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3Com 7600 manual 12 ATM, LAN EMULATION, and Virtual Lans, 12-7

Models: 7600

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Monitoring Ports	11-5
Transparent Bridges	11-6
Store-and-Forward 11-6
Forwarding Database		11-7
Learning Station Addresses 11-7
Static Addresses	11-8
Spanning Tree Protocol		11-8
Re-configuring the Spanning Tree			11-10
Disabling the STP	11-10
Management Bridge Parameters			11-11
Bridged-LAN Environments in the 7600 Card 11-11
Local Bridged-LAN Environment			11-12
Connection to the ATM Network			11-12

12ATM, LAN EMULATION, AND VIRTUAL LANS

ATM Overview	12-1
ATM Basics 12-2
Cell Switching 12-2
Virtual Channels	12-3
Virtual Channel Connection			12-3
Virtual Path Connection		12-3
Permanent Virtual Channels			12-3
Switched Virtual Channels			12-4
Interim Local Management Interface (ILMI)				12-4
ILMI Management Information Base (MIB)					12-4
ATM Address Registration			12-5
LAN Emulation Overview		12-5
Emulated LAN Components		12-5
LAN Emulation Client		12-6
LAN Emulation Server		12-6
Broadcast and Unknown Server (BUS)				12-6
LAN Emulation Configuration Server (LECS)					12-7
Emulated LAN Connections		12-7
Control VCCs	12-7
LEC Control Frame Statistics Display				12-8
Data VCCs	12-8
LEC Configuration and Status Information					12-9

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3Com 7600 manual 12 ATM, LAN EMULATION, and Virtual Lans, 12-7

