Manuale d’uso / di manutenzione del prodotto SEHI-22FL del fabbricante Cabletron Systems
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SEHI-22FL INTELLIGENT ST A CKABLE HUB USER’ S GUIDE SEHI Book Page 1 Friday, April 19, 1996 10:46 AM.
SEHI User’ s Guide i NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes ha ve been made.
Notice ii SEHI User’ s Guide FCC NOTICE This device complies with P art 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this de vice must accept any interference receiv ed, including interference that may cause undesired operation.
Notice SEHI User’ s Guide iii CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT IMPORTANT: Before utilizing this product, carefully read this License Agreement.
Notice iv SEHI User’ s Guide UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product (a) was de veloped solely at pri vate expense; (b) contains “restricted computer software” submitted .
SEHI User’ s Guide v CONTENTS CHAPTER 1 INTRODUCTION 1.1 Using This Manual ....................................................................... 1-1 1.2 Document Conventions ............................................................... 1-2 1.3 Getting Help.
Contents vi SEHI User’ s Guide CHAPTER 4 INSTALLATION 4.1 Unpacking the SEHI ..................................................................... 4-1 4.2 Pre-installation Test ..................................................................... 4-2 4.
Contents SEHI User’ s Guide vii APPENDIX A EPIM INFORMATION A.1 EPIM Specifications..................................................................... A-1 A.1.1 EPIM-T ............................................................................ A-1 A.
SEHI User’ s Guide 1-1 CHAPTER 1 INTR ODUCTION W elcome to the Cabletron Systems SEHI-22FL Intelligent Stackable Hub User’s Guide . This manual pro vides installation instructions and reference information for the SEHI-22FL. 1.1 USING THIS MAN UAL Read through this manual to gain an understanding of the features and capabilities of the SEHI.
Chapter 1: Introduction 1-2 SEHI User’ s Guide Chapter 7, Local Management , describes ho w to use SEHI Local Management screens and the av ailable commands. Appendix A, EPIM Information , provides specifications, cabling information, and switch settings for the Ethernet Port Interface Modules.
Getting Help SEHI User’ s Guide 1-3 1.3 GETTING HELP If you need additional support related to this de vice, or if you hav e any questions, comments, or suggestions concerning this manual, contact Cabletron Systems T echnical Support: By phone (603) 332-9400 Monday – Friday; 8 A .
SEHI User’ s Guide 2-1 CHAPTER 2 SEHI FEATURES AND OPTIONS This chapter provides an o verview of the SEHI-22FL and contains sections detailing features and av ailable options.
Chapter 2: SEHI F eatures and Options 2-2 SEHI User’ s Guide 2.1 SEHI OVERVIEW The SEHI-22FL is an intelligent repeating hub providing front panel ports for network connections and a rear panel HubST A CK Interconnect Bus port for stackable connections.
Stackab le Capabilities SEHI User’ s Guide 2-3 RESET Button Resetting the hub with the front panel RESET button reboots the SEHI and initializes the processor . Local Management Manage the SEHI and attached segments through Local Management on the SEHI.
Chapter 2: SEHI F eatures and Options 2-4 SEHI User’ s Guide 2.5 OPTIONAL FEATURES The follo wing features are not included with the SEHI, b ut are purchased separately from Cabletron Systems. Ethernet P or t Interface Modules (EPIMs) EPIMs enable the expansion of the netw ork through a v ariety of media.
SEHI User’ s Guide 3-1 CHAPTER 3 INSTALLATION REQUIREMENTS AND SPECIFICATIONS This chapter describes cabling requirements, network guidelines, and operating specifications for the SEHI. The network must meet the requirements and conditions specified in this chapter to obtain satisfactory performance from this equipment.
Chapter 3: Installation Requirements and Specifications 3-2 SEHI User’ s Guide 3.1.1 HubST A CK Inter connect Cable Requirements Attach the SEHI to modules in the stack with the SEHI HubST ACK Interconnect cable av ailable only from Cabletron Systems.
Cable Specifications SEHI User’ s Guide 3-3 3.1.3 10B ASE-T UTP and STP Cable Specifications The de vices and 10B ASE-T T wisted Pair Segments connected to an SEHI EPIM-T module must meet the IEEE 802.3 10B ASE-T specifications sho wn belo w: Length The IEEE 802.
Chapter 3: Installation Requirements and Specifications 3-4 SEHI User’ s Guide Crosstalk Crosstalk is caused by signal coupling between the dif ferent cable pairs contained within a multi-pair cable bundle.
