Avaya Configuring ATM Services Manual de usuario Pagina 100

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Configuring ATM Services
5-16
When setting the SCR for ATM FRE2 ILI pairs, keep the following in mind:
The SCR is essentially a future average. By setting the SCR you are
specifying the cell rate, over time, to which you want the VC to conform.
To be useful, the SCR must not exceed the PCR.
If you know the user average rate, set the SCR about 10% higher than this
value.
ATM FRE2 ILI pairs require a minimum SCR value of 300 cells/s. PVCs may
fail to operate with SCR values less than 300 cells/s.
When setting the SCR for ATM ARE ILI pairs, 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 user average rate, set the SCR about 10% higher than this
value.
ATM ARE ILI pairs require a minimum SCR value of 128 cells/s. VCs may
fail to operate with SCR values less than 128 cells/s.
ATM ARE ILI pairs allow you to enter an SCR value of 0. Entering 0 for the
SCR turns off this function.
The E-3 framing mode setting affects the maximum SCR setting. Refer to
Table 5-1 for additional information.
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