Avaya Configuring ATM Services Manual do Utilizador Página 137

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114056 Rev. A 11-1
Chapter 11
Customizing Signaling and ILMI Control VCs
The signaling VC and the ILMI VC are reserved. These VCs remain in an
operational state as long as signaling is enabled on the ATM interface. Because
most ATM devices use these VPI/VCI pairs for signaling, we recommend that you
not change these values. However, you may want to redefine the signaling and
ILMI control VCs for your specific network.
Redefining the Signaling Control VC
The signaling VC is a dedicated VPI/VCI pair reserved for signaling messages.
Having a permanent virtual circuit defined for signaling allows the ATM router to
obtain necessary information about its signaling environment and properly
negotiate the values it must use with other devices on the ATM network.
Changing the Signaling VPI Number
By default, the virtual path identifier (VPI) for the signaling control VC is 0.
However, you can change the VPI number from 0 through 255.
Changing the Signaling VCI Number
By default, the virtual channel identifier (VCI) for the signaling control VC is 5.
However, you can change the VCI number from 1 through 65535.
Site Manager: VPI: page A-43
Site Manager: VCI: page A-44
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