3Com 10014299 manual Configure Pipq

268 CHAPTER 17: CONFIGURING FRAME RELAY

Set the queue type of a Frame Relay PVC to CQ	cq cql list-number
Restore the queue type of a Frame Relay PVC to	undo cq cql
FIFO
Set the queue type of a Frame Relay PVC to	wfq [
WFQ	congestive-discard-threshold [
	dynamic-queues ] ]
Restore the queue type of a Frame Relay PVC to	undo wfq
FIFO

By default, the queue type of a Frame Relay PVC is FIFO.

When the congestion management is enabled on Frame Relay PVCs, the queue type on the interface can only be FIFO.

For the configuration of PQ, CQ and WFQ, refer to the part of QoS.

2Configure Frame Relay Interface Queueing

The user can configure four queueing types on a Frame Relay interface:.FIFO, PQ, CQ and WFQ. All of them are the queues owned by a general QoS. For their configurations, refer to the part of QoS.

Frame Relay interface also supports PVC interface priority queueing (PIPQ). This queueing type can only be applied on a Frame Relay interface. After Frame Relay traffic shaping or Frame Relay congestion management is enabled on a Frame Relay interface, the queueing type on the interface can only be either FIFO or PIPQ.

A PIPQ queue classifies the packets into four categories according to different Frame Relay PVCs.

A PIPQ queue has four sub-queues. They are respectively high-priority queue (top), medium-priority queue (middle), normal-priority queue (normal) and low-priority queue (bottom). The priorities are listed in descending order. The packets will be transmitted according to the priority sequence. Specifically, all the packets in the top queue will be first transmitted, then the packets in the middle queue followed by the packets in the normal queue, and finally those in the bottom queue. Each Frame Relay PVC on the interface has its own PIPQ priority. Therefore, the packets from this PVC can only enter the corresponding PIPQ queue.

Perform the following configurations respectively in interface view and frame relay class view.

Table 310 Configure PIPQ

Operation	Command
Set the queueing type of Frame Relay interface to	fr pvc-pq [ top-limit
PIPQ and set the length of each PIPQ queue at	middle-limit normal-limit
the same time (in interface view)	bottom-limit ]
Restore the queueing type of Frame Relay	undo fr pvc-pq
interface to FIFO (in interface view)
Set the priority of PIPQ on the Frame Relay PVC	pvc-pq { top middle normal
(in frame relay class view)	bottom }
Restore the priority of PIPQ on the Frame Relay	undo pvc-pq
PVC to normal (in frame relay class view)

By default, the queueing type of a Frame Relay interface is FIFO.