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Cabletron Systems MICROMMAC-22T, 42T manual Chapter Troubleshooting, USING LANVIEW LEDs

Models: 42T MICROMMAC MICROMMAC-22T

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CHAPTER 5

CHAPTER 5

TROUBLESHOOTING

This chapter describes and explains how to use LANVIEW LEDs and the Liquid Crystal Display (LCD) to troubleshoot physical layer network problems. The chapter concludes with an overview of the POWER UP Diagnostic Test.

5.1 USING LANVIEW LEDs

LANVIEW LEDs (located on the front panel) are Cabletron Systems’ built-in visual diagnostic and status monitoring system. Use the LEDs to monitor network status or diagnose physical-layer network problems. Table 5-1 below lists and describes front panel LEDs.

Table 5-1. LANVIEW LEDS

LED NAME	LED COLOR	DEFINITION


Lobe Port Status	Off	No Link/Port Enabled
(Ports 1-24)	Green	Link/Port Enabled
	Red	No Link/Port Disabled
	Red (blinking)	Link or Ring Speed Fault/Port Disabled

16Mb/s	Yellow	16MbpsRing Speed
(Ring Speed)	Off	4 Mbps Ring Speed

ACT	Green (Flashing)	Good Frames
(Network Activity)	Red (Flashing)	Beacon Recovery Running
	Off	No Activity

MGMT	Green	Management Agent Active
(Network Management)	Red	Management Agent Not Active

CPU	Off	No Power
(Central Processing Unit)	Green (Flashing)	CPU Initializing
	Green (Blinking)	CPU Functioning (normal)
	Red	CPU Not Functioning
	Yellow	Diagnostic Testing
	Yellow/Green	Booting

NOTE: “Flashing” indicates an irregular LED pulse. “Blinking” indicates a steady LED pulse.

5-1

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Cabletron Systems MICROMMAC-22T, 42T manual Chapter Troubleshooting, USING LANVIEW LEDs

