Example

You want to assign a priority of 5 to a VoIP flow that is destined to an IP 600 phone switch. You then want the switch to use the CBWFQ queue-servicing algorithm to forward frames from queue 5. The IP 600 phone switch is connected to an Avaya P882 Multiservice switch on port 5.5.

1. You set up an ACL rule that associates a priority of 5 with the destination IP address of the VoIP flow. (VoIP traffic cannot tolerate latency or frame loss, so it needs a high priority to ensure its timely delivery.)

Note: Priority 5 serves as an example only. Actual implementations may vary.

2. You enable CBWFQ for queue 5 on port 5.5.
3. The switch assigns a priority of 5 to the ingress VoIP packets and forwards them through ingress queue 5 to the egress port.
4. The switch stores the VoIP packets in egress queue 5 on port 5.5. (The switch places packets in the queue that matches their priority.)
5. The switch uses the CBWFQ algorithm to remove the packets from queue 5 and forward them to the IP 600 phone switch.