ZyXEL Communications MES3500-24F User Manual

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 Chapter 22 Queuing Method
MES3500-24/24F User’s Guide
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22.1.3  Weighted Round Robin Scheduling (WRR) 
Round Robin Scheduling services queues on a rotating basis and is activated only when a port has 
more traffic than it can handle. A queue is a given an amount of bandwidth irrespective of the 
incoming traffic on that port. This queue then moves to the back of the list. The next queue is given 
an equal amount of bandwidth, and then moves to the end of the list; and so on, depending on the 
number of queues being used. This works in a looping fashion until a queue is empty. 
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. 
22.2  Configuring Queuing 
Click Advanced Application > Queuing Method in the navigation panel.
Figure 88   
Advanced Application > Queuing Method