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Cabletron Systems STHI manual Troubleshooting, LANVIEW LED Signals, Chapter

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CHAPTER 4

Troubleshooting

This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems.

4.1 LANVIEW LED Signals

The STHI incorporates the Cabletron Systems LANVIEW Status Monitoring and Diagnostics System. These LEDs can help in the diagnosis of physical layer problems such as power failures or cable faults. Table 4-1 lists the LANVIEW LEDs and defines their messages:

Table 4-1. LANVIEW LED Signals

LED	Color	Condition


CPU	blinking	normal operations
	Green

	Red	malfunction

ACT	Green	normal frame received
	ﬂash

	Red	Beacon Recovery running
	ﬂash

16 Mb	Yellow	Ring Speed set to 16 Mbps.

	off	Ring Speed set to 4 Mbps.

MGMT	Green	management operational

	Red	management failure

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Cabletron Systems STHI manual Troubleshooting, LANVIEW LED Signals, Chapter

Contents

STHI INTELLIGENT TOKEN RING STACKABLE HUB USER’S GUIDE CABLETRON SYSTEMS, P. O. Box 5005 Rochester, NHCopyright May, 1995 by Cabletron Systems, Inc FCC NOTICE DOC NOTICECABLETRON SYSTEMS, INC PROGRAM LICENSE AGREEMENTAND DISCLAIMER OF LIABILITY EXCLUSION OF WARRANTYCABLETRON SOFTWARE PROGRAM LICENSE UNITED STATES GOVERNMENT RESTRICTED RIGHTS2.1 General Networking Considerations 2.2 Operating Specifications CHAPTER 4 Troubleshooting CHAPTER 5 Local ManagementAppendix A TPIM Specifications Appendix B Media Specifications 1.1 Contents of This Manual IntroductionCHAPTER 1.2 STHI OverviewSTHI Overview 1.2.1 LANVIEW LEDsLobe Port and Multiple Ring Out Port Configurations Ring Speed Fault ProtectionSTHI Overview 1.2.2 TCU PortsDaughter Board Upgrade Kit ConnectorSTHI Overview Active Circuitry1.2.5 Automatic Beacon Recovery Process STHI Overview1.2.4 Hub-By-Hub Bypass Control 1.2.6 Support for Passive MAU WorkgroupsSTHI Overview Improved Protection from Beaconing1.2.7 Flash Downloads 1.2.8 IP Address DiscoveryDAISY-CHAIN MAU CONFIGURATION RING OUT TCU MAU CONFIGURATIONAccess Units Multi-Station1.3 Related Manuals 1.4 Getting HelpRelated Manuals 1.2.9 Local ManagementLogin anonymous Password your email addressPostal Service Getting HelpRequirements & Speciﬁcations 2.1 General Networking ConsiderationsCHAPTER Maximum Number of Stations on a RingTemperature Installation RecommendationsGeneral Networking Considerations Crosstalk2.2 Operating Specifications Operating Specifications2.2.1 Hubstack Interconnect Cables 2.2.2 TCU and COM PortsOperating Specifications Figure 2-2. RJ45 to DB25 Connector PinoutOperating Specifications 2.2.3 Supported MIB GroupsStandard MIBs Cabletron Enterprise MIBsOperating Specifications 2.2.6 Safety2.2.5 Ring Sequence Hubs that are bypassed from the stack’s common ring mustOperating Specifications 2.2.9 Physical Specifications2.2.7 Computing Hardware 2.2.8 Environmental RequirementsInstallation 3.1 Installing the STHICHAPTER The package includes a 3-1/2” floppy disk containing aInstalling the STHI 3.1.2 Stacking the STHI3.1.3 Attaching the Strain Relief Bracket 3.1.4 Rack-Mounting the STHIInstalling the STHI 3.1.5 Wall-Mounting the STHIin the wall Installing the STHIFigure 3-4. Installing the Wall-Mounting Brackets Installing the STHI 3.1.6 Free-Standing Installations3.2 TPIM Installation 3.3 Finishing the InstallationTPIM Installation 3.1.7 Connecting the STHI to the Power SourceCHAPTER Troubleshooting4.1 LANVIEW LED Signals 4.2 Trouble Resolution Trouble ResolutionLoss