Manuals / Cabletron Systems / Computer Equipment / Switch

Cabletron Systems STHI Requirements & Speciﬁcations, General Networking Considerations, Chapter

Models: STHI

1 77

Download 77 pages 20.09 Kb

Page 19

CHAPTER 2

Requirements & Speciﬁcations

This chapter describes network guidelines, power requirements, and operating specifications for the STHI. Before performing the installation, read this chapter and confirm that the network meets the requirements and conditions specified herein. Failure to follow these guidelines may result in poor network performance.

Refer to Appendix A, TPIM Specifications, for TPIM specifications.

Refer to Appendix B, Media Specifications, for cable specifications.

2.1 General Networking Considerations

Take care in planning and preparing the cabling and connections for the network. The susceptibility of the LAN’s cables to crosstalk and noise determines the network’s error rate, and thus, the efficiency of data propagation on the network. The quality of the connections, the length of cables and other conditions of the installation are critical factors in determining the quality of the network.

All devices connected to the STHI must meet IEEE 802.5 Token Ring specifications.

Maximum Number of Stations on a Ring

1

The maximum stack composed of four 24-port STH hubs and one 24-port STHI offers a total of 120 TCU ports, but the number of ports available on the LAN may be increased by the use of passive Multi-Station Access Units (see to Section 1.2.6, Support for Passive MAU Workgroups) and TPIM Ring In / Ring Out connections to other devices (see Section 1.2.3, RI & RO Ports).

While there is no recommended limit to the number of TCU ports to be made available in a stack, the recommended maximum number of stations to be inserted simultaneously into a single ring is 255 when using STP lobe cabling and 150 when using UTP cabling anywhere on the ring. If the ring has been extended through RI/RO connections, consider the number of ports on ring extensions as well as those in the stack itself.

Page 2-1

Image 19

Cabletron Systems STHI manual Requirements & Speciﬁcations, General Networking Considerations, Chapter