COM P or t Requirements SEHI User’ s Guide 3-5 3.3 COM P OR T REQUIREMENTS The RJ45 COM port supports access to a Local Management Console. The Console port supports a Digital Equipment Corporation, VT320 terminal or PC emulation of the VT320 terminal.
Chapter 3: Installation Requirements and Specifications 3-6 SEHI User’ s Guide 3.5 OPERATING SPECIFICATIONS The operating specifications for the SEHI are described in this section. Cabletron Systems reserves the right to change these specifications at an y time without notice.
P ower Supply Requirements SEHI User’ s Guide 3-7 JAM Output Specifications Collisions are propagated through the network using the J AM signal of an alternating pattern of 1’ s and 0’ s in accordance with 802.3 specifications for a repeater unit.
Chapter 3: Installation Requirements and Specifications 3-8 SEHI User’ s Guide 3.7 EN VIRONMENTAL REQUIREMENTS The en vironmental requirements for the SEHI are detailed in this section.
SEHI User’ s Guide 4-1 CHAPTER 4 INSTALLATION This chapter outlines the procedure for attaching the SEHI to the network as a stackable or standalone de vice. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications , before installing the SEHI.
Chapter 4: Installation 4-2 SEHI User’ s Guide 4.2 PRE-INSTALLATION T EST The SEHI is equipped with an NVRAM reset switch (Figure 4-1) located behind the grillwork on the side of the hub . Ensure that this switch is in the DOWN position by looking in through the grillw ork on the right side of the hub .
Installing the SEHI SEHI User’ s Guide 4-3 4.3.1 T abletop or Shelf Installation This section provides guidelines for installation on a tabletop or shelf.
Chapter 4: Installation 4-4 SEHI User’ s Guide 4.3.2 Rackmount Installation T o install the SEHI in a 19-inch rack, Cabletron Systems of fers an accessory kit that includes rackmount brackets, mounting scre ws, and a strain-relief bracket for cable management.
Installing the SEHI SEHI User’ s Guide 4-5 Rack Mounting the SEHI Refer to Figure 4-4 and proceed as follo ws to install the SEHI into a 19-inch rack. 1. Remove four cover screws (two from each side) located along the front edges of each side of the SEHI.
Chapter 4: Installation 4-6 SEHI User’ s Guide Figure 4-5 Installing the SEHI in the Rack If the installation requires stacking the SEHI, proceed to Section 4.3.3. Otherwise, continue by connecting po wer as described in Section 4.4. 4.3.3 Stacking the SEHI The rear panel of the SEHI has an Interconnect Bus Out Port (male connector).
Installing the SEHI SEHI User’ s Guide 4-7 T o stack the SEHI together with an SEH non-intelligent hub, proceed as follo ws: 1. Attach the SEHI HubSTACK Interconnect cable to the “OUT” port on the rear panel of the SEHI as shown in Figure 4-6. 2.
Chapter 4: Installation 4-8 SEHI User’ s Guide If one end of a HubST ACK Interconnect cable is disconnected without disconnecting the other end attached to the hub, disconnect the cable from the OUT port as sho wn in Figure 4-7 to ensure that the HubST ACK Interconnect cable is terminated properly .
Adding/Replacing EPIMs SEHI User’ s Guide 4-9 4.5 ADDING/REPLACING EPIMS This section contains procedures on ho w to add or replace an Ethernet Port Interface Module (EPIM) to upgrade or change the capabilities of your SEHI. After installing a new EPIM, refer to the appropriate EPIM section in Appendix A to verify proper operation.
SEHI User’ s Guide 5-1 CHAPTER 5 CONNECTING TO THE NETW ORK This chapter outlines the procedure for connecting the SEHI to a network. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications , before installing the SEHI.
Chapter 5: Connecting to the Network 5-2 SEHI User’ s Guide • Label the fiber optic cable to indicate which fiber is recei ve and which is transmit. Cabletron Systems fiber optic cable is labeled so that one fiber is labeled 1, and the other fiber is labeled 2 at both ends of the cable.
Connecting the SEHI to the Network SEHI User’ s Guide 5-3 3. Attach the fiber labeled 2 to the applicable TX port, on the SEHI. 4. At the other end of the fiber optic cable, attach the fiber labeled 1 to the transmit port of the device. 5. Attach the fiber labeled 2 to the receive port.
Chapter 5: Connecting to the Network 5-4 SEHI User’ s Guide 5.1.2 Connecting a UTP Segment to an EPIM-T Before connecting a segment to the EPIM-T , check each end of the segment to determine if the wires cross o ver for proper connection. If the wires do not cross ov er, use the switch on the EPIM-T to internally cross ov er the RJ45 port.