Contents

User Guide United States Government Legends Contents Power-Up Normal operation Fast Ethernet Status IndicatorsRapid Configuration Parameter Entry Quick Key Functions Menu IndexRemove a Static Address from FDB Display STP Enable Status Fast Ethernet Port Attributes and StatisticsDisplay Broadcast Throttling Attributes Display Bridge STP AttributesDisplay Current LEC Configuration Managing ATM ResourcesDisplay Snmp Configuration Update NMS IP AddressEnable/Disable Event Messages 10-14 Display Software Version 10-212 ATM, LAN EMULATION, and Virtual Lans 12-712-14 Bridge Frame Forwarding Logic12-15 13-5Fast Ethernet Card Specifications Physical C-1 Glossary If you are looking for information about Turn to About this GuideGuide Conventions Tables 1 and 2 list conventions used throughout this guideConventions 7600 Card Documentation and Related Manuals7600 Card Documentation Road Map If you want to ReadOverview of the 7600 Card AboutCard CardFront Panel of the 7600 Card with full configuration 3Physical module with SC connector for fiber ports Capabilities4CHAPTER 1 Overview of the 7600 Card Typical Applications of the 7600 Card 5Fast Ethernet backbone Server farm Starting UP Installation and POWER-UP Safety PrecautionsMesures de sécurité Vorsichtsmaßnahm en Card Modules InstallingRemoving Network Devices Connecting toConnection to a workstation or other DTE, using a normal Terminal Connecting to aLocal Management System Power green Fail red Active orange Card SystemStates How they are indicated on the LED displayPower-Up Power-up phase and initiates the Power-On Self-TestWhen the 7600 Card is powered-up, it automatically begins Mode Meaning and User Action4Fast Ethernet Port LEDs LED Color MeaningRapid Fast SetupConfiguration Setup Setup ModesFull Setup Mode CELLplexSetting Special Parameters Switch Setup ModeSetup Mode Selection 1Integrated Fast Setup Procedure Sections 2Setup Procedure Navigation AidsSetup Section Description SectionsIntegrated Fast Setup is initiated from the LMA Main Menu Select the menu item 9 FST Fast SetupOperation CELLplex 7000. The CELLplex Main Menu appears as followsExample Dialog The following dialog appears on the screen Network Prefix SectionUNI/NNI Parameters Section LE Parameters SectionLecs Address Section LE Client Configuration Section Virtual Network Configuration SectionAdmin VN Management Configuration Section Confirmation Dialog SectionSetup to perform a rapid configuration of the 7600 Card Multi-context FastPort Context Contex4Setup Procedure Navigation Aids Type To go toAdmin Main Menu appears as in the following example Elan Configuration Section Management Configuration SectionSystem Mode Configuration Section New configuration is displayed for this contextCard Management Tasks Menu Hierarchy Local Management BasicsManagement Main menu Example Keying in this submenu’s 4 option gives you the promptEntry of the stp submenu’s 3 option produces the prompt Finally, entering 1 finalizes the prompt as2Menu Navigation Functions 3Editing AidsSystem Management Menu Menu IndexMenu hierarchy Bridge Menu ATM MenuLAN Emulation Menu Virtual LAN Menu Network Management MenuConfiguring Virtual Lans Configuring BridgesDisplay Current Bridge2Bridge Configuration Parameters Attach FastEthernet Port to Enter 6 Following is displayedAttach Internal ATM Port to BridgeFast Ethernet port #3 is attached to bridge #1 Internal ATM port is attached to bridge #0Management Tasks Managing Fast Ethernet PortsManaging Ethernet Bridges Managing the Bridge Forwarding DatabaseFast Ethernet Port AttributesStatistics Managing the Spanning Tree Protocol Bridge-wide3Fast Ethernet Port Characteristics 2Ethernet Port Attributes4Ethernet Port Statistics Name DescriptionFollowing information for Port #1 is displayed 1Fast Ethernet Port Attributes and Statistics DisplayDisable a Fast Ethernet PortDisplay Broadcast ThrottlingBroadcast Throttling Enable/DisableThreshold 9Task Actions 10Task Actions for Fx Port TypeExample 1 for Tx port type Fast Ethernet Tx port #1 is set to half duplexExample 2 for Fx port type 11Task Actions for Tx Port Type13Bridge Attributes and Statistics 3Bridge Attributes and Statistics DisplayUpdate Bridge-agingTime Bridge-port16Bridge-port Attributes and Statistics 4Bridge Attributes and Statistics DisplayDisplay All Entries ForwardingDatabase 17 Task Actions5Forwarding Database Display Display Learned EntriesLearning Station Addresses on 19 Task Actions21Task Actions Display StaticForwarding Database see Static Addresses on 22Static Table Fields Bridge Ports Hex Value Bridge Ports Hex Value Static Addresses Allowed-to Binary Table23Hexadecimal Codes for Displaying Multiple Bridge Ports 7Static Table Display Static Forwarding Database of bridge #0, the MAC address Block a StaticAddress Remove a Static Address from FDBPorts #4 Database see Static Addresses onDisplay STP Enable Disable STP onAbout the STP enable status see Disabling the STP on Status30Bridge STP Attributes STP attributes for bridge #0 is displayed as follows 9Bridge STP Attributes DisplayBridge-wide STP ParametersExample Enter Update Bridge-forward DelayBridge-forward-delay for bridge #0 is set to 1500 secs STP Attributes 36Bridge-port STP AttributesAttributes of port #1 of bridge #0 are displayed as follows 10Bridge-port STP Attributes DisplayBridge-path-cost Bridge-path-cost for port #1 of bridge #0 is set toUpdate ATM parameters Managing ATM ResourcesManage ATM port Manage Bridge ATM addresses2ATM Port Attributes and Statistics Display ATM Port Attributes StatisticsEnter 4 Field Description Following sample ATM statistics report is displayed4ATM Address Fields Following is a sample ATM address display 2ATM Address Display5Task Actions Display TMMore information about Traffic Management