ES-2108 Series User’s Guide

Weighted Round Robin Scheduling (WRR) uses the same algorithm as round robin scheduling, but services queues based on their priority and queue weight (the number you configure in the queue Weight field) rather than a fixed amount of bandwidth. WRR is activated only when a port has more traffic than it can handle. Queues with larger weights get more service than queues with smaller weights. This queuing mechanism is highly efficient in that it divides any available bandwidth across the different traffic queues and returns to queues that have not yet emptied.

18.2 Configuring Queuing Method

Click Advanced Application, Queuing Method in the navigation panel.

Figure 53 Queuing Method

The following table describes the labels in this screen.

Table 35

Queuing Method

 

 

LABEL

DESCRIPTION

 

 

Method

Select Strictly Priority or Weighted Round Robin Scheduling.

 

Strict Priority Queuing (SPQ) services queues based on priority only. When the highest

 

priority queue empties, traffic on the next highest-priority queue begins. Q3 has the highest

 

priority and Q0 the lowest. The default queuing method is Strictly Priority.

 

Weighted Round Robin Scheduling (WRR) services queues on a rotating basis based on

 

their queue weight (the number you configure in the queue Weight field). Queues with

 

larger weights get more service than queues with smaller weights.

 

Note: When you select SPQ, it applies to Q3 only (with priority over all

 

other queues). Q0 ~ Q2 will use Weighted Round Robin.

Weight

When you select Weighted Round Robin Scheduling, use the drop-down list boxes to

 

choose queue weights (1-15). Bandwidth is divided across the different traffic queues

 

according to their weights.

Apply

Click Apply to save your changes back to the switch.

 

 

Cancel

Click Cancel to begin configuring this screen afresh.

110

Chapter 18 Queuing Method