TP-Link 10GE T1700G-28TQUN V1 CLI Reference Guide - Page 180

Parameter tag/cos-id -- The 8 priority levels defined by IEEE 802.1P or the priority level the packets with tag are mapped to, which ranges from CoS 0 to CoS 7. tc-id -- The egress queue the packets with tag are mapped to. It ranges from 0 to 7, which represents TC0 toTC7 respectively. Command Mode Global Configuration Mode Privilege Requirement Only Admin, Operator and Power User level users have access to these commands. User Guidelines 1. By default, the mapping relation between tag/cos and the egress queue is: 0/CoS 0-TC1, 1/CoS 1-TC0, 2/CoS 2-TC2, 3/CoS 3-TC3, 4/CoS 4-TC4, 5/CoS 5-TC5, 6/CoS 6-TC6, 7/CoS 7-TC7. 2. Among the priority levels TC0-TC7, the bigger value, the higher p r i o r i t y. Example Map CoS 5 to TC 2: T1700G-28TQ(config)# qos queue cos-map 5 2 21.4 qos queue dscp-map Description The qos queue dscp-map command is used to configure the mapping relation between DSCP Priority and the CoS value. To return to the default configuration, please use no qos queue dscp-map command. DSCP (DiffServ Code Point) is a new definition to IP ToS field given by IEEE. This field is used to divide IP datagram into 64 priorities. When DSCP Priority is enabled, IP datagram are mapped to different priority levels based on DSCP priority mode; non-IP datagram with IEEE 802.1Q tag are mapped to different priority levels based on IEEE 802.1P priority mode if IEEE 802.1P Priority is enabled; the untagged non-IP datagram are mapped based on port priority mode. Syntax qos queue dscp-map { dscp-list } { cos-id } no qos queue dscp-map 164