P Priority - TP-Link JetStream T1600G-28TS User Manual

The following entries are displayed on this screen
Schedule Mode Config

Schedule Mode:
Queue Weight:

10.1.3 802.1P 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.
:
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. The weight values of TC0-TC7 can be customized
and their default values are 1:2:4:8:16:32:64:127 respectively.
SP+WRR-Mode: Strict-Priority + Weight Round Robin Mode. In

this mode, the switch provides two scheduling groups, SP group
and WRR group. SP group is processed prior to WRR group.
Queues in SP group are scheduled strictly based on
Strict-Priority mode while the queues inside WRR group follow
the WRR mode. In SP+WRR mode, TC7 and the queue with its
weight value set as 0 are in the SP group; other queues, with
none-zero weight value, belong to the WRR group and the
weight value can be customized. The default weight values of
TC0-TC6 are 1:2:4:8:16:32:64 respectively, while the value of
TC7 is 0 and non-configurable.
Equ-Mode: Equal-Mode. In this mode, all the queues occupy the

bandwidth equally. The weight value ratio of all the queues is
1:1:1:1:1:1:1:1.
Input the queue weight of the 8 TC queues. Configuration is not
available when Equ-Mode or SP-Mode is selected as the schedule
mode.
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