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Cabletron Systems SEHI-22FL Sehi Overview, Sehi Features, Repeater Functionality, FLASH EEPROMs

Models: SEHI-22FL

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Chapter 2: SEHI Features and Options

2.1SEHI OVERVIEW

The SEHI-22FL is an intelligent repeating hub providing front panel ports for network connections and a rear panel HubSTACK Interconnect Bus port for stackable connections. The SEHI is designed to manage the Cabletron Systems SEH series of non-intelligent stackable hubs.

The SEHI-22FL provides twelve 10BASE-FL ST-type ﬁber optic ports and one EPIM (Ethernet Port Interface Module) port.

2.2SEHI FEATURES

This section provides detailed information about SEHI features and capabilities.

Repeater Functionality

The SEHI fully conforms to the IEEE 802.3 10BASE-FL speciﬁcations, and provides the ﬂexibility to connect networks using IEEE 802.3, Ethernet Version 1 or Version 2 equipment. The SEHI transmits retimed data packets, regenerates the preamble, extends fragments, and arbitrates collisions.

The SEHI automatically partitions problem segments, and reconnects repaired segments to the network. This feature minimizes the impact on network operation resulting from a problem on one segment by isolating the problem segment. Only devices on the problem segment are affected. When the problem is solved, the SEHI automatically reconnects the isolated segment to the network.

FLASH EEPROMs

The SEHI uses FLASH EEPROMs that allow the downloading of new and updated ﬁrmware using Cabletron Systems SPECTRUM Element Manager/Windows or any device using BOOTP or TFTP protocols.

LANVIEW LEDs

Cabletron Systems LANVIEW Status Monitoring and Diagnostics System is a troubleshooting tool that helps in diagnosing power failures, collisions, cable faults, and link problems. The LANVIEW LEDs are conveniently located on the SEHI front panel.

2-2	SEHI User’s Guide

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Cabletron Systems SEHI-22FL manual Sehi Overview, Sehi Features, Repeater Functionality, FLASH EEPROMs, LANVIEW LEDs

