Using Lanview LEDs, Lanview Leds | Cabletron Systems MICROMMAC, 42T

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 Using Lanview LEDs, Lanview Leds

Contents

Page Iii FCC Notice Cabletron SYSTEMS, INC. Program License Agreement United States Government Restricted Rights Contents Local Management Troubleshooting Saved System Messages Viewing Power UP Diagnostic Tests Chapter Introduction Contents Overview MicroMMAC-T Overview Telnet MicroMMAC-T Features Speed Fault Protection Cable Signal PolarityActive TCU Ports Local Management Cabletron’s Distributed LAN Monitor Mode Ring Speed SwitchFlash Eeprom Lanview LEDs COM Port Applications Reset ButtonLCD and LCD Display Button MIB Support Rmon MIB RFC 1271/1513 Support Rmon MIB SupportGroup Subgroup Section Stackable Capabilities Typical Stackable Conﬁguration BRIDGING/ROUTING Capabilities Remote Management Capabilities 1 SNA/WAN IntegrationTelnet Capabilities BRIMs Getting Help Recommended Reading MicroMMAC-T Ports/Cables Cable Specifications Attenuation and Impedance UTP Cable SpeciﬁcationsUTP Voice Grade and Category 3 Speciﬁcations Frequency Impedance Attenuation Type 3 Media Filters Maximum Lobe LengthsMaximum Number of Stations UTP Maximum Lobe Lengths STP Cable Speciﬁcations STP Cable SpeciﬁcationsTypes Frequency Impedance Attenuation STP Maximum Lobe Lengths Maximum Trunk LengthsSTP Cable Type Ring Speed Mbps STP Maximum Drive Distance Attenuation Mixed Cable TypesMultimode Fiber Optic Cable Speciﬁcations Cable Type Attenuation Maximum Drive Distance Single Mode Fiber Optic Cable Speciﬁcations Single Mode Fiber Optic Cable SpeciﬁcationsFiber Optic Budget Temperature Cable RECOMMENDATIONS/TROUBLESHOOTINGCrosstalk Noise COM 1/COM 2 Ports COM Port Specifications UPS Tpim SpecificationsSlip TPIM-T1 TPIM-T1 Pinouts TPIM-T2 TPIM-T4 Pinouts TPIM-F2 TPIM-F2 Speciﬁcations TPIM-F3Parameter Typical Worst Case Value Budget Parameter Typical Minimum Maximum REQUIREMENTS/SPECIFICATIONS Power Supply Requirements General SpecificationsOutput Min. Load Max. Load Max Power Environmental Requirements Service SafetyPhysical Attaching the Strain Relief Bracket Unpacking the MicroMMAC-T Rack-Mounting the MicroMMAC-T Installing the MicroMMAC-T Wall-Mounting the MicroMMAC-T Installing of Rack-Mount Brackets Wall-Mounting the MicroMMAC-T Connecting to a Power Source Free-Standing InstallationResetting the MICROMMAC-T To reset the MicroMMAC-T Setting the Ring SpeedTo change the ring speed To restore MicroMMAC-T parameters to the factory defaults Setting the Nvram Switch RJ45 Plug MIC Connector Connecting Lobe Port Cabling At TCU At device port RJ45 Plug 10. UTP Conﬁguration Example 11. STP Conﬁguration Example To attach a lobe segment to a MicroMMAC-T network port Signal RJ45 DB9 Ring-In Ring-Out Installing Tpim ModulesPinout Cross-Reference for TPIMs Setting Phantom and RI/RO Switches To install a TPIM, perform the following steps Tpim Installation To connect a TPIM-T1 to a Twisted Pair Segment Connecting STP Segments To connect a segment to a TPIM-T2/-T4 Connecting Twisted Pair Segments 16. The TPIM-T2/-T4 Connecting Fiber Optic Link Segments 17. The TPIM-F2/-F3 To connect a ﬁber optic link segment to the TPIM-F2 /-F3 To check MicroMMAC-T installation Checking the Installation Use Local Management to Do the Following Management Terminal Requirements Attaching the Management Terminal Management Terminal Setup ParametersTo attach a management terminal to the MicroMMAC-T Terminal Settings for LM Terminal Modem Cable Conﬁguration and SetupMenu Function Selection To access Local Management Accessing Local Management MicroMMAC-TLocal Management Screen Accessing Local Management via Telnet Using Local Management Accessing Local Management from a ModemSetup Menu Screen Main Menu Screen Working with Local Management Screens Setting or Modifying Local Management Screen FieldsSelecting a Menu Screen Option Exiting Your Local Management Session Exiting a Local Management Screen System Level Screen Setting the System Date Setting the Host IP Address Setting the System Time To modify the Subnet Mask Modifying the Subnet Mask To set the Default Gateway Setting the Default GatewaySetting Automatic Beacon Recovery Process Abrp Fields To set the Beacon Recovery ﬁeld Snmp Community Names Screen Setting COM 1 and COM 2 ApplicationsTo set the Number of Retries ﬁeld To set the Retry Interval ﬁeld Snmp Community Names Screen Snmp Traps Screen Access PolicyCommunity Name Editing the Community Name ﬁeld Setting Snmp Traps Enable TrapsTrap Destination Trap Community Name Ring Security Screen Ring Security Screen Station Address Security ModeStn Edit Nextscreen SAVE/EXECUTEPreviousscreen Return Adding Stations to the Station Address Allowed List Viewing the Revised Allowed ListDeleting Stations from the Station Address Allowed List Device Statistics Device Statistics Screen Using the Accumulative Counter Mode Selecting the Device Statistics Counter ModeSetting the Refresh Field Isolating Errors Errors Received Ring Information AC Errors Lost Frame Errors NON-ISOLATING Errors Chassis Status View Screen Frame Copied Errors Mode Next 10. Chassis Status View Operational Screen Using the Operational Mode Screen To display the status of ports To enable and disable select ports Using the Administrative Mode Screen Using 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 ring Component Status Screen To switch to and from STN and RO 13. Component Status View Screen MIB Navigator Screen To get help on speciﬁc commands To access a list of MIB commandsTo escape from the MIB Navigator screen MIB Commands Navigational commandsNavigation Built-In Special Set Built-In commands To download a Flash image Flash Download Screen To chose the Runtime method Download Method ﬁeld Toggle from Runtime to Bootprom using the spacebar To choose the Bootprom method Lanview Leds Using Lanview LEDs LCD Display Using the LCD Display Static System Messages Static System MessagesDisplayed Message Signiﬁcance Alarm Messages Alarm MessagesDisplayed Signiﬁcance Messages Unsaved Initialization Messages Unsaved Failure or Error Messages Normal Unsaved Initialization Messages Saved System MessagesSaved System Messages Displayed Message Responding to Error Messages Viewing Power UP Diagnostic Tests To return to Local Management To execute a response option Power Supply Cord