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Cabletron Systems 42T, MICROMMAC-22T Chapter Requirements/Specifications, Cable Specifications

Models: 42T MICROMMAC MICROMMAC-22T

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CHAPTER 2

CHAPTER 2

REQUIREMENTS/SPECIFICATIONS

Read this chapter prior to installing the MicroMMAC-T. It contains operating speciﬁcations and requirements for power and cabling. To obtain satisfactory performance from this equipment, networks must meet the requirements and conditions speciﬁed in this chapter. Failure to follow these guidelines may result in poor network performance.

2.1 CABLE SPECIFICATIONS

Token Ring architecture provides for a set of Trunk Coupling Units (TCUs) connected by trunk cabling. To extend the trunk cabling, install TPIMs into the MicroMMAC-T’s RI/RO ports. TPIMs have embedded repeaters and provide trunk connections for UTP, STP, Multimode Fiber, and Single Mode Fiber cabling.

Attach stations to the TCU lobe ports with lobe cabling. Figure 2-1 shows a typical ports to cables conﬁguration.

Ring Out TPIM
MicroMMAC-24T TOKEN RING HUB	LANVIEW®
			24	23	22	21	20	19	18	17	16	15	14	13
CPU		ACT
16 Mb/s		MGMT
COM 2 COM 1		RO	12	11	10	9	8	7	6	5	4	3	2	1		RI
		RO														RI
Lobe Cabling											TCU Lobe Ports
Lobe Cabling
Token Ring Station																Trunk Cabling
Token Ring Station
		Ring In TPIM
MicroMMAC-24T TOKEN RING HUB		LANVIEW®
			24	23	22	21	20	19	18	17	16	15	14		13
CPU		ACT
16 Mb/s		MGMT
COM 2 COM 1		RO	12	11	10	9	8	7	6	5	4	3	2		1	RI
		RO														RI

Figure 2-1. MicroMMAC-T Ports/Cables

2-1

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Cabletron Systems 42T, MICROMMAC-22T manual Chapter Requirements/Specifications, Cable Specifications

