LAN Emulation Components in Your Network | IBM ATM OC-3c instruction

2-4CHAPTER 2: NETWORK LAYER CONCEPTS

LAN Emulation Components in Your Network

Each Emulated LAN consists of a single LANE Service, and a number of LAN Emulation clients.

A LANE Service consists of:

■A LAN Emulation Server (LES)

■A Broadcast and Unknown Server (BUS)

■Optional LAN Emulation Configuration Server (LECS).

Figure 2-2 shows a logical view of a typical ELAN.

Figure 2-2LAN Emulation Components

The router shown in Figure 2-2 is not a LAN Emulation component, but would be required should a device on one Emulated LAN need to communicate with a device on another Emulated LAN.

You may wish to have more than one LECS on your network for security reasons. For example, you may wish the Finance department to be controlled by one LECS and the rest of your network to be controlled by a different LECS.

LAN Emulation and IBM Devices

LAN Emulation components are implemented in ATM devices. The LAN Emulation standards (referenced in the Bibliography) do not specify how each vendor implements each of these components.

Image 16

IBM ATM OC-3c manual LAN Emulation Components in Your Network, LAN Emulation and IBM Devices

Contents

User’s Guide First Edition October Research Triangle Park NC Contents Accessing Management Features Screen Map Glossary Bibliography Page About this Guide IntroductionTerminology ATM Terminology Finding Information in This Guide ConventionsTask Location Icon Alerts you to Related Documentation Bold About this Guide Features and Benefits ATM Benefits ATM Module Features Wire Rate Transmission on ATM port Network Layer Concepts Layered Network Architecture What is LAN Emulation LANE? Upper Layer Protocols LAN Emulation Configuration Server Lecs LAN Emulation ComponentsLAN Emulation Client LEC LAN Emulation Server LES LAN Emulation Components in Your Network LAN Emulation and IBM Devices LEC must know the name of the Elan it is to join Joining the ElanLocating the Lecs Mapping Ethernet and ATM Addresses Address ResolutionIf the destination MAC address is listed in the ARP Table What Happens to Unicast Frames? LAN Emulation Address Resolution Protocol LearpWhat Happens to Broadcast and Multicast Frames? ATM Adaptation Layer AAL Asynchronous Transfer Mode ATM LayerATM is Cell-based ATM is Service Transparent ATM is Connection-oriented Virtual Path Identifier VPI Virtual Channel Identifier VCI 7Switching Cells using VPI and VCI values ATM Interfaces Switched Virtual Circuits SVCsPermanent Virtual Circuits PVCs ATM Address Registration Interim Local Management Interface IlmiNetworkhostidentifier ATM Layer and Cell Structure 10ATM Cell Structure Physical Layer Sonet STS-3c 16CHAPTER 2 Network Layer Concepts Creating Inter-switch VLANs What is a Virtual LAN VLAN?Virtual LAN Concepts Extending VLANs into the ATM Network 2VLAN to Elan Mapping Extending VLANs into the ATM Network 4CHAPTER 3 Virtual LAN Concepts Putting Your ATM Network Together Planning Your NetworkDoes your existing ATM network have sufficient resources? Can your ATM devices communicate with each other? ATM Configuration Rules Extending VLANs Through the ATM Network Are the LAN Emulation services configured correctly? ATM Connections Within Your Network 1SVC Signalling Not Supported in Remote Edge-device Network Configuration Examples ATM Backbone in the Building Campus Configuration Campus Configuration 3Resilient Link Configuration Making a Building Resilient to Network Failure Installing and Setting UP the Module Following Safety Information Îïàñíî Ebezpečí Check the Power Supply Pre-installation ProcedureDevice Support Installation 1Fitting the ATM Module Post-Installation Checks Connecting a cable to the ATM PortPowering Up the Switch Power On Self Test Post LED Summary Checking that the ATM Module is Installed Correctly Checking the Power SupplyChecking the Physical Connections 8CHAPTER 6 Installing and Setting UP the Module Accessing Management Features Screen MapKeyboard Shortcuts Correcting Text Entry Screen Map Logging On Main Banner Logging Off User Name Default Access Level PasswordAutomatic Logout Managing the ATM Module 1Management Screen Map Configuring an ATM Port 2ATM Module Configuration Screen Configuring an ATM Port Desired Value of VPI Number of bits Required 3ATM LEC Setup Screen 4Switch Management