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belong to the WRR group and the weight value ratio of TC0, TC1 and TC2 is 1:2:4. In this
way, when scheduling queues, the switch allows TC3 to occupy the whole bandwidth
following the SP mode and the TC0, TC1 and TC2 in the WRR group will take up the
bandwidth according to their ratio 1:2:4.
4. 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.
The QoS module is mainly for traffic control and priority configuration, including three
submenus: DiffServ, Bandwidth Control and Voice VLAN.
9.1 DiffServ
This switch classifies the ingress packets, maps the packets to different priority queues and
then forwards the packets according to specified scheduling algorithms to implement QoS
function.
This switch implements three priority modes based on port, on 802.1P and on DSCP, and
supports four queue scheduling algorithms. The port priorities are labeled as CoS0, CoS1…
CoS7.
The DiffServ function can be implemented on Port Priority, 802.1P/Cos mapping, DSCP
Priority and Schedule Mode pages.
9.1.1 Port Priority
On this page you can configure the port priority.
Choose the menu QoS→DiffServ→Port Priority to load the following page.
Figure 9-6 Port Priority Config for
115
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