Troubleshooting | IBM ATM OC-3c manual

D

TROUBLESHOOTING

How to Use this Guide to Troubleshoot

This troubleshooting section describes how to identify the cause of a problem and suggests possible solutions. Troubleshooting has been divided into four sections.

■Using LEDs

LEDs on the Switch and ATM Module provide valuable status information that can be used for troubleshooting. You may find it useful to familiarize yourself with these LEDs before reading the troubleshooting suggestions in the following sections.

■Identify the Problem

Use this section when you do not know the cause of the problem.

■Solving a known Problem

Use this section when you have detected a problem, and want to look up possible solutions. You should read this troubleshooting information in conjunction with the troubleshooting provided in the user guide that accompanies your Switch.

■Cleaning Dirty Fiber Optic Connectors

This section tells you how to clean the fiber optic connectors on the ATM Module and connecting cables.

If you have problems that are not addressed by troubleshooting information in this guide, contact IBM Technical Support, or your service person. For Technical Support information refer to Appendix E.

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IBM ATM OC-3c manual Troubleshooting, How to Use this Guide to Troubleshoot

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 Locating the Lecs Joining the ElanLEC must know the name of the Elan it is to join If the destination MAC address is listed in the ARP Table Address ResolutionMapping Ethernet and ATM Addresses What Happens to Broadcast and Multicast Frames? LAN Emulation Address Resolution Protocol LearpWhat Happens to Unicast Frames? ATM is Cell-based Asynchronous Transfer Mode ATM LayerATM Adaptation Layer AAL ATM is Connection-oriented ATM is Service Transparent Virtual Path Identifier VPI Virtual Channel Identifier VCI 7Switching Cells using VPI and VCI values Permanent Virtual Circuits PVCs Switched Virtual Circuits SVCsATM Interfaces Networkhostidentifier Interim Local Management Interface IlmiATM Address Registration 10ATM Cell Structure ATM Layer and Cell Structure Sonet STS-3c Physical Layer 16CHAPTER 2 Network Layer Concepts Virtual LAN Concepts What is a Virtual LAN VLAN?Creating Inter-switch VLANs 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 Device Support Pre-installation ProcedureCheck the Power Supply 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 Physical Connections Checking the Power SupplyChecking that the ATM Module is Installed Correctly 8CHAPTER 6 Installing and Setting UP the Module Correcting Text Entry Accessing Management FeaturesScreen Map Keyboard Shortcuts Screen Map Main Banner Logging On Automatic Logout User Name Default Access Level PasswordLogging Off 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 World Trade Safety Information Safety InformationSafety Notices 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 Cable Specification ATM Module Technical SpecificationsEnvironmental Specifications Numerical Aperture Specification DescriptionDoes the Cable Provide Sufficient Bandwidth? 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 Is the ATM Switch Using AAL5? Access the ATM Vlan LEC Status ScreenIs the LEC ATM Address Valid for the Default VLAN? 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 Self Test Post Power On Self Test Post FailureATM Module Fails Power on Far End Status LED indicates Cable Connection Problems Connections ATM ProblemsOnly showing reserved ATM Insufficient Resources Vlan or Elan ProblemsCommunicate with each Other Example To clean the cable connectors Cleaning Dirty Fiber Optic ConnectorsTo clean fiber optic connectors on the ATM Module IBM Bulletin Board System Technical Support and ServiceElectronic Support Voice Support 2APPENDIX E Technical Support and Service Trademarks Production Status Statement of Limited WarrantyIBM Warranty for Machines 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 Forum ATM SwitchGlossary 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