
Configuring ATM Services
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Redefining the ILMI Control VC
The ILMI control VC is a dedicated VPI/VCI pair reserved for ILMI messages.
Having a permanent virtual circuit defined for ILMI allows the ATM router to
send and receive initial registration data to and from an ATM switch.
Changing the ILMI VPI Number
By default, the virtual path identifier (VPI) for the ILMI control VC is 0. However,
you can change the VPI number from 0 through 255.
Changing the ILMI VCI Number
By default, the virtual channel identifier (VCI) for the ILMI control VC is 16.
However, you can change the VCI number from 1 through 65535.
Modifying Control VC Traffic Parameters
You can modify the following traffic parameters for both the signaling and the
ILMI control VCs:
• Peak Cell Rate
• Sustainable Cell Rate
• Maximum Burst Size
Setting the PCR
The PCR specifies the upper traffic limit, in cells/second, that the ATM connection
can submit.
How you set the PCR depends on
• The optical transmission rate of your ATM device
• The amount of traffic you expect on a particular VC
Site Manager: ILMI VPI: page A-53
Site Manager: ILMI VCI: page A-54
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