Cabletron Systems 04-0053-01 manual Point-to-Multipoint PVCs, Specify first port, Specify its Vpci

PVC Connections Virtual Ports and Static Connections

For this example, we specify CBR as the traffic type, then take the remaining defaults. Enter the show trafficdescriptor command to obtain the index number of the new traffic descriptor. In this example, the index number is two (2).

SmartSwitch # show trafficdescriptor

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TD# Traff	Desc	QoS	Peak Cell Rate	Sust Cell	Rate	Max Burst Size	Min Cell Aal Type
Type	Type		(Kb/s)	(Kb/s)		(Kb/s)	Rate
			CLP_0 CLP_0+1	CLP_0 CLP_0+1		CLP_0 CLP_0+1	(Kb/s)

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1	NRTVBR	7	0	0	10872	5436	0	2052	0	0	5
2	CBR	2	1	0	100	0	0	0	0	0	5
176	NRTVBR	2	1	0	1585	0	0	0	0	0	5

SmartSwitch #

2.Use add pvc to create the PVC; specify the ports through which the connection is established, the VPI/VCI pair to use with each port, and the traffic descriptor to use.

SmartSwitch # add pvc
ConnType(PTP)	:
Port-1-Number()	: 7a1	— Specify first port
Port-1-VPCI()	: 0	— Specify its VPCI
Port-1-VCI()	: 100	— Specify its VCI
Port-2-Number()	: 7b2	— Specify second port
Port-2-VPCI()	: 0	— Specify its VPCI
Port-2-VCI()	: 100	— Specify its VCI
Port1-to-Port2TrafficDescriptorIndex()	: 2	— We use our traffic descriptor
Port2-to-Port1TrafficDescriptorIndex()	: 2

SmartSwitch #

The example above creates a PVC between ports 7a1 and 7b2 with VPCI/VCI = 0/100.

3.Plug the end nodes into the specified ATM SmartSwitch ports (7a1 and 7b2).

4.Configure each end node with the proper IP address, subnet mask, and VPCI/VCI pair = 0/100.

The end nodes can communicate with each other through the point-to-point PVC connection.

Note To create a PVC with a VPI greater than zero (0), you must change the default

assignment of bits used to specify VPIs and VCIs. The number of VPI bits determine the available range of VPI numbers: Largest VPI number = 2VPIbits-1.

For example, if the number of VPI bits is three, the highest VPI that can be specified is 23-1 = (8 - 1) = 7. To change the available VPI numbers, use the set portconfig command (on a per-port basis) to alter the MaxVpiBits parameter from its default of zero (0). Keep in mind that if VPI bits are increased VCI bits are accordingly decreased. Fewer VCI bits results in fewer available VCIs per VPI.

5.1.2Point-to-Multipoint PVCs

Instructions in this section describe how to set up a point-to-multipoint connection through your ATM SmartSwitch.

5-2 SmartSwitch ATM User Guide