Connecting the SEHI to the Network SEHI User’ s Guide 5-5 If a link is not established, contact Cabletron Systems T echnical Support. 5.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3 When connec.
Chapter 5: Connecting to the Network 5-6 SEHI User’ s Guide Connect a fiber optic link segment to an EPIM-F1, EPIM-F2, or an EPIM-F3 as follo ws: 1. Remove the protective plastic covers from the fiber optic ports on the applicable port on the module and from the ends of the connectors on each fiber strand.
Connecting the SEHI to the Network SEHI User’ s Guide 5-7 Figure 5-3 The EPIM-F1, EPIM-F2, and EPIM-F3 SMA 905 Connectors SMA 906 Connectors w/ Half Alignment Sleeves ST Connectors ST Connectors F1/.
Chapter 5: Connecting to the Network 5-8 SEHI User’ s Guide 5.1.4 Connecting a Thin Coaxial Segment to an EPIM-C T o connect a thin coaxial segment to an EPIM-C: 1.
Connecting the SEHI to the Network SEHI User’ s Guide 5-9 Figure 5-4 The EPIM-C 5.1.5 Connecting an A UI Cable to an EPIM-A Connect an EPIM-A to an external netw ork segment as follo ws: 1. Attach an external transceiver to the network segment to be connected to the AUI port.
Chapter 5: Connecting to the Network 5-10 SEHI User’ s Guide Figure 5-5 The EPIM-A 5. Check that the PWR LED on the EPIM-A is on. If the LED is not on, contact Cabletron Systems Technical Support. 6. If the PWR LED is on with the AUI cable disconnected, continue with the following checks: a.
Connecting the SEHI to the Network SEHI User’ s Guide 5-11 5.1.6 Connecting an A UI Cable to an EPIM-X Perform the follo wing steps to connect an EPIM-X to a de vice not requiring SQE: 1. Check that the SQE LED on the EPIM-X is off. If the SQE LED is on, check the position of the SQE switch.
Chapter 5: Connecting to the Network 5-12 SEHI User’ s Guide 5.2 FINISHING THE INSTALLATION The SEHI is no w ready for operation. Before placing the network into service, test the installation thoroughly , making sure that all stations can be addressed and that the SEHI and all stations are indicating normal operation.
SEHI User’ s Guide 6-1 CHAPTER 6 T ROUB LESHOOTING This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems.
Chapter 6: T roubleshooting 6-2 SEHI User’ s Guide 2. If the remote station is ready and the LNK LED is on, but no data passes through the port, one of the following two conditions may exist: • Network management disabled the port.
Using LANVIEW SEHI User’ s Guide 6-3 Figure 6-1 LANVIEW LEDs PWR When this green LED is on, it indicates that the SEHI is recei ving po wer . If this LED is of f, it indicates a loss of input po wer . Check the input po wer source (circuit breaker , fuse, etc.
Chapter 6: T roubleshooting 6-4 SEHI User’ s Guide CLN This red LED indicates that a collision has occurred on one of the ports. RCV When a yello w RCV LED flashes, it indicates that the SEHI is recei ving data packets from the associated port se gment.
Setting the NVRAM Switch SEHI User’ s Guide 6-5 6.4 SETTING THE NVRAM SWITCH The SEHI uses NVRAM (Non-V olatile Random Access Memory) to store user-entered parameters such as IP address and Community Names. T o reset these parameters to the factory defaults, refer to Figure 6-2 and perform the follo wing steps: 1.
SEHI User’ s Guide 7-1 CHAPTER 7 LOCAL MANAGEMENT This chapter explains ho w to set up a management terminal to access the SEHI Local Management. It also explains ho w to use the Local Management screens and commands. Use Local Management to accomplish the follo wing tasks: • Assign an IP address and subnet mask.
Chapter 7: Local Management 7-2 SEHI User’ s Guide 7.1 LOCAL MANAGEMENT KE YBOARD CON VENTIONS All ke y names appear in this manual as capital letters. For e xample, the enter (return) ke y appears as ENTER and the space bar appears as SP A CE bar .
Management T erminal Setup SEHI User’ s Guide 7-3 7.2 MANAGEMENT T ERMINAL SETUP Use one of the follo wing systems to access Local Management: • A Digital Equipment Corporation VT series terminal .
