Congestion Management

Context

When congestion occurs on a network, the switch configured with congestion management determines the sequence at which packets are forwarded based on the defined scheduling policy and ensures that high-priority packets are scheduled preferentially.

Procedure

Choose Configuration > Security Services > QoS Configuration and click the Congestion Management tab, as shown in Figure 1.
Figure 1 Congestion Management
Select a port to be configured. Perform the following operations as required in the port area:
- Click a port icon. To deselect the port, click the port icon again.
- Drag the cursor to select consecutive ports in a batch.
- Click multiple port icons to select these ports, and click a port icon again to deselect the port.
- Select a slot where a panel is located. All ports on the panel are selected.
Configure a queue scheduling mode on an interface in Scheduling method.

The S6720-EI, S6720S-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5731-S, S5731S-S, S5732-H, S6730-H, S6730S-H, S6730-S, S6730S-S, S6720-HI, and S5720-EI do not support creation of scheduling templates.
1. Select Create Template from the drop-down list box, as shown in Figure 2.
  Figure 2 Create Template
2. Enter the name of the scheduling template in Create a Scheduling Template.
3. Select a scheduling mode of an interface queue.
  - pps: indicates WRR scheduling.
  - bps: indicates WDRR scheduling.
4. Set the weight of each queue.
  
  If the weight of a queue is set to 0, the queue uses PQ scheduling. In this case, PQ+WRR or PQ+WDRR is used.
Click Apply.