Specifications

270
LAG: Displays the LAG number which the port belongs to.
Note:
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.
Configuration Procedure:
Step Operation Description
1 Select the port priority Required. On QoS→DiffServ→Port Priority page,
configure the port priority.
2
Configure the mapping
relation between the CoS
priority and TC
Required. On QoS→DiffServ→802.1P Priority page,
configure the mapping relation between the CoS and
TC.
3 Select a schedule mode Required. On QoS→DiffServ→Schedule Mode
page, select a schedule mode.
12.1.2 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…TC7.
Choose the menu QoS→DiffServ→Schedule Mode to load the following page.
Figure 12-7 Schedule Mode
The following entries are displayed on this screen:

Schedule Mode Config
SP-Mode: Strict-
Priority Mode. In this mode, the queue with higher priority
will occu
py 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
q
ueue. The weight value ratio of TC0, TC1, TC2 to TC7 is
1:2:4:8:16:32:64:128.