Contents

SEHI-22FL INTELLIGENT STACKABLE HUB USER’S GUIDE SEHI User’s Guide DOC NOTICE FCC NOTICEVCCI NOTICE SEHI User’s GuideCABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITYCABLETRON SOFTWARE PROGRAM LICENSE SEHI User’s GuideSEHI User’s Guide UNITED STATES GOVERNMENT RESTRICTED RIGHTSCHAPTER 2 SEHI FEATURES AND OPTIONS CONTENTSCHAPTER 3 INSTALLATION REQUIREMENTS AND SPECIFICATIONSINSTALLATION ContentsCHAPTER 5 CONNECTING TO THE NETWORK TROUBLESHOOTINGAPPENDIX B IMAGE FILE DOWNLOAD USING OIDs ContentsAPPENDIX A EPIM INFORMATIONCHAPTER INTRODUCTION 1.1 USING THIS MANUAL1.2 DOCUMENT CONVENTIONS 1.4 RELATED MANUALS 1.3 GETTING HELPanonymous your email addressRESET Button CHAPTER SEHI FEATURES AND OPTIONSPower Supply ON/OFF Switch2.1 SEHI OVERVIEW 2.2 SEHI FEATURESRepeater Functionality FLASH EEPROMs2.4 REMOTE NETWORK MANAGEMENT CAPABILITIES 2.3 STACKABLE CAPABILITIESEthernet Port Interface Modules EPIMs 2.5 OPTIONAL FEATURESHubSTACK Interconnect Cables Rack Mount Hardware3.1 CABLE SPECIFICATIONS CHAPTER INSTALLATION REQUIREMENTS AND SPECIFICATIONS3.1.2 10BASE-FL Fiber Optic Network Requirements 3.1.1 HubSTACK Interconnect Cable RequirementsFiber Optic Budget and Propagation Delay AttenuationDelay 3.1.3 10BASE-T UTP and STP Cable SpeciﬁcationsLength Insertion Loss3.2 NETWORK PORT SPECIFICATIONS 3.4 TRANSCEIVER REQUIREMENTS 3.3 COM PORT REQUIREMENTSDelay Time Start of Packets Speciﬁcations 3.5 OPERATING SPECIFICATIONSDelay Times JAM Speciﬁcations System Speciﬁcations3.6 POWER SUPPLY REQUIREMENTS 3.9 PHYSICAL SPECIFICATIONS 3.8.1 Safety3.7 ENVIRONMENTAL REQUIREMENTS 3.8 AGENCY APPROVALS4.1 UNPACKING THE SEHI CHAPTER INSTALLATION4.3 INSTALLING THE SEHI 4.2 PRE-INSTALLATION TESTChapter 4 Installation In order to allow for proper cooling, there must be a two-inch 4.3.1 Tabletop or Shelf Installationclearance on either side and the back of the unit 4.3.2 Rackmount Installation Rack Mounting the SEHI Figure 4-4 Installing the Rack Mounting BracketsChapter 4 Installation 4.3.3 Stacking the SEHIFigure 4-5 Installing the SEHI in the Rack The cooling fans at the rear panel of the SEHI must haveTo stack SEH non-intelligent hubs together, proceed as follows 4.4 CONNECTING THE SEHI TO THE POWER SOURCE 4.5 ADDING/REPLACING EPIMS 5.1 CONNECTING THE SEHI TO THE NETWORK CHAPTER CONNECTING TO THE NETWORK5.1.1 Connecting Network Ports Do not touch the ends of the ﬁber optic strands, and do not let Chapter 5 Connecting to the Networkthe ends come in contact with dust, dirt, or other contaminants 3. Attach the fiber labeled 2 to the applicable TX port, on the SEHI 5.1.2 Connecting a UTP Segment to an EPIM-T Connecting the SEHI to the Network 5.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3SEHI User’s Guide 3. Attach the fiber labeled 2 to the applicable TX port on the module SMA 905 Connectors F3 ST Connectors F1/F2 ST Connectors F1/F2 SMA 906 Connectors w Half Alignment SleevesConnecting the SEHI to the Network SEHI User’s Guide5.1.4 Connecting a Thin Coaxial Segment to an EPIM-C Connecting the SEHI to the Network 5.1.5 Connecting an AUI Cable to an EPIM-AEnsure that the Signal Quality Error SQE or “heartbeat” test function is disabled on the external transceiver connected tob. Check the cable for continuity ON Position 5.1.6 Connecting an AUI Cable to an EPIM-XToward Back of EPIM5.2 FINISHING THE INSTALLATION 6.1 INSTALLATION CHECKOUT CHAPTER TROUBLESHOOTING6.2 USING LANVIEW SEHI-22FL 6.3 USING THE RESET BUTTON 6.4 SETTING THE NVRAM SWITCH CHAPTER LOCAL MANAGEMENT Chapter 7 Local Management 7.1 LOCAL MANAGEMENT KEYBOARD CONVENTIONSSEHI User’s Guide Table 7-1 Keyboard Conventions7.2 MANAGEMENT TERMINAL SETUP Connect the console cable to the SEHI as follows Management Terminal Setup Parameters 7.3 ACCESSING LOCAL MANAGEMENT Figure 7-3 Feature Selection Screen 7.4 THE FEATURE SELECTION SCREENCOMMUNITY NAME 7.5 THE COMMUNITY NAME TABLE SCREENACCESS write access to Local Management. Super-UserEditing the Community Name Field 7.6 THE CONFIGURATION SCREEN The following sections explain each ﬁeld on the Conﬁguration screen Use the following steps to set the IP Address Using the Port Enable Override Setting the Default Gateway7.7 THE TRAP TABLE SCREEN Use the following steps to conﬁgure the Trap table 7.8 THE SNMP TOOLS SCREEN Allows the user to retrieve MIB objects using SNMP protocol Getting Individual OIDs Setting an OIDGetting the Next OID 5. Press ENTER. “DATA” appears Cycling Through OIDs 7.9 THE DEVICE STATISTICS SCREENExiting the SNMP Tools Screen The following sections describe Device Statistics screen ﬁelds This command lets the user enable the selected port To select a module or port Exiting the Device Statistics Screen Using the DISABLE PORT CommandAPPENDIX A EPIM INFORMATION A.1 EPIM SPECIFICATIONSA.1.1 EPIM-T Appendix A EPIM Information A.1.2 EPIM-F1 and EPIM-F2A.1.3 EPIM-F3 Connector Type A.1.4 EPIM-CGrounding Figure A-5 The EPIM-A and EPIM-X A.1.5 EPIM-A and EPIM-X AUI PortAPPENDIX B IMAGE FILE DOWNLOAD USING OIDs B.1 SETTING UP A UNIX WORKSTATION AS A TFTP SERVER B.2 STANDARD TFTP DOWNLOAD Table B-1 Standard TFTP Download Procedure Appendix B Image File Download Using OIDsSEHI User’s Guide StepNumerics INDEXSEHI User’s Guide Index-1Index-2 IndexSEHI User’s Guide GERMAN POWER SUPPLY CORDSPANISH FRENCH