TP-Link T3700G-28TQ T3700G-28TQ V1 UG - Page 261

P Priority, SP+WRR-Mode, Equ-Mode, 1P Priority

Page 261 highlights

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

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SP+WRR-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.
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.
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