3Com HomeConnect 3CP3647 Cli User's Manual

Also see for HomeConnect 3CP3647: Installation guide

Contents

3 M ANUAL SETUPThis chapter describes how to manually setup the 3Com HomeConnect ADSLModem Ethernet.ConfigurationOverview A bridge connects two or more physical networks together to function as a single,large network. The 3Com HomeConnect ADSL Modem Ethernet is a learningbridge. A learning bridge does more than just link networks; it separates networktraffic and forwards only the packets that need to be forwarded.Bridges separate traffic by examining the Media Access Control (MAC) addressescontained in data packets. MAC addresses uniquely identify each machineattached to a network segment. A data packet is not forwarded to anothersegment if its destination MAC address resides on the same segment as its source.To efficiently separate traffic, the bridge maintains a Bridge Forwarding Table. Thetable contains a list of MAC addresses and their associated network segments. Thetable is built dynamically from the source MAC addresses of data packets passingthrough the bridge.The 3Com HomeConnect ADSL Modem Ethernet bridge supports the SpanningTree Protocol (STP). This feature is used when two networks are joined by twobridges forming a looped network. STP prevents the data packets from circling thetwo networks.The 3Com HomeConnect ADSL Modem Ethernet is a 9-port bridge with a singleethernet port on the Ethernet physical interface (named eth:1) and 8 ATM PVCs(WAN ports) through the ATM/ADSL physical interface (named atm:1). Bridgeports are numbered 1through 9, with the Ethernet port designated as port 1. Bydefault, packets are not bridged between the WAN ports.The rest of this chapter provides an overview of the 3Com HomeConnect ADSLModem Ethernet basic operations and configuration. The chapter is broken intothe following sections:n Bridge Port Managementn Advanced Bridgingn IP Accessn System AdministrationManaging BridgePorts Each Bridge WAN Port (2-9) has an associated profile for storing informationabout the port. With this profile, you specify ATM Virtual Channel information,description information and whether the port is currently enabled or disabled.