Solving Known Problems | IBM ATM OC-3c instruction

Solving Known Problems

D-17

Solving Known Problems

Use this section if you have already pin-pointed the problem, and wish to look up possible solutions. Solutions are presented as a series of tables, and each table relates to a logical problem area:

■Power Supply problems

■Power On Self Test (POST) failure

■Cable connection problems

■ATM problems

■VLAN or ELAN problems

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IBM ATM OC-3c manual Solving Known Problems

Contents

User’s Guide Research Triangle Park NC First Edition October Contents Accessing Management Features Screen Map Glossary Bibliography Page ATM Terminology About this GuideIntroduction Terminology Icon Alerts you to Finding Information in This GuideConventions Task Location Bold Related Documentation About this Guide ATM Benefits Features and Benefits Wire Rate Transmission on ATM port ATM Module Features Layered Network Architecture Network Layer Concepts Upper Layer Protocols What is LAN Emulation LANE? LAN Emulation Server LES LAN Emulation Configuration Server LecsLAN Emulation Components LAN Emulation Client LEC LAN Emulation and IBM Devices LAN Emulation Components in Your Network Joining the Elan LEC must know the name of the Elan it is to joinLocating the Lecs Address Resolution Mapping Ethernet and ATM AddressesIf the destination MAC address is listed in the ARP Table LAN Emulation Address Resolution Protocol Learp What Happens to Unicast Frames?What Happens to Broadcast and Multicast Frames? Asynchronous Transfer Mode ATM Layer ATM Adaptation Layer AALATM is Cell-based ATM is Connection-oriented ATM is Service Transparent Virtual Path Identifier VPI Virtual Channel Identifier VCI 7Switching Cells using VPI and VCI values Switched Virtual Circuits SVCs ATM InterfacesPermanent Virtual Circuits PVCs Interim Local Management Interface Ilmi ATM Address RegistrationNetworkhostidentifier 10ATM Cell Structure ATM Layer and Cell Structure Sonet STS-3c Physical Layer 16CHAPTER 2 Network Layer Concepts What is a Virtual LAN VLAN? Creating Inter-switch VLANsVirtual LAN Concepts 2VLAN to Elan Mapping Extending VLANs into the ATM Network Extending VLANs into the ATM Network 4CHAPTER 3 Virtual LAN Concepts Can your ATM devices communicate with each other? Putting Your ATM Network TogetherPlanning Your Network Does your existing ATM network have sufficient resources? Extending VLANs Through the ATM Network ATM Configuration Rules ATM Connections Within Your Network Are the LAN Emulation services configured correctly? 1SVC Signalling Not Supported in Remote Edge-device ATM Backbone in the Building Network Configuration Examples Campus Configuration Campus Configuration Making a Building Resilient to Network Failure 3Resilient Link Configuration Following Safety Information Installing and Setting UP the Module Ebezpečí Îïàñíî Pre-installation Procedure Check the Power SupplyDevice Support 1Fitting the ATM Module Installation Power On Self Test Post Post-Installation ChecksConnecting a cable to the ATM Port Powering Up the Switch LED Summary Checking the Power Supply Checking that the ATM Module is Installed CorrectlyChecking the Physical Connections 8CHAPTER 6 Installing and Setting UP the Module Correcting Text Entry Accessing Management FeaturesScreen Map Keyboard Shortcuts Screen Map Main Banner Logging On User Name Default Access Level Password Logging OffAutomatic Logout 1Management Screen Map Managing the ATM Module 2ATM Module Configuration Screen Configuring an ATM Port Desired Value of VPI Number of bits Required Configuring an ATM Port 3ATM LEC Setup Screen Displaying all VLANs 4Switch Management Screen 5VLAN Selected Screen ATM Port Setup Problem Solution 7ATM Port Setup Screen 8ATM ARP Table Screen Mapping Far End MAC Addresses Mapping Far End MAC Addresses Creating a MAC Address to ATM Entry Deleting