Cisco WS-C3560E-48PD-SF Command Reference - Page 296

mls qos srr-queue input priority-queue Chapter 2 Catalyst 3560 Switch Cisco IOS Commands mls qos srr-queue input priority-queue Use the mls qos srr-queue input priority-queue global configuration command to configure the ingress priority queue and to guarantee bandwidth on the internal ring if the ring is congested. Use the no form of this command to return to the default setting. mls qos srr-queue input priority-queue queue-id bandwidth weight no mls qos srr-queue input priority-queue queue-id Syntax Description queue-id bandwidth weight Ingress queue ID. The range is 1 to 2. Bandwidth percentage of the internal ring. The range is 0 to 40. Defaults The priority queue is queue 2, and 10 percent of the bandwidth is allocated to it. Command Modes Global configuration Command History Release 12.1(19)EA1 Modification This command was introduced. Usage Guidelines You should use the priority queue only for traffic that needs to be expedited (for example, voice traffic, which needs minimum delay and jitter). The priority queue is guaranteed part of the bandwidth on the internal ring, which reduces the delay and jitter under heavy network traffic on an oversubscribed ring (when there is more traffic than the backplane can carry, and the queues are full and dropping frames). Shaped round robin (SRR) services the priority queue for its configured weight as specified by the bandwidth keyword in the mls qos srr-queue input priority-queue queue-id bandwidth weight global configuration command. Then SRR shares the remaining bandwidth with both ingress queues and services them as specified by the weights configured with the mls qos srr-queue input bandwidth weight1 weight2 global configuration command. To disable priority queueing, set the bandwidth weight to 0, for example, mls qos srr-queue input priority-queue queue-id bandwidth 0. 2-264 Catalyst 3560 Switch Command Reference 78-16405-05