TP-Link T2600G-18TSTL-SG3216 T2600G-18TSUN V1 Configuration Guide - Page 617

Configuring QoS DiffServ Configuration 2.1.2 Configuring Schedule Mode Configure the schedule mode to control the forwarding sequence of different TC queues when congestion occurs. Choose the menu QoS > DiffServ > Schedule Mode to load the following page. Figure 2-4 Schedule Mode Follow these steps to configure the schedule mode: 1) Select a schedule mode. SP-Mode Strict-Priority Mode. In this 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-Mode Weight Round Robin Mode. In this 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 TC7 is 1:2:4:...:127. SP+WRR-Mode Strict-Priority + Weight Round Robin Mode. In this mode, the 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 TC7 is in SP group and TC0, TC1...TC6 are in WRR group. Equ-Mode 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. Equ-Mode is selected by default. 2) (Optional) Configure the weight value of the each TC queue if the schedule mode is WRR of SP+WRR. Configuration Guide 587