Cabletron Systems 04-0053-01 manual Virtual Ports and Static Connections, PVC Connections

5VIRTUAL PORTS AND STATIC CONNECTIONS

5.1PVC CONNECTIONS

ATM SmartSwitches support Permanent Virtual Circuits (PVCs), both point-to-point and point-to-multipoint. Use PVCs to connect devices (that do not support SVCs) to a switch’s local client. Also, use PVCs to make connections through an ATM SmartSwitch between devices that support only PVCs.

Use point-to-point PVCs to connect one end node to another for two-way communication. Use point-to-multipoint PVCs to connect a broadcast end node to a group of receiving end nodes; traffic is one way.

Note The examples in this chapter are carried out on a SmartSwitch 6500. Most of these examples will work with all other SmartSwitch ATM switches, however, the port numbering would be different. For example, instead of port 7A1 (SmartSwitch 6500) the port might be A1 (on a 2500, 6A000, or 9A100).

Note PVCs use traffic descriptors to define their traffic characteristics. See Chapter 6, "Traffic Management," Section 6.1.1 for further information on traffic descriptors.

5.1.1Point-to-Point PVCs

The procedure for setting up a PVC connection between two end nodes through an ATM SmartSwitch consists of specifying the ports and the Virtual Path Connection Identifier and Virtual Channel Identifiers (VPCI and VCI).

1.Use add trafficdescriptor to define a traffic descriptor to use with the PVC:

SmartSwitch # add trafficdescriptor

Executing this command : add TrafficDescriptor

TrafficType(UBR)	: cbr
TrafficDescriptorType(2)	:
PCRCLP01(100)	:
QOSCLASS(1)	:
AalType(5)	:
SmartSwitch #

SmartSwitch ATM User Guide 5-1