PLANET FGSW-2840 - Manual (Page 167)

User’s Manual of FGSW-2840 / FGSW-4840S
To complete QoS function configuration, you have to go to the Schedule Mode page to select a
schedule mode after the configuration is finished on this page.
4.7.1.4 Schedule Mode
This page provides select a schedule mode for the Managed Switch, when the network is congested, the issue that many packets
compete for resources must be solved, usually in the way of queue scheduling. The Managed Switch will control the forwarding
sequence of the packets according to the priority queues and scheduling algorithms set. On this Managed Switch, the priority
levels are labeled as TC0, TC1… TC3 and the screen in Figure 4-7-11 appears.
Figure 4-7-11: Schedule Mode Config Page Screenshot
The page includes the following fields:
Object Description
Schedule Mode Config
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.
 SP- 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 value ratio of TC0,
TC1, TC2 and TC3 is 1:2:4:8.
 WRR-Mode
Strict-Priority + Weight Round Robin Mode. In this mode, this Managed 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, TC3 is in the
SP group; TC0, TC1 and TC2 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 Managed
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.
 SP+WRR Mode
 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.
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