Screen Displaying all VLANs ATM Port Setup 5VLAN Selected Screen 7ATM Port Setup Screen Problem Solution Mapping Far End MAC Addresses 8ATM ARP Table Screen Creating a MAC Address to ATM Entry Mapping Far End MAC Addresses Displaying an ATM Connection Finding an Address EntryUpdating Address Entries Deleting an Address Entry Setting Up Resilient Links Finding an ATM Connection 10Software Upgrade Screen Upgrading Software Error Messages Status Messages ActiveDownload successful Load Paused Monitoring the ATM Module 1Status Monitoring Screen Map Statistics Overview MonitoringUsePhysical Connection ATM Physical Layer Statistics screen 2Switch Management Screen ATM Port Statistics 4CHAPTER 9 Monitoring the ATM Module ATM Vlan LEC Status 4ATM Vlan LEC Status Screen State Possible Causes Possible Solutions None TimeoutUndefined Error LEC State Description State Possible Causes Possible Solutions Invalid Request State Possible Causes Possible Solutions Duplicated ATMParameters Duplicate LAN State Possible Causes Possible Solutions Insufficient State Possible Causes Possible Solutions InvalidAccess Denied No Configuration State Possible Causes Possible Solutions ErrorConfiguration Connecting to BUS ATM Physical Layer Statistics Following button is available on this screen ATM Physical Layer Statistics Using Physical Layer Statistics to Troubleshoot ATM Physical Layer Statistics 14CHAPTER 9 Monitoring the ATM Module Safety Notices Safety InformationWorld Trade Safety Information 2APPENDIX a Safety Information Safety Notices Neodstraňujte desky modulů, pokud je připojeno napájení Safety Notices 6APPENDIX a Safety Information Safety Notices 8APPENDIX a Safety Information Screen Access Rights 2APPENDIX B Screen Access Rights Environmental Specifications ATM Module Technical SpecificationsATM Cable Specification Does the Cable Provide Sufficient Bandwidth? Specification DescriptionNumerical Aperture Example 4APPENDIX C ATM Module Technical Specifications Troubleshooting How to Use this Guide to Troubleshoot Using LEDs Identifying the Problem Figure D-1Troubleshooting Flow Diagram Access the Physical Layer Statistics Screen Are there Physical Layer Errors? Access the ATM Port Setup Screen Check the Physical Connections Is the ATM Port Enabled? Enable the ATM PortAccess the ATM Port Statistics Screen Are Cells being transmitted and received? Is the LEC ATM Address Valid for the Default VLAN? Access the ATM Vlan LEC Status ScreenIs the ATM Switch Using AAL5? Access the ATM Module Configuration Screen Is Signalling Compatible?Make Signalling Compatible Both Devices Must be AAL5 Compliant Is the Ilmi Connection Set Up Correctly? Make Ilmi VPI/VCI Same at Both Ends of the LinkAre the MAX VPI and VCI Bits Compatible? Make the MAX VPI and VCI Bits Compatible Why has the LEC Operation Failed? Operational State Possible Causes LEC is trying to join Is the LEC Operational Now? Elan Configuration Problems Has the Problem been Solved?Are the LECs on the Same Emulated LAN? Re-map or Route the LEC Is the MAC Address in the Switch Database? Enter the MAC Address in the Switch DatabaseIs There Still a Problem? Use routing Solving Known Problems Power Supply Problems Switch powers up but thenShuts itself down after a Few minutes ATM Module Fails Power on Power On Self Test Post FailureSelf Test Post Cable Connection Problems Far End Status LED indicates Only showing reserved ATM ATM ProblemsConnections Vlan or Elan Problems Communicate with eachOther Insufficient Resources Example To clean fiber optic connectors on the ATM Module Cleaning Dirty Fiber Optic ConnectorsTo clean the cable connectors Technical Support and Service Electronic SupportVoice Support IBM Bulletin Board System 2APPENDIX E Technical Support and Service Trademarks IBM Warranty for Machines Statement of Limited WarrantyProduction Status Warranty Service Extent of Warranty Limitation of Liability Electronic Emission Notices Federal Communications Commission FCC Statement European Union EU Statement Information To The User How to Identify and Resolve Radio-TV Interference Problems Glossary ATM SwitchATM Forum Byte CellCell Header Connectionless LAN Emulation Lane Link Multiplex OctetOC-n Payload Telnet UNI VCI Virtual Channel Asynchronous Transfer Mode ATM BibliographyLAN Emulation Lane Books Bibliography Index ATM SDH STM-1 Sonet Index