The service-class command marks the CoS value and color for the packets matched the traffic policy which configured this rule in its traffic behavior.
The undo service-class command restores the CoS value and color of packets to the default setting.
By default, the upstream board (in the inbound direction of an interface) of the device re-sets the CoS and color based on the packet priority and the inbound mapping table.
| Parameter | Description | Value |
|---|---|---|
| service-class |
Specifies the CoS value. The value is of the enumeration type. |
The value is an enumerated type and can be case-insensitive EF, AF1, AF2, AF3, AF4, BE, CS6, or CS7. |
| color color |
Specifies the color used to mark the packets. |
The value is an enumerated type and can be green, yellow, or red. |
| no-remark |
Enables the no-remark flag. |
- |
Usage Scenario
In the complex traffic classification, you can run this command to mark the CoS value and color for the packets matched the traffic policy which configured this rule in its traffic behavior, such as the video packet flow. The traffic policy containing this command marks the CoS and color for matching packets.
If this function is configured on inbound direction, the PHB is enabled on the outbound interface of a packet, and the outbound interface modifies the DSCP, 802.1p, or EXP value of the packet. The parameter no-remark can be specified when the packet priority fields do not need to be modified. If this function is configured in the downstream direction, the priority field of the packet is not changed even if the PHB function is enabled on the outbound interface of the packet. That is, the priority of the packet is not changed even if no-remark is not configured in the downstream direction.Prerequisites
The traffic classifier and traffic behavior are created in the system view.
Configuration Impact
The traffic will be marked to a specified Cos value and color, which matches the traffic policy which configured this rule in its traffic behavior.
Follow-up Procedure
You need to configure the traffic policy, bind the traffic behavior to the traffic classifier in the traffic policy, and apply the traffic policy to interfaces.
Precautions
If the command is configured in a board without eTM, the command takes effected only on the inbound direction. If the command is configured in a board with eTM, the command takes effected both the inbound and the outbound direction. But the outbound configuration does not affect whether the PHB is enabled. The no-mark parameter takes effected only on the inbound direction.
It is used to specify the CoS and discarding priority of packets so that the matched packets can enter the queues of the corresponding CoS values. In this manner, the device does not need to determine the CoS of packets by searching the behavior aggregate (BA) table according to the precedence field in a packet header. In addition, this enables the device to transparently transmit packets without changing the precedence fields of packets.