Traffic Shaping And Marking - Avaya G250 Administration

Configuring WAN interfaces
When using Priority DLCI, the primary DLCI is used to determine the state of the sub frame
relay interface. When the primary DLCI is up, the sub frame relay interface is up. When the
primary DLCI is down, the sub frame relay interface is down. When using Priority DLCI, it is
therefore recommended to verify that the primary DLCI is set as the High Priority DLCI in the
Priority DLCI group.
On the Avaya G250/G350 Media Gateway, OSPF is mapped by default to the High Priority
DLCI. For better network reliability, it is recommended to verify that the same configuration
exists on the other side of the frame relay connection.
If one of the Priority DLCIs is down, its traffic is dropped.
Map the PVC control protocol on the routers at all ends of a multi-VC point-to-point link. Map
this VC to the highest priority DLCI.

Traffic Shaping and Marking

Traffic shaping monitors outgoing traffic and takes appropriate action if traffic exceeds agreed
parameters. The action could be to drop the packets or mark them as being high-drop priority.
The Avaya G250/G350 Media Gateway supports the following traffic shaping parameters per
PVC:
Committed Information Rate (CIR) — the amount of committed bandwidth to which the
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customer is entitled
Discard Eligible (DE) pre-mark — sets the threshold for pre-marking DE of non-high
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priority traffic, in percentage of CIR.
Link Fragmentation and Interleaving (LFI) — enables fragmentation of large frame relay
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frames per PVC
You can configure the traffic shaping parameters within map classes. A map class is comprised
of the following parameters:
CIR — Default 56,000 bps
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Committed Burst (BC) size — default 7,000 bps
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Excess Burst (BE) size — default 0 bps
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DE pre-mark — Specifies the amount of non-high priority (0 to 5) packets over the BC
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and under 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 — Fragment size, in bytes. The default is No Fragmentation.
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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.
186 Administration for the Avaya G250 and Avaya G350 Media Gateways