Chapter 7: Local Management 7-4 SEHI User’ s Guide Console Cable Configuration Use the RJ45 Cable Kit provided with the SEHI-A CCY -KIT package to attach the management terminal to the SEHI COM port as sho wn in Figure 7-1. Connect the console cable to the SEHI as follo ws: 1.
Management T erminal Setup SEHI User’ s Guide 7-5 Management T erminal Setup Parameter s T able 7-2 lists the setup parameters for the local management terminal. If the terminal is a Digital Equipment Corporation VT320 terminal, press F3 to access the Setup Directory.
Chapter 7: Local Management 7-6 SEHI User’ s Guide 7.3 ACCESSING LOCAL MANAGEMENT After configuring the local management terminal and properly attaching the cables to the SEHI, access the Local Management interface. 1. Power up the terminal. The password screen (Figure 7-2) appears.
The Feature Selection Screen SEHI User’ s Guide 7-7 Figure 7-3 Feature Selection Screen 7.4 THE FEATURE SELECTION SCREEN The Feature Selection screen is the main menu screen for SEHI Local Management.
Chapter 7: Local Management 7-8 SEHI User’ s Guide 7.5 THE COMMUNITY NAME T ABLE SCREEN T o access the Community Name T able screen from the Feature Selection screen, use the arro w ke ys to highlight the Community Name Table option, then press ENTER or F6 .
The Community Name T able Screen SEHI User’ s Guide 7-9 A CCESS Indicates the access status accorded each community name. Possible conditions are as follo ws: B ASIC-READ This allo ws Read-Only access to Local Management, but e xcludes read privile ges to the Component T rap screen.
Chapter 7: Local Management 7-10 SEHI User’ s Guide 6. To exit the screen, press the appropriate Function key or use the arrow keys to highlight the RETURN command.
The Configuration Screen SEHI User’ s Guide 7-11 The follo wing sections explain each field on the Configuration screen. I/F The number of the interface corresponding to the channels o ver which packets with that IP Address pass. On the SEHI, this value is “1.
Chapter 7: Local Management 7-12 SEHI User’ s Guide Setting the IP Address Use the follo wing steps to set the IP Address: 1. Use the arrow keys to highlight the IP Address field. 2. Enter the IP address into this field. The format for this entry is XXX.
The Configuration Screen SEHI User’ s Guide 7-13 2. Enter the subnet mask into this field. The format for this entry is XXX.XXX.XXX.XXX with values for XXX being from 0 to 255. 3. Press ENTER . 4. Use the arrow keys to highlight the SAVE option, then press ENTER or F6 .
Chapter 7: Local Management 7-14 SEHI User’ s Guide Exiting the Configuration Screen Use the follo wing steps to exit the Configuration screen and return to the Feature Selection screen: 1. Press the appropriate Function key. To return to the Feature Selection screen, use the arrow keys to highlight the RETURN command.
The T rap T able Screen SEHI User’ s Guide 7-15 T raps Enables transmission of the traps to the network management station with the associated IP address. IP Address Indicates the IP address of the workstation recei ving trap alarms from the SEHI. Configuring the T rap T able Use the follo wing steps to configure the T rap table: 1.
Chapter 7: Local Management 7-16 SEHI User’ s Guide 7.8 THE SNMP T OOLS SCREEN This section describes ho w to use the SNMP T ools screen to access Management Information Bases (MIBs). Access to screen options depends on the access status accorded to the user’ s community name.
The SNMP T ools Screen SEHI User’ s Guide 7-17 OID PREPEND Specifies the number prefix common to all Object Identifiers (OIDs) found in the MIBs – 1.3.6.1 is the default prefix OID. This is a modifiable field. GET Allo ws the user to retrie ve MIB objects using SNMP protocol.
Chapter 7: Local Management 7-18 SEHI User’ s Guide Getting Individual OIDs Use the follo wing steps to “Get” indi vidual OIDs: 1. Highlight GET , using the arrow keys, then press ENTER or F6 .
The SNMP T ools Screen SEHI User’ s Guide 7-19 3. Press ENTER . If there is no instance of that OID, the return code will specify “MIB_NO_INSTANCE”, otherwise “DATA TYPE:” appears. 4. Enter the data type for that OID. Possible choices are integer, string, null, OID, IP address, counter, gauge, timeticks, and opaque.
Chapter 7: Local Management 7-20 SEHI User’ s Guide Cycling Thr ough OIDs Use the follo wing steps to “Cycle” through OIDs: 1. Use the arrow keys to Highlight CYCLES , then press ENTER . 2. Enter the number of cycles desired to occur after “ENTER CYCLE COUNT:”, then press ENTER .
