Priority Queuing; Wan Configuration Example - Avaya G250 Administration

Note:
You must configure the Primary VC before associating a DLCI map class to the
Note:
Priority DLCI group VCs. Removing the Primary VC after associating a DLCI map
class to the Priority LCI group VCs, removes their map class configuration.
You can enable traffic shaping on a frame relay interface using the frame-relay
traffic-shaping command. After you enable traffic shaping, a default map class is applied
to all currently configured PVCs. In this default map class, the BE is zero. All traffic above the
BC is dropped.

Priority queuing

Priority queuing is designed to give all mission-critical programs higher priority than less critical
traffic. Traffic is queued as high, normal, medium, or low. Using priority queuing, all high-priority
traffic is serviced first, then normal, etc.
The frame relay ingress queuing mechanism functions the same as on PPP interfaces. The
frame relay egress queuing mechanism also functions the same as on PPP interfaces, serving
all PVCs configured on the interface, with an additional user-configurable DE buffer. The DE
buffer contains all traffic marked as Discard Eligible, and has the lowest priority.
When using VoIP, the G250/G350 enables a distinction within the high-priority queue between
priorities 6 and 7. The G250/G350 uses priority 6 for the voice-bearer traffic, and priority 7 for
the voice-controller traffic. These two priorities are served on a round-robin basis. Within the
high-priority queue, the priority 6 capacity is a maximum of 25% the size of the priority 7
capacity to reduce the delay of voice flow. The priority 6-7 distinction exists in data mode as
well, where the queue is divided equally between both capacities.

WAN configuration example

This section contains an example that illustrates a common PPP VoIP configuration between
two sites connected over a WAN.
WAN configuration example
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