TP-Link T3700G-28TQ T3700G-28TQ V1 UG - Page 261
P Priority, SP+WRR-Mode, Equ-Mode, 1P Priority
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SP+WRR-Mode: Equ-Mode: Strict-Priority + Weight Round Robin Mode. In this mode, this switch provides two scheduling groups, SP group and WRR group. Queues in SP group and WRR group are scheduled strictly based on strict-priority mode while the queues inside WRR group follow the WRR mode. In SP+WRR mode, TC7 is in the SP group; TC0, TC1, TC2 to TC6 belong to the WRR group and the weight value ratio of TC0, TC1, TC2 to TC6 is 1:2:4:8:16:32:64. In this way, when scheduling queues, the switch allows TC7 to occupy the whole bandwidth following the SP mode and the TC0, TC1, TC2 to TC6 in the WRR group will take up the bandwidth according to their ratio 1:2:4:8:16:32:64. Equal-Mode. In this mode, all the queues occupy the bandwidth equally. The weight value ratio of all the queues is 1:1:1:1:1:1:1:1. 12.1.3 802.1P Priority On this page you can configure the mapping relation between the 802.1P priority tag-id/CoS-id and the TC-id. 802.1P gives the Pri field in 802.1Q tag a recommended definition. This field, ranging from 0-7, is used to divide packets into 8 priorities. 802.1P Priority is enabled by default, so the packets with 802.1Q tag are mapped to different priority levels based on 802.1P priority mode but the untagged packets are mapped based on port priority mode. With the same value, the 802.1P priority tag and the CoS will be mapped to the same TC. Choose the menu QoS→DiffServ→802.1P Priority to load the following page. Figure 12-8 802.1P Priority The following entries are displayed on this screen: 802.1P Priority Config 802.1P Priority: Select Enable/Disable 802.1P Priority. 250