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7-19

ADSL WAN Connections

ADSL Modules for the ProCurve Secure Router

Activating the ATM Subinterface

By default, all subinterfaces on the ProCurve Secure Router are shut down.

You must activate the ATM subinterface. From the ATM interface configura-

tion mode context, enter:

ProCurve(config-atm 1.1)# no shutdown

Configuring the VPI/VCI

ATM networks are fundamentally connection-oriented, which means that a

logical connection must be set up across the ATM network before any data

can be transmitted. After this connection is set up, there is only one possible

path for cells to take, so they cannot be received in the wrong order.

ATM setup standards define two types of ATM connections. (See Figure 7-7.)

■ Virtual path (VP)—Identified by a virtual path identifier (VPI)

■ Virtual channel (VC)—Identified by the VPI and a virtual channel

identifier (VCI)

VPIs and VCIs are established during the ATM connection setup phase. These

values are carried in the headers of ATM cells to facilitate ATM cell switching.

Figure 7-7. The VPI/VCI

Your public carrier will provide the VPI and VCI values for your ADSL

connection. From the ATM subinterface configuration mode context, set the

VPI/VCI by entering:

Syntax: pvc <vpi>/<vci>

Replace <vpi> with the number that your ADSL service provider gave you for

the VPI. The VPI can be a number between 0 and 255. Replace <vci> with the

unique number that your service provider has assigned to this connection. If

you establish more than one subinterface on an ATM interface, each subinter-

face will have a unique VCI. The VCI can be a number between 32 and 65535.

Virtual path (VP)

Transmission path

Virtual channels (VC)

HP ProCurve 7000dl Series User Manual

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