Avaya Configuring ATM and MPLS Services Uživatelský manuál Strana 426

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Configuring ATM and MPLS Services
A-60
117374-C Rev 00
Parameter: Xmit Sustainable Cell Rate (cells/s)
Path: Configuration Manager > Protocols > ATM > ATM Signaling > Sig VC
or
Configuration Manager > Circuits > Edit Circuits > Edit > ATM > Interim
Local Management Interface (ILMI) > ILMI VC
Default: 4716
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; G.832 framing mode)
0, 128 to 72000 (ATM ARE E-3 ILI pairs; G.751 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 using only the peak cell rate.
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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