D-Link 3312SR Reference Manual - Page 103

DGS-3312SR Layer 3 Gigabit Switch config scheduling_mechanism Purpose Used to configure the scheduling mechanism for the QoS function Syntax config scheduling mechanism [strict | round_robin] Description The config scheduling_mechanism command allows the user to select between a round_robin and a strict mechanism for emptying the priority queues of the QoS function. The switch contains 9 hardware priority queues, one of which is internal and unoperational. Incoming packets must be mapped to one of these eight hardware priority queues. This command is used to specify the rotation by which these eight hardware priority queues are emptied. The switch's default is to empty the eight priority queues in order − from the highest priority queue (queue 7) to the lowest priority queue (queue 0). Each 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 has finished transmitting all of its packets, the highest hardware priority queue can again transmit any packets it may have received. Parameters strict - Entering the strict parameter indicates that the highest queue is the first to be processed. That is, the highest queue should finish emptying before the others begin. round_robin- Entering the round_robin parameter indicates that the priority queues will empty packets in a round-robin order. That is to say that they will be emptied in an even distribution. Restrictions Only administrator-level users can issue this command. Example usage: To configure the traffic scheduling mechanism for each COS queue: DGS-3312SR:4#config scheduling_mechanism strict Command: config scheduling_mechanism strict Success. DGS-3312SR:4# show scheduling_mechanism Purpose Used to display the current traffic scheduling mechanisms in use on the switch. Syntax show scheduling_mechanism Description This command will display the current traffic scheduling mechanisms in use on the switch. Parameters None. Restrictions None. 97