Which of the following statements are true regarding round robin queuing? (Select 2 choices.)
A. Shared round-robin settings override shaped round robin settingsunless the weight of the shared queue is 0.
B. Shared round-robin queuing guarantees bandwidth to queues but does not rate limit a queue if other queues are empty.
C. Shared round-robin queuing is available only on egress queues.
D. Shaped round-robin queuing is available only on egress queues.
E. Shaped round-robin queuing does not service any other queues until the first queue is empty.
Explanation:
Shaped round-robin queuing is available only on egress queues; shared round-robin queuing is available on ingress and egress queues. Shared round robin is a Quality of Service (QoS) queuing method that guarantees a percentage of bandwidth to each queue but does not rate-limit a queue if other queues are empty. Shaped round robin, on the other hand, guarantees a percentage of bandwidth to each queue and rate-limits each queue to that percentage, even if other queues are empty. Queues are handled based on their configured weight values.
Round-robin queuing methods do not wait until the first queue is empty before servicing other queues.
Shared round-robin and shaped round-robin service queues are based on each queue’s configured weight. By contrast, strict-priority queues are given priority over every other queue and are always emptied first.
Shared round-robin settings do not override shaped round-robin settings. Rather, shaped round-robin settings override shared round-robin settings unless the weight of the shaped round-robin queue is 0. Strict-priority queuing overrides round-robin settings on the first queue, which is the priority queue.