Contents

CABLETRON SYSTEMS, P. O. Box 5005 Rochester, NH STHI INTELLIGENT TOKEN RING STACKABLE HUB USER’S GUIDECopyright May, 1995 by Cabletron Systems, Inc PROGRAM LICENSE AGREEMENT FCC NOTICEDOC NOTICE CABLETRON SYSTEMS, INCCABLETRON SOFTWARE PROGRAM LICENSE EXCLUSION OF WARRANTYAND DISCLAIMER OF LIABILITY RESTRICTED RIGHTS UNITED STATES GOVERNMENT2.1 General Networking Considerations 2.2 Operating Specifications CHAPTER 5 Local Management CHAPTER 4 TroubleshootingAppendix A TPIM Specifications Appendix B Media Specifications 1.2 STHI Overview 1.1 Contents of This ManualIntroduction CHAPTER1.2.1 LANVIEW LEDs STHI Overview1.2.2 TCU Ports Lobe Port and Multiple Ring Out Port ConfigurationsRing Speed Fault Protection STHI OverviewActive Circuitry Daughter Board Upgrade KitConnector STHI Overview1.2.6 Support for Passive MAU Workgroups 1.2.5 Automatic Beacon Recovery ProcessSTHI Overview 1.2.4 Hub-By-Hub Bypass Control1.2.8 IP Address Discovery STHI OverviewImproved Protection from Beaconing 1.2.7 Flash DownloadsMulti-Station DAISY-CHAIN MAU CONFIGURATIONRING OUT TCU MAU CONFIGURATION Access Units1.2.9 Local Management 1.3 Related Manuals1.4 Getting Help Related ManualsGetting Help Login anonymousPassword your email address Postal ServiceMaximum Number of Stations on a Ring Requirements & Speciﬁcations2.1 General Networking Considerations CHAPTERNoise Installation RecommendationsGeneral Networking Considerations Crosstalk2.2.2 TCU and COM Ports 2.2 Operating SpecificationsOperating Specifications 2.2.1 Hubstack Interconnect CablesFigure 2-2. RJ45 to DB25 Connector Pinout Operating SpecificationsCabletron Enterprise MIBs Operating Specifications2.2.3 Supported MIB Groups Standard MIBsHubs that are bypassed from the stack’s common ring must Operating Specifications2.2.6 Safety 2.2.5 Ring Sequence2.2.8 Environmental Requirements Operating Specifications2.2.9 Physical Specifications 2.2.7 Computing HardwareThe package includes a 3-1/2” floppy disk containing a Installation3.1 Installing the STHI CHAPTER3.1.4 Rack-Mounting the STHI Installing the STHI3.1.2 Stacking the STHI 3.1.3 Attaching the Strain Relief Bracket3.1.5 Wall-Mounting the STHI Installing the STHIFigure 3-4. Installing the Wall-Mounting Brackets Installing the STHIin the wall 3.1.6 Free-Standing Installations Installing the STHI3.1.7 Connecting the STHI to the Power Source 3.2 TPIM Installation3.3 Finishing the Installation TPIM Installation4.1 LANVIEW LED Signals TroubleshootingCHAPTER Failure to Link on Enabled Port 4.2 Trouble ResolutionTrouble Resolution Loss Of PowerSTHI-24 4.3 The Reset ButtonThe Reset Button Management services will be suspended during the reset processNVRAM Reset Switch 4.4 NVRAM Reset SwitchLocal Management 5.1 Accessing LMCHAPTER Menu Accessing LM5.1.1 Dumb Terminal Configuration Setting5.1.2 Console Cable Configuration Accessing LM5.1.3 Entering LM 5.2.1 Working with LM Screens 5.2 Using LM ScreensUsing LM Screens Invoking Menu Options or Screen CommandsExiting the Local Management Interface Session Using LM ScreensSetting or Modifying Fields 1. Use the Tab key or arrow keys to highlight fieldsSystem Level Using LM Screens5.2.2 Screen Hierarchy 5.2.3 Screen IntroductionsComponent Status Using LM ScreensSNMP Traps Chassis Status View5.3.1 System Date and System Time 5.3 The System Level ScreenOnly a user with Super-User access can change the device’s The System Level ScreenRetry Interval 5.3.4 Enable IP Address DiscoveryThe System Level Screen 5.3.3 Subnet MaskThe System Level Screen 5.3.5 Enable Beacon RecoveryNumber of Retries Retry Interval 5.4 The SNMP Community Names Screen5.3.7 Locally Administered Address The SNMP Community Names ScreenRead-only 5.4.2 Access PolicyThe SNMP Community Names Screen 5.4.1 Community NameThe SNMP Traps Screen 5.5 The SNMP Traps ScreenFigure 5-6. SNMP Traps Screen Functions of the Chassis Status View Screen 5.6 The Chassis Status View Screen5.6.1 The Screen Mode Screen Command The Chassis Status View ScreenThe Chassis Status View Screen 5.6.2 Multiplexer Configuration FieldsADMINISTRATIVE Mode 5.6.3 Port Configuration FieldsThe Chassis Status View Screen NEXT ADMINISTRATIVEThe Chassis Status View Screen Each port field whether TPIM or TCU may be set as followsFigure 5-9. Chassis Status View Screen in RING OUT ENABLE Mode RING OUT ENABLE ModeThe Chassis Status View Screen Each station TCU port may be listed as The Chassis Status View ScreenOPERATIONAL Mode Each Ring port TPIM port or Ring Out TCU may be listed as5.6.4 NEXT and PREVIOUS 5.7 The Component Status Screen5.6.5 ENABLE ALL PORTS The Component Status ScreenThe Device Statistics Screen 5.8 The Device Statistics ScreenDELTA The Device Statistics Screen5.8.1 Screen Mode TOTALKBytes Received Errors ReceivedThe Device Statistics Screen Frames ReceivedRing Number Ports EnabledThe Device Statistics Screen Ring StatusAbort Transmit Errors Line ErrorsBurst Errors AC ErrorsRcvr Congestion Errors Internal ErrorsLost Frame Errors Frame Copied ErrorsThe SNMP Tool Screen 5.9 The SNMP Tool ScreenToken Errors Frequency Errors5.9.3 GET The SNMP Tool Screen5.9.1 Community Name 5.9.2 OID Prepend5.9.4 GETNEXT The SNMP Tool Screen5.9.5 STEP 5.9.8 RECALL-OID The SNMP Tool Screen5.9.6 WALK 5.9.7 CYCLES5.9.11 Firmware Image Downloads ctDLForceOnBootThe SNMP Tool Screen 5.9.10 REPEATctDLTFTPRequest ctDLInitiateColdBootThe SNMP Tool Screen ctDLCommitRAMtoFlashA.2 Twisted Pair TPIM Pinouts TPIM SpeciﬁcationsAPPENDIX A A.1 OverviewFiber Optic TPIM Specifications A.3 Fiber Optic TPIM SpecificationsA.3.1 TPIM-F2 for Multimode Fiber Fiber Optic TPIM SpecificationsMinimum Fiber Optic TPIM SpecificationsParameter TypicalMinimum Fiber Optic TPIM SpecificationsParameter TypicalAPPENDIX B Media SpeciﬁcationsB.1 Unshielded Twisted Pair UTP Operating Unshielded Twisted Pair UTPShielded Twisted Pair STP B.2 Shielded Twisted Pair STPB.2.1 STP Cable Categories B.2.2 STP Lobe Lengths Shielded Twisted Pair STPB.2.3 Mixed STP Cable Types Single Mode and Multimode Fiber Optic Cabling B.3 Single Mode and Multimode Fiber Optic Cabling