Beta Draft Confidential
D-181/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
ATM FCP Rate Profile Tables
MCR Class Mappings
IMA Group Configuration
If you have an IMA group configuration for the CBX 500 3-Port Channelized DS3/1
IMA IOM or CBX 3500 3-Port Channelized DS3/1 IMA module, use these
instructions to determine the MCR class.
1. Calculate the MCR class using the following formula:
Table D-6 describes the arguments in the formula.
.
2. When you have calculated the MCR class, round the figure up to the nearest
integer value.
Table D-6. IMA Configuration MCR Formula Arguments
Argument Description
MCR Enter the MCR value for the VC.
LPortBW Enter the value of bandwidth configured for
the logical port.
Channels Enter the number of T1 channels configured
for the IMA group.
3
MCR()log
2
LPortBW()log
2
--------------------------
1.544 Channels()
375
------------------------------
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