in the 7600 Card Enable TM Toggles TM operation on and off9Task Actions Characteristic Range Default MeaningTM remote Client Database is displayed as follows Add TM Client Information see Display TM Clients onEnable/Disable ATM Port Admin StatusUp to enable the ATM port or down to disable the ATM port Selected version is saved in flashContext #0 Event ATM port Link Up Manage configuration parameters Managing LAN Emulation ClientsDisplay statistics Manage operational parametersUpdate Unknown Unicast-flood- Mode Display LECManage data-frame parameters Transmission over an Elan onEnter 5 1 LES Information Description 4LEC Configuration and Status InformationLecs Information Description 2LEC Configuration and Status Display BUS Information DescriptionUpdate Lecs Enter the bridge number and ATM address or ! to invalidateSee LAN Emulation Overview on Elan name for the LEC of bridge #0 is enteredEnable Lecs Address via IlmiLES address for the LEC of bridge #0 is entered LAN Emulation Overview onOperational 10. For more information see LEC Parameters on10LEC Operational Parameters LEC Parameter DescriptionUpdate LEC Update the LEC operational parameters control-timeoutVCC-timeout-period, aging-time, forward-delay-time Control-timeout parameter in secondsEnter 533 0 Enter 535 0 18Task Actions 19Task Actions Control-frame Refer to -21. For more information see Emulated LANConnections on 20Task ActionsEnter 54 16CHAPTER 8 Managing LAN Emulation Clients Update Unknown Unicast-floodMode Unknown Unicast Frames onLE flood mode for Bridge #0 is now NotFlood Setting Network Parameters Display Snmp Configuration Update NMS IP Address2IP Configuration Information Display Current IPUpdate Default IP Address for bridge #0 is updated toDefault Gateway for the specified bridge Default Gateway for bridge #0 is updated toDisplay Snmp Update SubnetMask Update NMS IP TrapsManaging System Functions Resetting system Display SoftwareVersion Manage event messagesSoftware from Network Download StatusDownload Erase Software From FlashSoftware from LocalDisplay Hardware Configuration Current system configuration mode Set SystemSet Store-and Forward ModeAfter the next reset 9Timeout Parameters Display TimeoutFor descriptions of the timeout parameters Following is a sample timeout parameters report CPI Timeout Delay DelaysUpdate Hardware Update Software Software timeout mechanismWrite-access PasswordUpdated Admin-access Event MessagesSystem hardware is reset and device is rebooted Enter 1III 7600 Card Capabilities Overview EthernetFast Ethernet Auto-negotiation Full or Half Duplex Mode10/100 Mbps transmission speed Transceiver type Cable type Number Pairs fibers 10 or 100 Mbps Speed2Cable Support by Transceiver Type Fast Ethernet Ports 11-6CHAPTER 11 Ethernet Lans and Bridges in the 7600 Card Transparent Bridges Spanning Tree ProtocolAddress of a bridge port, called Self Can be defined as followsSpanning Tree Protocol Designated Bridge on a LAN Spanning Tree port selection 4Port-dependent bridge parameters Parameters in -4 are set for individual bridge ports3Port-independent Bridge Parameters 11-12CHAPTER 11 Ethernet Lans and Bridges in the 7600 Card Virtual Lans ATM OverviewATM Basics Virtual Channels Interim Local Interface IlmiLAN Emulation BUS Emulated LAN ConnectionsLAN Emulation Control VCCsIllustrates the VCCs active among LAN Emulation Components 3LEC Configuration and Status Information Elan NameBridge acts like a standard transparent bridge BridgesBoth local and remote destination LANs in the ATM network 2Bridges in the 7600 Card 12-12CHAPTER 12 ATM, LAN EMULATION, and Virtual Lans Bridges in the 7600 Card Entry obtained by Topology flag Aged by Unknown unicast flooding mode 5Unknown Unicast Flooding ModeMode Bridge action Data Transmission over an ElanParameter Description Minimum Default Maximum LEC ParametersFlush protocol Be set by managementVirtual LANs 12-18CHAPTER 12 ATM, LAN EMULATION, and Virtual Lans Virtual LANs in the 7600 Card 12-20CHAPTER 12 ATM, LAN EMULATION, and Virtual Lans Workgroups Each vLAN communicates with its server6Logical and Physical View of a Network With vLANs How Traffic Management is implemented within the 7600 Card ATM NetworkTopics are discussed 1Example of a source to destination ABR control loop Traffic Management ConceptsThis congestion information Generate backward RM-cellsTraffic FunctionsConfiguration ATM technology without having cell loss due to congestion7600 Card checks connected devices for Traffic Management Found in the connected device13-6CHAPTER 13 Traffic Management in the ATM Network As shown. The traffic management is performed as follows 2Traffic Management control stepsDevice Management ProtocolsIn-Band Out-of-BandLocal Management 27600 Card Administration Console Snmp Agents Interface Evolution MIB Ncdchass MIB private Management Information Bases MIBsBridge MIB AToM MIB LE Client MIB Security 5Local Management Protocol Access Tuning Store-and-Forward ModeTimeout Tuning Cut-Through ModeCard for extended periods of time. This usually occurs when Terminating them as erred framesConsole Passwords Services ServiceOn-Line Technical 3Com Bulletin BoardCountry Fax Number Table A-2Automated Fax ServicePress Enter to see the Ask3Com main menu Table A-3Telephone Support Country Telephone NumberTable A-6Local Access Numbers Table A-4Network Supplier SupportTable A-5Obtaining an RMA Number Country Telephone Number Fax NumberTroubleshooting Cleaning Dirty Fiber Optic Cables Related Diagnostic Procedures Fast Ethernet Card C Specifications Fast Ethernet SwitchingPhysical InterfacesIndicators EnvironmentalStandards Compliance Glossary Equipment DCE Interface NNI Out-of-band Point-to-point callCall ProtocolInterface UNI Index NumbersBUS Elan LEC ID NNI STP VCC Index