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ZyXEL Communications Prestige 642 Appendix A, VPI & VCI, VPI, VCI, VPI, VCI, Virtual Path, Virtual Channel, Diagram 1 VPI's & VCI's

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Prestige 642 PPPoE Modem

Appendix A

VPI & VCI

This appendix describes VPI and VCI.

ATM is a connection-oriented technology, meaning that it sets up virtual circuits over which end systems communicate. The terminology for virtual circuits is as follows:

z	Virtual Channel	Logical connections between end stations
z	Virtual Path	A bundle of virtual channels

Think of a virtual path as a cable that contains a bundle of wires. The cable connects two points, and wires within the cable provide individual circuits between the two points. In an ATM cell header, a VPI (Virtual Path Identifier) identifies a link formed by a virtual path and a VCI (Virtual Channel Identifier) identifies a channel within a virtual path. The VPI and VCI are identified and correspond to termination points at ATM switches as shown. Your telephone company should supply you with these numbers.

Diagram 1 VPI's & VCI's.

Appendix A VPI and VCI

Contents

PPPoE Modem Copyright ZyXEL Limited Warranty Federal Communications Commission (FCC) Interference Statement Customer Support Table of Contents Chapter 4 Command Line Interface Chapter 6 Troubleshooting Appendix A VPI & VCI Glossary Index List of Figures List of Tables Preface General Syntax Conventions Bold Times Bold Arial What is DSL Page Getting to Know Your PPPoE Modem 1.1The Prestige 642 PPPoE Modem 1.2Features of the Prestige 642 PPPoE Modem Protocols Supported Networking Compatibility Multiplexing Full Network Management Diagnostic Capabilities 1.3Applications for the Prestige 642 PPPoE Modem 1.3.1 Internet Access Page Hardware Installation & Initial Setup 2.1Front Panel LEDs of the P642 2.2Rear Panel and Connections of the P642 2.2.1 Connecting the ADSL Line 2.2.2 Connecting a Computer to the Prestige 10/100M LAN Port 2.2.3 Connecting the Power Adapter to your Prestige 2.2.4 Connecting the Console Port 2.3Additional Installation Requirements 2.4Connecting a POTS Splitter 2.5Default Settings 2.6Turning On the Prestige Web Configurator 3.1Introduction 3.2Login and Welcome Screens 3.2.1 About the Login Screen 3.2.2 About the Welcome Screen 3.3Wizard Setup Screen 3.3.1 Wizard Setup — PPPoE Modem Screen Regardless of your particular situation, do not create an arbitrary IP address; Address Allocation for Private Internets Guidelines for Management of IP Address Space A Note about VPI and VCI Numbers Figure 3-5PPPoE Wizard Screen 3.3.2 Wizard Setup — Modem Screen Figure 3-6Modem Wizard Screen Table 3-2Modem Wizard Screen Description 3.3.3 Wizard Setup — Final Wizard Screen 3.4Advanced Setup 3.4.1 Advanced Setup — System Administration Screen 3.4.2 Advanced Setup — System Date & Time Screen 3.4.3 Advanced Setup — LAN Screen IP Address 3.4.4 Advanced Setup - LAN Status 3.4.5 Advanced Setup — NAT (Network Address Translation) Applications Multiple Servers behind NAT Table 3-7Common Services and Corresponding Port Numbers Port Number Server IP Address Manual Figure 3-12Advanced Setup — NAT Applications Screen Table 3-8Advanced Setup — NAT Applications Screen Description Table 3-9Applications and Port Numbers 3.4.6 Advanced Setup — Internet Security 3.5Maintenance 3.5.1 Maintenance — System Status Figure 3-14Maintenance — System Status Screen Table 3-11Maintenance — System Status Screen Description Page 3.5.2 Maintenance — System Statistics Table 3-12Maintenance — System Statistics Screen Description 3.5.3 Maintenance — Diagnostic Screen — General Tab 3.5.4 Maintenance — Diagnostic Screen — DSL Line Tab 3.6Logout Screen 3.6.1 About the Logout Screen Command Line Interface 4.1Getting Started 4.1.1 Initial Screen 4.1.2 Entering A Password 4.2Command Structure 4.2.1 Conventions for Using CI Commands 4.2.2 Using Abbreviated CI Commands 4.2.3 General CI Command Usage 4.3CI Commands 4.3.1 Set Related CI Commands 4.3.2 Set Related CI Commands — Examples 4.3.3 Show Related CI Commands 4.3.4 Show Related CI Commands — Example 4.3.5 Sys Related CI Commands 4.3.6 Sys Related CI Commands — Examples Sys Log Command Sys Time Command Sys Date Command Sys Trcpacket Channel Command Table 4-6Sys Trcpacket Channel CI Command — Optional Subcommand Meanings Sys Exit Command 4.3.7 WAN Related CI Commands 4.3.8 WAN Related CI Commands — Examples 4.3.9 Device Related CI Commands 4.3.10 Device Related CI Commands — Example 4.3.11 IP Related CI Commands 4.3.12 IP Related CI Commands — Examples IP Ping Command IP Route Status Command Page Firmware and Configuration Maintenance 5.1Filename Conventions 5.2Backup Configuration 5.2.1 Backup Configuration Using FTP 5.2.2 Using the FTP command from the DOS Prompt Figure 5-1FTP Session Example Third Party FTP Clients Table 5-2General Commands for Third Party FTP Clients 5.2.3 Backup Configuration Using TFTP 5.2.4 TFTP Command Example 5.2.5 Backup Via Console Port 5.3Restore Configuration 5.3.1 Restore Using FTP or TFTP 5.3.2 Restore Via Console Port 5.4Uploading Firmware Files 5.4.1 FTP File Upload 5.4.2 TFTP File Upload 5.4.3 Uploading Files Via Console Port Example Xmodem Firmware Upload Using HyperTerminal Figure 5-8Example Xmodem Upload Page Troubleshooting 6.1Problems Starting Up the Prestige 6.2Problems With the WAN Interface 6.3Problems with the LAN Interface 6.4Problems Connecting to a Remote Node or ISP Appendix A VPI & VCI Glossary Interface CPE Crossover Ethernet Cable Domain Name Configurator FAQ FCC Gateway Host LED LLC Loop-reach MAC Multiplexor POP Port Port (H/W) POTS PPP PVC RFC RIP Splitter STP Software TFTP Twisted Pair UDP URL ZyNOS Page Index