Contents

USER’S GUIDE MICROMMAC-22T/24T/42T/44T STACKABLE TOKEN RING INTELLIGENT HUBSCopyright March 1996 by Cabletron Systems, Inc DOC NOTICE FCC NOTICEVCCI NOTICE CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITYCABLETRON SOFTWARE PROGRAM LICENSE UNITED STATES GOVERNMENT RESTRICTED RIGHTS CHAPTER 2 REQUIREMENTS/SPECIFICATIONS CONTENTSCHAPTER 3 INSTALLATION CHAPTER 1 INTRODUCTIONCHAPTER 4 LOCAL MANAGEMENT CHAPTER 5 TROUBLESHOOTINGCONTENTS 5.2.4 Saved System Messages 5.3 VIEWING POWER UP DIAGNOSTIC TESTSCHAPTER INTRODUCTION 1.1 CONTENTS OVERVIEWDISPLAY RESET Figure 1-1. The MicroMMAC-TINTRODUCTION 1.2 MicroMMAC-T OVERVIEWTelnet 1.3 MicroMMAC-T FEATURESFigure 1-2. Typical MicroMMAC-T Conﬁguration Scenario Speed Fault Protection Cable Signal PolarityActive TCU Ports Local ManagementCabletron’s Distributed LAN Monitor Mode Ring Speed SwitchFlash EEPROM LANVIEW LEDsCOM Port Applications Reset ButtonLCD and LCD Display Button MIB SupportRMON MIB Support Table 1-2. RMON MIB RFC 1271/1513 Support Cont 1.4 STACKABLE CAPABILITIESFigure 1-3. Typical Stackable Conﬁguration 1.5 BRIDGING/ROUTING CAPABILITIES1.6 REMOTE MANAGEMENT CAPABILITIES 1.5.1 SNA/WAN Integration1.7 TELNET CAPABILITIES 1.9 GETTING HELP 1.8 RECOMMENDED READINGLocal Area Networks, Token Ring Access Method, IEEE Standard 802.5 Commercial Building Wiring Standard, EIA/TIA-5682.1 CABLE SPECIFICATIONS CHAPTER REQUIREMENTS/SPECIFICATIONSAttenuation and Impedance 2.1.1 UTP Cable SpeciﬁcationsType 3 Media Filters Maximum Lobe LengthsMaximum Number of Stations Attenuation and Impedance 2.1.2 STP Cable SpeciﬁcationsMaximum Lobe Lengths Table 2-3. STP Cable SpeciﬁcationsMaximum Number of Stations Maximum Trunk LengthsTable 2-4. STP Maximum Lobe Lengths Table 2-5. STP Maximum Drive Distanceoptic cable length is 2 km The maximum allowable ﬁber2187.2 yards. However, IEEE 802.5 speciﬁcations allow for aTable 2-7. Single Mode Fiber Optic Cable Speciﬁcations 2.1.4 Single Mode Fiber Optic Cable SpeciﬁcationsFiber Optic Budget Maximum Trunk LengthsTemperature 2.2 CABLE RECOMMENDATIONS/TROUBLESHOOTINGFiber Optic Budget Crosstalk2.3 COM PORT SPECIFICATIONS Booting/Diagnostics 2.4 TPIM SPECIFICATIONSLocal Management SLIPTPIM-T4 TPIM-T2TPIM-F2 NOTE Transmitter power and receive sensitivity levels, shown inTPIM-F3 REQUIREMENTS/SPECIFICATIONSTPIM-F2 Speciﬁcations ParameterTable 2-9. TPIM-F3 Speciﬁcations When measuring power levels with an Average Power Meter, add 3 dBm2.5.1 Power Supply Requirements 2.5 GENERAL SPECIFICATIONS2.5.2 Environmental Requirements Service 2.5.3 Safety2.5.4 Physical 2.5.53.1 UNPACKING THE MicroMMAC-T CHAPTER INSTALLATION3.2 ATTACHING THE STRAIN RELIEF BRACKET 3.3.1 Rack-Mounting the MicroMMAC-T 3.3 INSTALLING THE MicroMMAC-TINSTALLATION Figure 3-2. Installing of Rack-Mount Brackets 3.3.2 Wall-Mounting the MicroMMAC-TFigure 3-3. Installing the MicroMMAC-T in a 19-inch Rack Molly Screw Anchors Molly Screws Bracket Screws Wall Mounting Bracket Figure 3-4. Wall-Mounting the MicroMMAC-T3.4 CONNECTING TO A POWER SOURCE 3.3.3 Free-Standing Installation3.5 RESETTING THE MICROMMAC-T Figure 3-5. Free-Standing InstallationTo reset the MicroMMAC-T 3.6 SETTING THE RING SPEEDTo change the ring speed To restore MicroMMAC-T parameters to the factory defaults 3.7 SETTING THE NVRAM SWITCHNOTE Clearing and resetting NVAM does not reset the date and time 3.8 CONNECTING LOBE PORT CABLINGRJ45 Plug INSTALLATIONat TCU at device portFigure 3-10. UTP Conﬁguration Example INSTALLATION3-10 Lobe CableTo attach a lobe segment to a MicroMMAC-T network port INSTALLATIONFigure 3-11. STP Conﬁguration Example Figure 3-12. MicroMMAC-T Network Ports3.9 INSTALLING TPIM MODULES Table 3-1. Pinout Cross-Reference for TPIMs Cont 3.9.1 Setting Phantom and RI/RO SwitchesTo install a TPIM, perform the following steps 3.9.2 TPIM InstallationCAUTION Observe all static precautions while handling TPIMs To connect a TPIM-T1 to a Twisted Pair Segment 3.9.3 Connecting STP SegmentsTo connect a segment to a TPIM-T2/-T4 3.9.4 Connecting Twisted Pair SegmentsFigure 3-16. The TPIM-T2/-T4 3.9.5 Connecting Fiber Optic Link SegmentsFigure 3-17. The TPIM-F2/-F3 To connect a ﬁber optic