D-Link DES-3326S Reference Manual - Page 156

DES-3326SR Layer 3 Fast Ethernet Switch CLI Reference Manual config scheduling Purpose Used to configure traffic scheduling for each of the switch's COS queues. Syntax config scheduling {max_packet /max_latency } Description The switch contains four hardware priority queues per port. The config scheduling command is used to specify the round robin rotation by which these four hardware priority queues are emptied. The switch's default is to empty the four hardware queues in order, from the highest priority (queue 0) to the lowest priority (queue 3). Each priority queue will transmit all of the packets in its buffer before allowing the next lower priority queue to transmit its packets. When the lowest priority queue (queue 3) had finished transmitting all of the packets in its buffer, the highest priority queue can again transmit any packets in its buffer. The max_packets parameter allows you to specify the maximum number of packets a given priority queue can transmit before allowing the next lowest priority queue to begin transmitting its packets. A value between 0 and 255 packets can be specified. For example, if a value of 3 is specified, then the highest priority queue (queue 0) will be allowed to transmit 3 packets − then the next lower priority queue (queue 1) will be allowed to transmit 3 packets, and so on, until all of the queues have transmitted 3 packets. The process will then repeat. The max_latency parameter allows you to 156 QOS Commands