Contents

MICROMMAC-22T/24T/42T/44T STACKABLE TOKEN RING INTELLIGENT HUBS USER’S GUIDECopyright March 1996 by Cabletron Systems, Inc VCCI NOTICE FCC NOTICEDOC NOTICE CABLETRON SOFTWARE PROGRAM LICENSE EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITYCABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT UNITED STATES GOVERNMENT RESTRICTED RIGHTS CONTENTS CHAPTER 2 REQUIREMENTS/SPECIFICATIONSCHAPTER 3 INSTALLATION CHAPTER 1 INTRODUCTIONCHAPTER 5 TROUBLESHOOTING CHAPTER 4 LOCAL MANAGEMENT5.2.4 Saved System Messages 5.3 VIEWING POWER UP DIAGNOSTIC TESTS CONTENTS1.1 CONTENTS OVERVIEW CHAPTER INTRODUCTIONDISPLAY RESET Figure 1-1. The MicroMMAC-T1.2 MicroMMAC-T OVERVIEW INTRODUCTIONFigure 1-2. Typical MicroMMAC-T Conﬁguration Scenario 1.3 MicroMMAC-T FEATURESTelnet Cable Signal Polarity Speed Fault ProtectionActive TCU Ports Local ManagementRing Speed Switch Flash EEPROMLANVIEW LEDs Cabletron’s Distributed LAN Monitor ModeReset Button COM Port ApplicationsLCD and LCD Display Button MIB SupportRMON MIB Support 1.4 STACKABLE CAPABILITIES Table 1-2. RMON MIB RFC 1271/1513 Support Cont1.5 BRIDGING/ROUTING CAPABILITIES Figure 1-3. Typical Stackable Conﬁguration1.7 TELNET CAPABILITIES 1.5.1 SNA/WAN Integration1.6 REMOTE MANAGEMENT CAPABILITIES 1.8 RECOMMENDED READING 1.9 GETTING HELPLocal Area Networks, Token Ring Access Method, IEEE Standard 802.5 Commercial Building Wiring Standard, EIA/TIA-568CHAPTER REQUIREMENTS/SPECIFICATIONS 2.1 CABLE SPECIFICATIONS2.1.1 UTP Cable Speciﬁcations Attenuation and ImpedanceMaximum Number of Stations Maximum Lobe LengthsType 3 Media Filters 2.1.2 STP Cable Speciﬁcations Attenuation and ImpedanceMaximum Lobe Lengths Table 2-3. STP Cable SpeciﬁcationsMaximum Trunk Lengths Maximum Number of StationsTable 2-4. STP Maximum Lobe Lengths Table 2-5. STP Maximum Drive DistanceThe maximum allowable ﬁber optic cable length is 2 km2187.2 yards. However, IEEE 802.5 speciﬁcations allow for a2.1.4 Single Mode Fiber Optic Cable Speciﬁcations Fiber Optic BudgetMaximum Trunk Lengths Attenuation2.2 CABLE RECOMMENDATIONS/TROUBLESHOOTING Fiber Optic BudgetCrosstalk Noise2.3 COM PORT SPECIFICATIONS 2.4 TPIM SPECIFICATIONS Booting/DiagnosticsLocal Management SLIPTPIM-T2 TPIM-T4NOTE Transmitter power and receive sensitivity levels, shown in TPIM-F2REQUIREMENTS/SPECIFICATIONS TPIM-F3TPIM-F2 Speciﬁcations ParameterWhen measuring power levels with an Average Power Meter, add 3 dBm Table 2-9. TPIM-F3 Speciﬁcations2.5.2 Environmental Requirements 2.5 GENERAL SPECIFICATIONS2.5.1 Power Supply Requirements 2.5.3 Safety Service2.5.4 Physical 2.5.53.2 ATTACHING THE STRAIN RELIEF BRACKET CHAPTER INSTALLATION3.1 UNPACKING THE MicroMMAC-T INSTALLATION 3.3 INSTALLING THE MicroMMAC-T3.3.1 Rack-Mounting the MicroMMAC-T Figure 3-3. Installing the MicroMMAC-T in a 19-inch Rack 3.3.2 Wall-Mounting the MicroMMAC-TFigure 3-2. Installing of Rack-Mount Brackets Figure 3-4. Wall-Mounting the MicroMMAC-T Molly Screw Anchors Molly Screws Bracket Screws Wall Mounting Bracket3.3.3 Free-Standing Installation 3.4 CONNECTING TO A POWER SOURCE3.5 RESETTING THE MICROMMAC-T Figure 3-5. Free-Standing InstallationTo change the ring speed 3.6 SETTING THE RING SPEEDTo reset the MicroMMAC-T 3.7 SETTING THE NVRAM SWITCH To restore MicroMMAC-T parameters to the factory defaults3.8 CONNECTING LOBE PORT CABLING NOTE Clearing and resetting NVAM does not reset the date and timeINSTALLATION RJ45 Plugat TCU at device portINSTALLATION Figure 3-10. UTP Conﬁguration Example3-10 Lobe CableINSTALLATION To attach a lobe segment to a MicroMMAC-T network portFigure 3-11. STP Conﬁguration Example Figure 3-12. MicroMMAC-T Network Ports3.9 INSTALLING TPIM MODULES 3.9.1 Setting Phantom and RI/RO Switches Table 3-1. Pinout Cross-Reference for TPIMs ContCAUTION Observe all static precautions while handling TPIMs 3.9.2 TPIM InstallationTo install a TPIM, perform the following steps 3.9.3 Connecting STP Segments To connect a TPIM-T1 to a Twisted Pair Segment3.9.4 Connecting Twisted Pair Segments To connect a segment to a TPIM-T2/-T43.9.5 Connecting Fiber Optic Link Segments Figure 3-16. The TPIM-T2/-T4To