Billion Electric Company 5100S 4 RFC, VC-based Multiplexing, LLC-based Multiplexing

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BIPAC 5100S encapsulates the PPP session based on RFC1483 and sends it through an ATM PVC (Permanent Virtual Circuit) to the Internet Service Provider's (ISP) DSLAM (digital access multiplexer). Please refer to RFC 2364 for more information on PPPoA. Refer to RFC 1661 for more information on PPP.

3.2.4 RFC 1483

RFC 1483 describes two methods for Multiprotocol Encapsulation over ATM Adaptation Layer 5 (AAL5). The first method allows multiplexing of multiple protocols over a single ATM virtual circuit (LLC-based multiplexing) and the second method assumes that each protocol is carried over a separate ATM virtual circuit (VC-based multiplexing). Please refer to the RFC for more detailed information.

3.3 Multiplexing

There are two conventions to identify what protocols the virtual circuit (VC) is carrying. Be sure to use the multiplexing method required by your ISP.

3.3.1 VC-based Multiplexing

In this case, by prior mutual agreement, each protocol is assigned to a specific virtual circuit; for example, VC1 carries IP, etc. VC-based multiplexing may be dominant in environments where dynamic creation of large numbers of ATM VCs is fast and economical.

3.3.2 LLC-based Multiplexing

In this case one VC carries multiple protocols with protocol identifying information being contained in each packet header. Despite the extra bandwidth and processing overhead, this method may be advantageous if it is not practical to have a separate VC for each carried protocol, for example, if charging heavily depends on the number of simultaneous VCs.

3.4 VPI and VCI

Be sure to use the correct Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI) numbers assigned to you. The valid range for the VPI is 0 to 255 and for the VCI is 32 to 65535 (0 to 31 is reserved for local management of ATM traffic). Please see the appendix for more information.

3.5 Wizard Setup Configuration: First Screen

In the SITE MAP screen click Wizard Setup to display the first wizard screen.

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Contents Bipac 5100S Table of Contents LAN TCP/IP Appendix Getting to Know the Bipac 5100S Features of the Bipac 5100SIntroducing the Bipac 5100S Multiple PVC Permanent Virtual Circuits Support Multiplexing Applications for the Bipac 5100S Web Configurator Overview Introducing the Web ConfiguratorAccessing the Bipac 5100S Web Configurator Navigating the Bipac 5100S Web Configurator Resetting the Bipac 5100S Configuring PasswordUsing The Reset Button Wizard Setup Introduction Wizard SetupEncapsulation PPP over Ethernet4 RFC Wizard Setup Configuration First ScreenMultiplexing VC-based MultiplexingOr PPPoE IP Address and Subnet MaskIP Assignment with PPPoA or PPPoE Encapsulation IP Address AssignmentIP Assignment with RFC 1483 Encapsulation IP Assignment with Enet Encap EncapsulationPrivate IP Addresses Wizard Setup Configuration Second ScreenNailed-Up Connection PPP NATPPPoE 10.2 RFC Enet Encap Exactly as given IP Pool Setup Dhcp SetupWizard Setup Configuration Third Screen Dhcp Test Your Internet Connection Wizard Setup Configuration Connection TestsLAN Overview LAN SetupLANs, WANs and the Bipac 5100S DNS Server AddressDNS Server Address Assignment Factory LAN DefaultsMulticast RIP SetupConfiguring LAN TCP/IP WAN Overview WAN SetupPPPoE Encapsulation Pptp EncapsulationTraffic Shaping Configuring WAN SetupPPP Half Bridge When to use Half Bridge modeFollowing table describes the labels in this screen PPPoE Encap in the Encapsulation field NAT Overview Network Address Translation NATNAT Definitions What NAT DoesNAT Application How NAT WorksType IP Mapping NAT Mapping TypesSUA Single User Account Versus NAT Port Forwarding Services and Port NumbersSUA Server Services Port Number Configuring Servers Behind SUA ExampleConfiguring SUA Server Selecting the NAT ModeConfiguring Address Mapping Many-to-One and Server mapping types Editing an Address Mapping Rule NAT Address Mapping Rules screen Dyndns Wildcard Configuring Dynamic DNS Dynamic DNS SetupDynamic DNS Following table describes the labels in this screen Configuring Time Zone Time and Date SetupPage System Timeout Remote Management ConfigurationRemote Management Overview Remote Management LimitationsTelnet Configuring Remote ManagementFTP WebLabel Description Universal Plug-and-Play UPnP How do I know if Im using UPnP?Universal Plug and Play Overview NAT TraversalInstalling UPnP in Windows Example Configuring UPnPInstalling UPnP in Windows Me Installing UPnP in Windows XP Page Auto-discover Your UPnP-enabled Network Device Using UPnP in Windows XP ExampleWeb Configurator Easy Access Page Maintenance Overview MaintenanceSystem Status Screen Following table describes the labels in this screen System Statistics Dhcp Table Screen Diagnostic General Screen Diagnostic ScreensDiagnostic DSL Line Screen Reset Adsl Line Firmware Screen Page Using LEDs to Diagnose Problems TroubleshootingPower LED Cannot telnet into the Bipac 5100S Web ConfiguratorLAN Interface Login Username and PasswordWAN Interface Remote Management Internet AccessCannot connect to a remote node or ISP Remote Node Connection