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Chapter 21 QoS Commands
QoS (Quality of Service) function is used to optimize the network performance. It provides you with
network service experience of a better quality.
qos
Description
The qos command is used to configure CoS (Class of Service) based on port.
To return to the default configuration, please use no qos command.
Syntax
qos cos-id
no qos
Parameter
cos-id —— The priority of port. It ranges from 0 to 7, which represent CoS0,
CoS1, CoS2, CoS3, CoS4, CoS5, CoS6, CoS7 respectively. By default, the
priority is 0.
Command Mode
Interface Configuration Mode（interface ethernet / interface range ethernet）
User Guidelines
Port priority is one property of the port. When the port priority is specified, the
data will be classified into the egress queue based on the CoS value of the
ingress port and the mapping relation between the CoS and TC in IEEE 802.1P.
Example
Configure the priority of port 5 as 3:
TP-LINK(config)# interface ethernet 5
TP-LINK(config-if)# qos 3
qos dot1p config
Description
The qos dot1p config command is used to configure the mapping relation
between IEEE 802.1P Priority and Egress Queue. To return to the default
configuration, please use no qos dot1p config command. IEEE 802.1P gives
the Pri field in IEEE 802.1Q tag a recommended definition. This field is used to