Priority Queuing; Wan Configuration Example - Avaya G350 Administration

You can configure the traffic shaping parameters within map classes. A map class is comprised of the
following parameters:
•
— Default 56,000 bps
CIR
•
Committed Burst (BC) size
•
Excess Burst (BE) size
•
DE pre-mark
the BE to label as DE. This amount is measured in percentage of CIR. The default is 100%,
unconditionally dropping all packets above the BE.
•
Fragmentation
You can configure up to 128 different map classes using different combinations of traffic shaping
parameters. You then apply these map classes to either the Primary VC or to the Priority DLCI group
VCs.
NOTE:
You must configure the Primary VC before associating a DLCI map class to the 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
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 G350 enables a distinction within the high-priority queue between priorities 6 and
7. The 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.
Administration of the Avaya G350 Media Gateway
June 2004
— default 7,000 bps
— default 0 bps
— Specifies the amount of non-high priority (0 to 5) packets over the BC and under
— Fragment size, in bytes. The default is No Fragmentation.
Configuring a WAN
WAN configuration example
frame-relay traffic-shaping
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