connect a ﬁber optic link segment to the TPIM-F2 /-F3 Figure 3-17. The TPIM-F2/-F33.10 CHECKING THE INSTALLATION To check MicroMMAC-T installationUse Local Management to Do the Following CHAPTER LOCAL MANAGEMENT4.1 MANAGEMENT TERMINAL REQUIREMENTS To attach a management terminal to the MicroMMAC-T 4.1.2 Management Terminal Setup Parameters4.1.1 Attaching the Management Terminal 4.1.3 Modem Cable Conﬁguration and Setup Table 4-1. Terminal Settings for LM Terminal4.2 ACCESSING LOCAL MANAGEMENT To access Local Management4.2.1 Accessing Local Management via Telnet Figure 4-3. MicroMMAC-T Local Management Screen4.2.2 Accessing Local Management from a Modem 4.3 USING LOCAL MANAGEMENTSETUP MENU Screen MAIN MENU Screen4.3.1 Working with Local Management Screens Setting or Modifying Local Management Screen FieldsSETUP MENU STATUS MENU DEVICE STATISTICS MIB NAVIGATOR EXIT SETUP MENUExiting a Local Management Screen Exiting Your Local Management Session4.3.2 The SYSTEM LEVEL Screen Setting the System DateSetting the System Time Setting the Host IP AddressModifying the Subnet Mask To modify the Subnet MaskSetting the Default Gateway To set the Default GatewaySetting Automatic Beacon Recovery Process ABRP Fields NOTE ARBP is supported only by Cabletron productsTo set the Beacon Recovery ﬁeld 4.3.3 The SNMP COMMUNITY NAMES Screen Setting COM 1 and COM 2 ApplicationsTo 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 4.3.4 The SNMP TRAPS Screen Access PolicyCommunity Name Editing the Community Name ﬁeldEnable Traps Setting SNMP TrapsTrap Destination Trap Community Name4.3.5 The RING SECURITY Screen You can select from two modes of ring security Alarm Only STATION ADDRESS Stn EditSecurity Mode NOTE The NMS receives each station added trap once onlySAVE/EXECUTE NEXTSCREENPREVIOUSSCREEN RETURNViewing the Revised Allowed List Adding Stations to the STATION ADDRESS Allowed ListDeleting Stations from the STATION ADDRESS Allowed List NOTE You cannot delete the Micro-MMAC-T address from the list4.3.6 The DEVICE STATISTICS Screen DEVICE STATISTICSUsing the ACCUMULATIVE Counter Mode Setting the Refresh FieldSelecting the Device Statistics Counter Mode Frames ReceivedErrors Received ISOLATING ERRORSLine Errors Burst ErrorsAC Errors Abort Transmit ErrorsInternal Errors RING INFORMATIONPorts Enabled NON-ISOLATING ERRORSLost Frame Errors Ring Number4.3.7 The CHASSIS STATUS VIEW Screen Frame Copied ErrorsRcvr Congestion Errors Token ErrorsVirtual Flexible Network Bus VFNB ModePort Status ENABLE ALL PORTS ADMINISTRATIVE mode only Screen Mode StatusNEXT PREVIOUSReturn key Setting the REFRESH FieldUsing the OPERATIONAL Mode Screen To display the status of ports To display the status of RI/RO ports, BRIMs, or the MicroSNAC deviceUsing the ADMINISTRATIVE Mode Screen To enable and disable select portsTo enable all ports for all modules Using the RING OUT ENABLE Mode ScreenTo bypass all ports on a module To reconnect a module to the token ring4.3.8 The COMPONENT STATUS Screen To switch to and from STN and RO4.3.9 The MIB NAVIGATOR Screen Figure 4-13. COMPONENT STATUS VIEW ScreenTo escape from the MIB NAVIGATOR screen To access a list of MIB commandsTo get help on speciﬁc commands bran Built-In commands nexttree whoami4.3.10 The FLASH DOWNLOAD Screen pingsnmp branch snmpgetDownload Method ﬁeld To chose the RUNTIME methodTo choose the BOOTPROM method 2. Toggle from RUNTIME to BOOTPROM using the spacebarFlash Image Server IP Flash Image File NameCHAPTER TROUBLESHOOTING 5.1 USING LANVIEW LEDs5.2 USING THE LCD DISPLAY 5.2.1 Static System Messages Table 5-2. Static System Messages5.2.2 Alarm Messages TROUBLESHOOTINGTable 5-3. Alarm Messages DisplayedTable 5-4. Unsaved Failure or Error Messages 5.2.3 Unsaved Initialization MessagesTable 5-3. Alarm Messages Cont Table 5-6. Saved System Messages 5.2.4 Saved System MessagesTable 5-5. Normal Unsaved Initialization Messages Responding to Error Messages 5.3 VIEWING POWER UP DIAGNOSTIC TESTSNOTE The LCD displays the following message whenever the POWER To execute a response option To return to Local ManagementPOWER SUPPLY CORD GERMANSPANISH FRENCH