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Contents CoreBuilder 5000 ATM Backbone SwitchModule User Guide Bayfront Plaza 3Com CorporationSanta Clara, California 95052-8145Contents LAN Emulation Overview Configuring the ATM Backbone Switchmodule Internet Group Management Protocol Igmp Snooping Troubleshooting Technical Support Figures Page Tables Page Introduction About this GuideAudience GuideConventions SETDefault !0 -IP NETaddr =Icon Type Description Convention DescriptionKeys CommandsAbout this Guide Related Documents About this Guide Introduction SwitchModuleATM Backbone OverviewSwitched Virtual Circuit Capacity ATM Forum Specification ComplianceMultiple Redundancy Levels CoreBuilder 5000 Chassis CompatibilitySupported CoreBuilder SwitchModules Hot Swap Feature Standards ATM Backbone SwitchModule ArchitectureStandards MIBsATM Backbone SwitchModule Architecture Descriptions 2ATM Backbone SwitchModule Base ConfigurationATM Backbone SwitchModule Descriptions PacketChannel PacketChannel plus ATM Cell-Switching SwitchChannelBackplane DescriptionSlot, or 4Example Base Configuration Sample ATM Backbone SwitchModule ConfigurationsNNI 6Example Dual-Homing/Module Redundancy Configuration Configuration cardsSample ATM Backbone SwitchModule Configurations 14CHAPTER 1 Introduction LAN Emulation Overview 2ATM Backbone SwitchModule Function Components LAN EmulationBridgeport-LEC Broadcast and Unknown Server BUSEmulated LAN Elan Virtual Bridge vbridge6Converting SwitchModule Packets to and from ATM Cells Control VCCs LAN Emulation Connections8Data VCCs in ATM Backbone SwitchModule LAN Emulation LAN Emulation Operation 10CHAPTER 2 LAN Emulation Overview LAN Emulation Operation 12CHAPTER 2 LAN Emulation Overview Configuring the ATM Backbone Switchmodule Transcend Network Control Services for Unix Transcend Network Management Software for Windows Configuration ToolsThird-Party SNMP-Based Tools 2Windows Tools for Configuring ATM Backbone SwitchModulesAccess Setting Up DMMDMM management tools DMM DMMConfiguration ConfigurationLAN Emulation Configuration Bridge ConfigurationCB5000 set atm slot universion version ATM ConfigurationConfiguring LAN EmulationParameters CB5000 set module slot.1 phyautomaticfailover enable Configuring ATMOC-3 Card RedundancyCB5000 set atm slot.1 lossofsignallingdelay seconds Configuring IgmpCB5000 set module 9.1 igmpsnooping enable CB5000 set vbridge 1 igmpsnooping mode enableCB5000 show vbridge 1 igmpsnooping status CB5000 reset module12CHAPTER 3 Configuring the ATM Backbone Switchmodule Status Monitoring Statistics CB5000 show vbridge all configuration noverbose Displaying General Vbridge Configuration InformationCB5000 show vbridge all configuration verbose Displaying Detailed Vbridge Configuration InformationDisplaying Igmp Snooping Vbridge Information CB5000 show vbridge 11 igmpsnooping statusOption Information Shown CB5000 show module 4.1 verbose CB5000 show bridgeport 4.all Displaying General Status InformationCB5000 show bridgeport 4.2 verbose Displaying Detailed InformationCB5000 show count bridgeport 4.2 igmpsnooping CB5000 show counter bridgeport 4.2 interfaceLearp CB5000 show atm 4 interfaceCB5000 show atm 4 q93b CB5000 show atm 4 ilmiconfigurationCB5000 show atm 4 qsaal CB5000 show atm 4 signalconfigurationCB5000 show atm 4 trafficdescriptor all CB5000 show atm 4 statisticsCB5000 show atm 4 vcc all BUS CB5000 show bportlec 4.2 configurationCB5000 show bportlec 4.2 status CB5000 show bportlec 4.2 statisticsCB5000 show bportlec 4.2 learptable all CB5000 show bportlec 4.2 servercircuitsCB5000 show sonet 13.1 status Sectionlinepath CB5000 show sonet 7.1 statistics interval allCB5000 show igmpsnooping module Ianaiftype MIB Using Graphical Interface Tools 22CHAPTER 4 Status Monitoring and Statistics Internet Group Management Protocol Igmp Snooping Before implementing Igmp snooping Shows a typical packet path before snooping occurs 2Format of an Igmp Version 1 Message Overview Support CoreBuilderLocating Multicast RoutersEnabling Igmp Snooping on CoreBuilder 5000 SwitchModules Shows a typical FTE Dram address forwarding entry Troubleshooting Troubleshooting Using LEDsVerifying Base Module LED Operation Module Status LED State Reading the Base Module LEDsLED State Possible Cause Corrective Action Determining Corrective ActionActive CB5000 show module all DMM6CHAPTER 6 Troubleshooting Card Functions Card functions Signaling Functions CB5000 show atm slot interfaceCB5000 set atm slot universion CB5000 set bportlec slot.lec mode enable CB5000 show bportlec slot.lec configurationFunctions CB5000 show atm slot vcc allCB5000 show bportlec slot.lec status CB5000 show bridgeport slot.lec verbose CB5000 show atm slot statisticsCB5000 show counter bridgeport slot.lec interface Power up self-test diagnostics Obtaining Technical Assistance 14CHAPTER 6 Troubleshooting Specifications SpecificationsEnvironmental MechanicalPower ATM OC-3 Card Fiber Optic SpecificationsSpecification Value Services ServicesTechnical Support Online TechnicalPassword your Internet e-mail address Access by Analog ModemHostname ftp.3com.com Country Data Rate Telephone NumberAccess by Digital Modem 847 262408 727 Country Telephone Number Asia, Pacific Rim Europe, South Africa, and Middle EastCountry Telephone Number Fax Number 6APPENDIX B Technical Support Numbers IndexLane URL B-1 Index 3Com Corporation Limited Warranty Warranties Exclusive