Cabletron Systems 04-0053-01 manual Default MaxVpiBits =, Default MaxVciBits =

Virtual Ports and Static Connections VirtualPorts

Note For PNNI, the number of VPIs used by each virtual port should be one (1). For virtual UNI, the number of VPIs used by each virtual port should correspond to the number of VPIs on the user side of the UNI connection (For information on virtual UNI, refer to the ATM Forum specification for ILMI 4.0.).

The following is a practical, step-by-step example of creating a virtual port on physical port 7A1 that controls a single VPI.

1.Use the set portconfig command to turn signaling off on physical port 7a1:

SmartSwitch # set portconfig
PortNumber()	: 7a1
PortAdminStatus(up)	:
IlmiAdminStatus(up)	:
SigType(autoConfig)	: nnipvc — Turn off signaling by setting SigType to nnipvc
SigRole(network)	:
InterfaceType(private)	:
MaxVpiBits(0)	:	— Default MaxVpiBits = 0
MaxVciBits(13)	:	— Default MaxVciBits = 13
MaxSvcVpci(0)	:
MinSvcVci(32)	:
MaxVccs(8192)	:
MaxSvpVpci(0)	:
MaxVpcs(0)	:

SmartSwitch #

2.Use the set portconfig command to assign two bits to MaxVpiBits.:

SmartSwitch # set portconfig
PortNumber()	: 7a1
PortAdminStatus(up)	:
IlmiAdminStatus(up)	:
SigType(nniPvc)	:
SigRole(network)	:
InterfaceType(private)	:	— Set to 1 — this translates to VPIs = 2 1-1 = 1
MaxVpiBits(0)	: 1
MaxVciBits(12)	:	— Notice that MaxVciBits has reduced itself by 1 bit
MaxSvcVpci(7)	:
MinSvcVci(32)	:
MaxVccs(8192)	:
MaxSvpVpci(7)	:
MaxVpcs(7)	:
SmartSwitch #

Note The command set portconfig is used here twice for the purposes of clarity only. Normally, you would turn off signaling and set the MaxVpiBits within the same

instance of set portconfig.

SmartSwitch ATM User Guide 5-9