TP-Link 10GE T1700G-28TQUN V1 CLI Reference Guide - Page 179

21.2 qos dscp Description The qos dscp command is used to enable the mapping relation between DSCP Priority and CoS value. To disable the mapping relation, please use no qos dscp command. Syntax qos dscp no qos dscp Command Mode Global Configuration Mode Privilege Requirement Only Admin, Operator and Power User level users have access to these commands. User Guidelines DSCP (DiffServ Code Point) is a new definition to IP ToS field given by IEEE. DSCP priorities are mapped to the corresponding 802.1p priorities. IP datagram will be classified into the egress queue based on the mapping relation between DSCP priority and CoS value. Example Enable the mapping relation between DSCP Priority and CoS value: T1700G-28TQ(config)# qos dscp 21.3 qos queue cos-map Description The qos queue cos-map command is used to configure the mapping relation between IEEE 802.1P priority tag/IEEE 802.1Q tag, CoS value and the TC egress queue. To return to the default configuration, please use no qos queue cos-map command. When 802.1P Priority is enabled, the packets with 802.1Q tag are mapped to different priority levels based on 802.1P priority mode. The untagged packets are mapped based on port priority mode. Syntax qos queue cos-map { tag/cos-id } { tc-id } no qos queue cos-map 163