an Address Entry Displaying an ATM ConnectionFinding an Address Entry Updating Address Entries Finding an ATM Connection Setting Up Resilient Links Upgrading Software 10Software Upgrade Screen Error Messages Load Paused Status MessagesActive Download successful 1Status Monitoring Screen Map Monitoring the ATM Module ATM Physical Layer Statistics screen Statistics OverviewMonitoringUse Physical Connection ATM Port Statistics 2Switch Management Screen 4CHAPTER 9 Monitoring the ATM Module 4ATM Vlan LEC Status Screen ATM Vlan LEC Status LEC State Description State Possible Causes Possible Solutions NoneTimeout Undefined Error Duplicate LAN State Possible Causes Possible Solutions Invalid RequestState Possible Causes Possible Solutions Duplicated ATM Parameters No Configuration State Possible Causes Possible Solutions InsufficientState Possible Causes Possible Solutions Invalid Access Denied Connecting to BUS State Possible Causes Possible SolutionsError Configuration Following button is available on this screen ATM Physical Layer Statistics ATM Physical Layer Statistics Using Physical Layer Statistics to Troubleshoot ATM Physical Layer Statistics 14CHAPTER 9 Monitoring the ATM Module Safety Information Safety NoticesWorld 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 ATM Module Technical Specifications Environmental SpecificationsATM Cable Specification Specification Description Does the Cable Provide Sufficient Bandwidth?Numerical Aperture Example 4APPENDIX C ATM Module Technical Specifications How to Use this Guide to Troubleshoot Troubleshooting Using LEDs Identifying the Problem Figure D-1Troubleshooting Flow Diagram Are there Physical Layer Errors? Access the Physical Layer Statistics Screen Check the Physical Connections Access the ATM Port Setup Screen Are Cells being transmitted and received? Is the ATM Port Enabled?Enable the ATM Port Access the ATM Port Statistics Screen Access the ATM Vlan LEC Status Screen Is the LEC ATM Address Valid for the Default VLAN?Is the ATM Switch Using AAL5? Both Devices Must be AAL5 Compliant Access the ATM Module Configuration ScreenIs Signalling Compatible? Make Signalling Compatible Make the MAX VPI and VCI Bits Compatible Is the Ilmi Connection Set Up Correctly?Make Ilmi VPI/VCI Same at Both Ends of the Link Are the MAX VPI and VCI Bits Compatible? Operational Why has the LEC Operation Failed? State Possible Causes LEC is trying to join Is the LEC Operational Now? Re-map or Route the LEC Elan Configuration ProblemsHas the Problem been Solved? Are the LECs on the Same Emulated LAN? Use routing Is the MAC Address in the Switch Database?Enter the MAC Address in the Switch Database Is There Still a Problem? Solving Known Problems Few minutes Power Supply ProblemsSwitch powers up but then Shuts itself down after a Power On Self Test Post Failure ATM Module Fails Power onSelf Test Post Far End Status LED indicates Cable Connection Problems ATM Problems Only showing reserved ATMConnections Insufficient Resources Vlan or Elan ProblemsCommunicate with each Other Example Cleaning Dirty Fiber Optic Connectors To clean fiber optic connectors on the ATM ModuleTo clean the cable connectors IBM Bulletin Board System Technical Support and ServiceElectronic Support Voice Support 2APPENDIX E Technical Support and Service Trademarks Statement of Limited Warranty IBM Warranty for MachinesProduction Status Extent of Warranty Warranty Service Limitation of Liability Federal Communications Commission FCC Statement Electronic Emission Notices European Union EU Statement Information To The User How to Identify and Resolve Radio-TV Interference Problems ATM Switch GlossaryATM Forum Connectionless ByteCell Cell Header Link LAN Emulation Lane Payload MultiplexOctet OC-n UNI Telnet Virtual Channel VCI Books Asynchronous Transfer Mode ATMBibliography LAN Emulation Lane Bibliography ATM Index SDH STM-1 Sonet Index