Справочное Руководство для TP-LINK TL-SG2008

 

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Global Configuration Mode 

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. 

Enable the mapping relation between DSCP Priority and CoS value: 

TL-SG2008(config)# qos dscp 

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. 

qos queue cos-map { tag/cos-id } { tc-id } 

no qos queue cos-map 

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 0 to 7. 

tc-id —— The egress queue the packets with tag are mapped to. It ranges from 

0 to 3, which represents TC0, TC1, TC2 and TC3 respectively. 

Global Configuration Mode

 

1.  By default, the mapping relation between tag/cos and the egress queue is: 

0-TC1, 1-TC0, 2-TC0, 3-TC1, 4-TC2, 5-TC2, 6-TC3, 7-TC3 

2.  Among the priority levels TC0-TC3, the bigger value, the higher 

priority.