ATM Configuration and Troubleshooting Guide

Conﬁguring SVCs and PVCs

Conﬁguring PVCs

Chapter 576

Conﬁguring PVCs

PVCs can be conﬁgured for only Classical IP interfaces.

NOTE When conﬁguring a PVC, you must conﬁgure it on the ATMsystem, ATM

switch, and destination ATM system.

We recommend you conﬁgure PVCs to start automatically at system

start-up time (see “Automatic Reconﬁguration of PVCs” on page 85).

During adapter operation, if the required resources are consumed by

SVCs, you will not be able to create a PVC. For example, if you want to

specify a PVC with a speciﬁc VPI and VCI, you must conﬁgure the PVC

before SVCs are operational.

Before Conﬁguring PVCs

Before you conﬁgure PVCs, you must follow these steps:

Step 1. Conﬁgure the ATM adapter for use in a Classical IP network as

described in Chapter 3, “Conﬁguring a Classical IP over ATM Interface

over an ATM Interface,” on page 23.

Step 2. Check to see which VPI and VCI numbers are available on the switch.

Step 3. Display the VCs for the card on your ATM system, and identify the VPI

and VCI numbers that are already being used.

Step 4. Be aware of the trafﬁc type and trafﬁc conﬁguration limitations

(described in “Summary of Trafﬁc Parameters” on page 63 and “Trafﬁc

Conﬁguration Limitations” on page 64). SAM indicates an error if you

encounter one of these limitations during conﬁguration.

For example, you can use the following command to check the VCs and

the VPI and VCI numbers used for ATM adapter atm0 (card instance

number 0):

atmmgr 0 show -v

The output could look like this (note, this example is for a conﬁguration

that includes LANE V2 and MPOA):