link segment to the TPIM-F2 /-F3To check MicroMMAC-T installation 3.10 CHECKING THE INSTALLATION4.1 MANAGEMENT TERMINAL REQUIREMENTS CHAPTER LOCAL MANAGEMENTUse Local Management to Do the Following 4.1.1 Attaching the Management Terminal 4.1.2 Management Terminal Setup ParametersTo attach a management terminal to the MicroMMAC-T Table 4-1. Terminal Settings for LM Terminal 4.1.3 Modem Cable Conﬁguration and SetupTo access Local Management 4.2 ACCESSING LOCAL MANAGEMENTFigure 4-3. MicroMMAC-T Local Management Screen 4.2.1 Accessing Local Management via Telnet4.3 USING LOCAL MANAGEMENT 4.2.2 Accessing Local Management from a ModemSETUP MENU Screen MAIN MENU ScreenSetting or Modifying Local Management Screen Fields 4.3.1 Working with Local Management ScreensSETUP MENU STATUS MENU DEVICE STATISTICS MIB NAVIGATOR EXIT SETUP MENUExiting Your Local Management Session Exiting a Local Management ScreenSetting the System Date 4.3.2 The SYSTEM LEVEL ScreenSetting the Host IP Address Setting the System TimeTo modify the Subnet Mask Modifying the Subnet MaskTo set the Default Gateway Setting the Default GatewaySetting Automatic Beacon Recovery Process ABRP Fields NOTE ARBP is supported only by Cabletron productsTo set the Beacon Recovery ﬁeld Setting COM 1 and COM 2 Applications 4.3.3 The SNMP COMMUNITY NAMES ScreenTo set the Number of Retries ﬁeld To set the Retry Interval ﬁeldRead-Write The user can view all LM ﬁelds and can edit all but the Access Policy 4.3.4 The SNMP TRAPS ScreenCommunity Name Editing the Community Name ﬁeldSetting SNMP Traps Enable TrapsTrap Destination Trap Community Name4.3.5 The RING SECURITY Screen You can select from two modes of ring security Alarm Only STATION ADDRESS Security ModeStn Edit NOTE The NMS receives each station added trap once onlySAVE/EXECUTE Changing the Security ModeNEXTSCREEN PREVIOUSSCREENAdding Stations to the STATION ADDRESS Allowed List Viewing the Revised Allowed ListDeleting Stations from the STATION ADDRESS Allowed List NOTE You cannot delete the Micro-MMAC-T address from the listDEVICE STATISTICS 4.3.6 The DEVICE STATISTICS ScreenUsing the ACCUMULATIVE Counter Mode Selecting the Device Statistics Counter ModeSetting the Refresh Field Frames ReceivedISOLATING ERRORS Errors ReceivedLine Errors Burst ErrorsAbort Transmit Errors AC ErrorsInternal Errors RING INFORMATIONNON-ISOLATING ERRORS Ports EnabledLost Frame Errors Ring NumberFrame Copied Errors 4.3.7 The CHASSIS STATUS VIEW ScreenRcvr Congestion Errors Token ErrorsPort Status ModeVirtual Flexible Network Bus VFNB ENABLE ALL PORTS ADMINISTRATIVE mode only Screen Mode StatusNEXT PREVIOUSUsing the OPERATIONAL Mode Screen Setting the REFRESH FieldReturn key To display the status of RI/RO ports, BRIMs, or the MicroSNAC device To display the status of portsTo enable and disable select ports Using the ADMINISTRATIVE Mode ScreenUsing the RING OUT ENABLE Mode Screen To enable all ports for all modulesTo bypass all ports on a module To reconnect a module to the token ringTo switch to and from STN and RO 4.3.8 The COMPONENT STATUS ScreenFigure 4-13. COMPONENT STATUS VIEW Screen 4.3.9 The MIB NAVIGATOR ScreenTo get help on speciﬁc commands To access a list of MIB commandsTo escape from the MIB NAVIGATOR screen bran next Built-In commandstree whoamiping 4.3.10 The FLASH DOWNLOAD Screensnmp branch snmpgetTo chose the RUNTIME method Download Method ﬁeld2. Toggle from RUNTIME to BOOTPROM using the spacebar To choose the BOOTPROM methodFlash Image Server IP Flash Image File Name5.1 USING LANVIEW LEDs CHAPTER TROUBLESHOOTING5.2 USING THE LCD DISPLAY Table 5-2. Static System Messages 5.2.1 Static System MessagesTROUBLESHOOTING 5.2.2 Alarm MessagesTable 5-3. Alarm Messages DisplayedTable 5-3. Alarm Messages Cont 5.2.3 Unsaved Initialization MessagesTable 5-4. Unsaved Failure or Error Messages Table 5-5. Normal Unsaved Initialization Messages 5.2.4 Saved System MessagesTable 5-6. Saved System Messages NOTE The LCD displays the following message whenever the POWER 5.3 VIEWING POWER UP DIAGNOSTIC TESTSResponding to Error Messages To return to Local Management To execute a response optionGERMAN POWER SUPPLY CORDSPANISH FRENCH