Of Power Failure to Link on Enabled Port4.3 The Reset Button The Reset ButtonManagement services will be suspended during the reset process STHI-244.4 NVRAM Reset Switch NVRAM Reset SwitchCHAPTER 5.1 Accessing LMLocal Management Accessing LM 5.1.1 Dumb Terminal ConfigurationSetting Menu5.1.3 Entering LM Accessing LM5.1.2 Console Cable Configuration 5.2 Using LM Screens Using LM ScreensInvoking Menu Options or Screen Commands 5.2.1 Working with LM ScreensUsing LM Screens Setting or Modifying Fields1. Use the Tab key or arrow keys to highlight fields Exiting the Local Management Interface SessionUsing LM Screens 5.2.2 Screen Hierarchy5.2.3 Screen Introductions System LevelUsing LM Screens SNMP TrapsChassis Status View Component Status5.3 The System Level Screen Only a user with Super-User access can change the device’sThe System Level Screen 5.3.1 System Date and System Time5.3.4 Enable IP Address Discovery The System Level Screen5.3.3 Subnet Mask Retry IntervalNumber of Retries 5.3.5 Enable Beacon RecoveryThe System Level Screen 5.4 The SNMP Community Names Screen 5.3.7 Locally Administered AddressThe SNMP Community Names Screen Retry Interval5.4.2 Access Policy The SNMP Community Names Screen5.4.1 Community Name Read-onlyFigure 5-6. SNMP Traps Screen 5.5 The SNMP Traps ScreenThe SNMP Traps Screen 5.6 The Chassis Status View Screen 5.6.1 The Screen Mode Screen CommandThe Chassis Status View Screen Functions of the Chassis Status View Screen5.6.2 Multiplexer Configuration Fields The Chassis Status View ScreenThe Chassis Status View Screen 5.6.3 Port Configuration FieldsADMINISTRATIVE Mode ADMINISTRATIVE The Chassis Status View ScreenEach port field whether TPIM or TCU may be set as follows NEXTThe Chassis Status View Screen RING OUT ENABLE ModeFigure 5-9. Chassis Status View Screen in RING OUT ENABLE Mode OPERATIONAL Mode The Chassis Status View ScreenEach Ring port TPIM port or Ring Out TCU may be listed as Each station TCU port may be listed as5.7 The Component Status Screen 5.6.5 ENABLE ALL PORTSThe Component Status Screen 5.6.4 NEXT and PREVIOUS5.8 The Device Statistics Screen The Device Statistics Screen5.8.1 Screen Mode The Device Statistics ScreenTOTAL DELTAErrors Received The Device Statistics ScreenFrames Received KBytes ReceivedPorts Enabled The Device Statistics ScreenRing Status Ring NumberLine Errors Burst ErrorsAC Errors Abort Transmit ErrorsInternal Errors Lost Frame ErrorsFrame Copied Errors Rcvr Congestion Errors5.9 The SNMP Tool Screen Token ErrorsFrequency Errors The SNMP Tool ScreenThe SNMP Tool Screen 5.9.1 Community Name5.9.2 OID Prepend 5.9.3 GET5.9.5 STEP The SNMP Tool Screen5.9.4 GETNEXT The SNMP Tool Screen 5.9.6 WALK5.9.7 CYCLES 5.9.8 RECALL-OIDctDLForceOnBoot The SNMP Tool Screen5.9.10 REPEAT 5.9.11 Firmware Image DownloadsctDLInitiateColdBoot The SNMP Tool ScreenctDLCommitRAMtoFlash ctDLTFTPRequestTPIM Speciﬁcations APPENDIX AA.1 Overview A.2 Twisted Pair TPIM PinoutsA.3 Fiber Optic TPIM Specifications Fiber Optic TPIM SpecificationsFiber Optic TPIM Specifications A.3.1 TPIM-F2 for Multimode FiberFiber Optic TPIM Specifications ParameterTypical MinimumFiber Optic TPIM Specifications ParameterTypical MinimumB.1 Unshielded Twisted Pair UTP Media SpeciﬁcationsAPPENDIX B Unshielded Twisted Pair UTP OperatingB.2.1 STP Cable Categories B.2 Shielded Twisted Pair STPShielded Twisted Pair STP B.2.3 Mixed STP Cable Types Shielded Twisted Pair STPB.2.2 STP Lobe Lengths B.3 Single Mode and Multimode Fiber Optic Cabling Single Mode and Multimode Fiber Optic Cabling