Avaya Configuring Frame Relay Services Manual de usuario Pagina 52

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Configuring Frame Relay Services
2-26 117376-B Rev. 00
The default number of buffers is 200 per interface.
The software divides the number of buffers on the interface by the number of
traffic-shaped VCs, giving each VC the same number of buffers. Therefore, if
you have 10 traffic-shaped VCs per interface, each VC has 20 buffers.
If you enable protocol prioritization, the default number of buffers is 30 for
high priority traffic, 200 for normal, and 30 for low.
You can use the Technician Interface to increase the total number of buffers for the
interface, and you can also redistribute buffers among the VCs and among priority
queues.
The attributes that you customize at the interface level are:
wfFrDlcmiShapingHiQueueLimit
wfFrDlcmiShapingNormalQueueLimit
wfFrDlcmiShapingLoQueueLimit
The attributes you can customize at the VC level are:
wfFrCircuitShapedHiQueueLimit.
wfFrCircuitShapedNormalQueueLimit
wfFrCircuitShapedLoQueueLimit
For information on using the Technician Interface, see Using Technician Interface
Software.
FECN and BECN Notification Bits
The topic, “Congestion Control” (page 2-16), explains that a specified number of
FECN and BECN bits received during a set time period indicate congestion.
When congestion occurs on a traffic shaped VC, the router either drops traffic,
throttles it, or throttles and then drops traffic, depending on the value of the
Congestion Method parameter.
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