Avaya Configuring ATM Services Manual de usuario Pagina 315

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Site Manager Parameters
117374-B Rev. 00
A-21
Parameter: Xmit Sustainable Cell Rate (cells/s)
Path: Configuration Manager > Protocols > ATM > Service Records
>
PVC
Default: 2358
Options: 0, 128 to 353207 (ATM ARE OC-3 SONET/SDH ILI pairs and
Model 5782 ATM routers)
0, 128 to 96000 (ATM ARE DS-3 ILI pairs)
0, 128 to 80000 (ATM ARE E-3 ILI pairs; G832 framing mode)
0, 128 to 72000 (ATM ARE E-3 ILI pairs; G751 framing mode)
Function: Specifies the upper limit of the ATM connection conforming average rate. The
average rate equals the total number of cells transmitted, divided by the duration
of the connection.
Using the sustainable cell rate (SCR), you can define the future cell flow of a
VC in greater detail than by just using the peak cell rate.
For ATM ARE ILI pairs and Model 5782 ATM routers, the SCR maps directly
to the minimum cell rate (MCR). The MCR defines the minimum amount of
guaranteed bandwidth allowed for PVCs and Control VCs on the ATM line.
When setting the SCR, keep the following in mind:
The SCR maps directly to the MCR.
The MCR provides guaranteed bandwidth for PVCs and Control VCs while
allowing sufficient bandwidth for SVCs to operate.
To be useful, the SCR must not exceed the PCR.
If you know the average rate, set the SCR approximately 10 percent higher
than this value.
VCs may fail to operate with SCR values lower than 128 cells/s.
Entering 0 for the SCR turns off this function.
The E-3 framing mode setting affects the maximum SCR.
Instructions: After you determine the transmission rate of your ATM device, set the
sustainable cell rate within the specified range. Enter 0 to turn off this function.
MIB Object ID: 1.3.6.1.4.1.18.3.4.23.1.5.1.9
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