Configuring FR interface queuing
Universal queuing mechanisms (including FIFO, PQ, CQ, WFQ, CBQ, and RTPQ) are available on FR interfaces.
PVC PQ is specific to FR interfaces and is available only on FR interfaces. With FRTS or FR congestion management enabled, an FR interface supports only FIFO or PVC PQ.
PVC PQ contains four queues, including top queue, middle queue, normal queue, and bottom queue, in descending priority order. Packets in the four queues are sent in the descending priority order. The packets in the top queue are sent first, then the packets in the middle queue followed by the packets in the normal queue, and finally the packets in the bottom queue. Each PVC on an interface corresponds to a PVC PQ priority queue, and all the packets from the PVC are assigned to the PVC PQ priority queue.
To configure PVC PQ:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter FR interface view. | interface interface-type interface-number | N/A |
3. Configure PVC PQ for the FR interface and set the length of each PVC PQ priority queue. | fr pvc-pq [ top-limit middle-limit normal-limit bottom-limit ] | N/A |
4. Return to system view. | quit | N/A |
5. Enter FR class view. | fr class class-name | N/A |
6. Specify the PVC PQ priority queue for the FR PVC. | pvc-pq { bottom | middle | normal | top } | Optional. By default, packets from an FR PVC are assigned to the normal queue. |