3com 3.01.01 Benutzerhandbuch

WRR algorithm  Each port supports four or eight outbound queues. In WRR 
mode, the system processes the queues by turn, so every queue can have a service 
period. 

See the case where the port supports four outbound queues. Every queue is 
assigned with a weight value (respectively numbered as w3, w2, w1 and w0), 
which indicates the weight in obtaining resources. For a 100 Mbps port, the 
weight values are set as 50, 30, 10 and 10 (corresponding respectively to w3, w2, 
w1 and w0). The even the queue with the lowest priority can be allocated with a 
10 Mbps bandwidth.  

Another merit for WRR algorithm: Though the queues are scheduled by turn, they 
are not configured with fixed time quantum. If a queue has no packets, the system 
immediately schedules the next queue. Then bandwidth resources can be fully 
utilized. 

Traffic mirroring duplicates specified packets to the monitoring port for network 
test and troubleshooting. 

Port mirroring duplicates all packets at a specified port to the monitoring port for 
network test and troubleshooting. 

The system can make traffic statistics based on flow for further analysis.

QoS configuration tasks include

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