TP-Link T1500-28TC TL-SL2428 T1500-28TCUN V1 Configuration Guide - Page 315

Configuring QoS DiffServ Configuration Note: All the ports in the same LAG should be assigned with the same port priority. The following example shows how to map port 1-3 to TC1, and keep other mapping relations as default: Switch#configure Switch(config)#interface range fastEthernet 1/0/1-3 Switch(config-if-range)#qos 0 Switch(config-if-range)#show qos interface fastEthernet 1/0/1-3 Port TC Value LAG Fa1/0/1 TC 0 N/A Fa1/0/2 TC 0 N/A Fa1/0/3 TC 0 N/A Switch(config-if-range)#end Switch#copy running-config startup-config 2.2.2 Configuring Schedule Mode Follow these steps to configure the schedule mode to control the forwarding sequence of different TC queues when congestion occurs. Step 1 configure Enter global configuration mode. Step 2 qos queue mode {sp | wrr | sp+wrr | equ} Configure the schedule mode of TC queues. sp: The Strick Priority mode. In SP mode, the queue with higher priority will occupy the whole bandwidth. Packets in the queue with lower priority are sent only when the queue with higher priority is empty. wrr: In WRR mode, packets in all the queues are sent in order based on the weight value for each queue. By default, the weight value ratio of TC0 to TC3 is 1:2:4:8. sp+wrr: In SP+WRR mode, this switch provides two scheduling groups, SP group and WRR group. When scheduling queues, the switch allows the queues in the SP group to occupy the whole bandwidth following the SP mode. When the SP group is empty, the queues in the WRR group will take up the bandwidth according to their weight value ratio. By default, queue TC3 is in SP and TC0, TC1, TC2 are in WRR group. equ: In Equ mode, all the queues occupy the bandwidth equally. The weight value ratio of all the queues is 1:1:1:1. It is the default schedule mode. Configuration Guide 294