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User Guide 644
Configuring QoS Class of Service Configuration
Scheduler Type Select the type of scheduling used for corresponding queue. When the network
congestion occurs, the egress queue will determine the forwarding sequence of
the packets according to the type.
Strict: In this mode, the egress queue will use SP (Strict Priority) to process the
traffic in different queues. When congestion occurs, the traffic will be transmitted
according to its queue priority strictly. The queue with higher priority occupies
the whole bandwidth. Packets in the queue with lower priority are sent only when
the queue with higher priority is empty.
Weighted: In this mode, the egress queue will use WRR (Weighted Round Robin)
to process the traffic in different queues. When congestion occurs, all the traffic
will be transmitted, but the bandwidth that each traffic queue occupies will be
allocated based on the queue weight.
Queue Weight Specify the queue weight for the desired queue. This value can be set only in the
Weighted mode. The valid values are from 1 to 127.
Minimum
Bandwidth
Specify the minimum guaranteed bandwidth for the desired queue. The valid
values are from 0 to 100 and 0 means Minimum Bandwidth is disabled. If the
queue bandwidth calculated according to the weight is smaller than the minimum
bandwidth, the switch will be forced to allocated the minimum bandwidth to the
queue, and the other queue will share the rest bandwidth based on the weight.
Note: Minimum Bandwidth is only available on certain devices.
Management
Type
Displays the Management Type for the queues. The switch supports Taildrop
mode. When the traffic exceeds the limit, the additional traffic will be dropped.
3) Click Apply.
For Certain Devices:
Choose the menu QoS > Class of Service > Scheduler Settings to load the following
page.
Figure 2-11 Specifying the Scheduler Settings
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