FAQs

Q1:What is the difference in the implementation of RFC 2684 between SVCs and PVCs?
A1: The difference is in how addressing is referenced. With PVCs, the VPI/VCI numbers (using VCDs) are referenced. With SVCs, the globally significant NSAP addresses are referenced.
Q2:Are there any VPI/VCI space management guidelines?
A2: Yes. Some of the guidelines are as follows:

  • VCIs from 0 to 31 (inclusive) are reserved by the ITU-T and the ATM Forum, and should not be used in a live network.

  • On logical ports, the VPI for all VCs should equal the VPI of the tunneling VP. On the CPU port, the VPI should be 0.

  • The recommendation for PVCs is to use the VCI numbers in a higher range.

Q3:What is Q.2931, and how is it used?
A3: Q.2931 is the ATM signaling protocol. ...

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