Schedule Mode - TP-Link TL-SG2216 User Manual

Configuration Procedure:
Step Operation
1 Select the port priority
2 Configure
relation between the 802.1P
priority and TC
3 Select a schedule mode

9.1.2 Schedule Mode

On this page you can select a schedule mode for the switch. When the network is congested, the
problem that many packets compete for resources must be solved, usually in the way of queue
scheduling. The switch will control the forwarding sequence of the packets according to the priority
queues and scheduling algorithms you set. On this switch, the priority levels are labeled as TC0,
TC1... TC3.
Choose the menu QoS→DiffServ→Schedule Mode to load the following page.
The following entries are displayed on this screen:
Schedule Mode Config
SP-Mode:
WRR-Mode:
SP+WRR-Mode:
Equ-Mode:
Description
Required. On QoS→DiffServ→Port Priority page,
configure the port priority.
the mapping Required. On QoS→DiffServ→802.1P Priority page,
configure the mapping relation between the 802.1P
priority and TC.
Required. On QoS→DiffServ→Schedule Mode page,
select a schedule mode.
Figure 9-7 Schedule 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.
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.
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, 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 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.
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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