12, af13, af21, af22, af23, af31, af32, af33, af41, af42, af43, cs1, cs2, cs3, cs4, cs5, cs6, cs7, or default. |
dscp-value |
Specifies the DSCP priority in IP packets. |
The value is an integer that ranges from 0 to 63. A larger value indicates a higher priority. |
Usage Scenario
To provide differentiated services based on the DSCP priority, run the remark dscp command to configure the device to re-mark the DSCP priority in IP packets in a traffic behavior.
Follow-up Procedure
Run the traffic policy command to create a traffic policy and run the classifier behavior command in the traffic policy view to bind the traffic classifier to the traffic behavior containing DSCP priority re-marking.
Precautions
If a traffic policy containing remark dscp is applied to the outbound direction on an interface, the device still processes outgoing packets based on the original priority but the downstream Layer 3 device or above processes the packets based on the re-marked priority.
If the traffic policy containing remark dscp and the trust dscp command are used in the outbound direction on the interface of packets, the remark dscp command changes DSCP priorities in packets because the remark dscp command takes precedence over the trust dscp command.
The remark dscp and remark ip-precedence commands cannot be used in the same traffic behavior.
If you run the remark dscp command in the same traffic behavior view multiple times, only the latest configuration takes effect.
After the remark dscp { dscp-name | dscp-value } command is configured in the traffic behavior view, the system maps the packet priority to a local priority based on the DSCP priority and sends the packet to a queue based on the mapped priority. If the remark local-precedence { local-precedence-name | local-precedence-value } command is also configured, the system sends packets to queues based on the priority configured using this command.
Applying a traffic policy containing remark dscp does not change the local priority of packets on the device where remark dscp is configured. To change the local priority of packets on the device, configure remark local-precedence in the traffic policy.