The Device Statistics Screen SEHI User’ s Guide 7-21 The follo wing sections describe De vice Statistics screen fields: BYTES RECEIVED Displays the number of bytes recei ved. FRAMES RECEIVED Displays the number of frames recei ved. ERRORS RECEIVED Displays the number of errors recei ved.
Chapter 7: Local Management 7-22 SEHI User’ s Guide PORT ADMIN. ST A TUS Displays the administrati ve status of the port selected. The two possible status messages are Enable or Disable. PORT SEG. ST A TUS Displays the segmentation status of the port selected.
The Device Statistics Screen SEHI User’ s Guide 7-23 PORT This command lets the user vie w port statistics for ports 1-26 of the selected module. Selecting the Appropriate Module/P or t When the De vice Statistics screen first appears, statistics are displayed for Module 1 and Port 1.
Chapter 7: Local Management 7-24 SEHI User’ s Guide Using the DISABLE PORT Command The DISABLE POR T command lets the user disable the port selected in the PORT command. The user must first use the Port command to select the desired port. T o set the DISABLE POR T command: 1.
SEHI User’ s Guide A-1 APPENDIX A EPIM INF ORMATION A.1 EPIM SPECIFICATIONS EPIMs enable the connection of the SEHI to the main network using dif ferent media types. Cabletron Systems of fers a v ariety of EPIMs. The follo wing sections explain specifications for each EPIM.
Appendix A: EPIM Information A-2 SEHI User’ s Guide A.1.2 EPIM-F1 and EPIM-F2 The EPIM-F1 and EPIM-F2 sho wn in Figure A-2 support Multimode Fiber Optic cabling. Each EPIM has an internal Cabletron Systems FOT-F Fiber Optic Transceiver . The EPIM-F1 is equipped with SMA Connectors and the EPIM-F2 is equipped with ST Connectors.
EPIM Specifications SEHI User’ s Guide A-3 A.1.3 EPIM-F3 The EPIM-F3 (Figure A-3) supports Single Mode Fiber Optic cabling. It has an internal Cabletron Systems FOT-F Fiber Optic Transceiver and is equipped with ST Connectors. EPIM-F3 specifications are listed belo w .
Appendix A: EPIM Information A-4 SEHI User’ s Guide A.1.4 EPIM-C The EPIM-C supports thin coaxial cabling and is equipped with an internal Cabletron Systems TMS-3 Transceiver . Use the TERM switch on the front of the EPIM-C to set the internal 50-ohm terminator .
EPIM Specifications SEHI User’ s Guide A-5 A.1.5 EPIM-A and EPIM-X (A UI Port) The EPIM-A is a DB15 female connector used to attach segments to an external transcei ver . The EPIM-X is equipped with dual internal transcei vers. It has a DB15 male connector used to attach se gments to an A UI cable.
SEHI User’ s Guide B-1 APPENDIX B IMAGE FILE DOWNLOAD USING OIDs This appendix provides instructions for setting up a TFTP server and to do wnload an image file to the SEHI by setting specific MIB OID strings. Set the OID strings with the SNMP T ools screen described in Chapter 7, Section 7.
Appendix B: Image File Download Using OIDs B-2 SEHI User’ s Guide B.1 SETTING UP A UNIX W ORKSTATION AS A TFTP SERVER Due to v ariations between UNIX systems and indi vidual configurations, this section provides only GUIDELINES for configuring a UNIX workstation to perform an image file do wnload.
Standard TFTP Download SEHI User’ s Guide B-3 6. Store the hex image file in the /tftpboot directory as sehi.hex. 7. Edit the /etc/inetd.conf file by removing anything prior to the tftpboot daemon (e.g., the # sign) that comments-out the line. 8. Kill the inetd process (e.
Appendix B: Image File Download Using OIDs B-4 SEHI User’ s Guide • Enter the FULL path to the image file in the ctDL TFTPRequest OID, including the name of the image file (e.g., c:/tftpboot/sehi.hex). Table B-1 Standard TFTP Download Procedure Step OID Name OID Number Data T ype SNMP OID Data 1.
SEHI User’ s Guide Index-1 INDEX Numerics 10BASE-FL attenuation 3-2 budget and propagation delay 3-2 cable requirements 3-2 10BASE-T cable length 3-3 crosstalk 3-4 delay 3-3 impedance 3-3 insertion .
Index Index-2 SEHI User’ s Guide N Network connection 5-1 AUI 5-9, 5-11 EPIM-A 5-9 EPIM-C 5-8 EPIM-F1/F2/F3 5-5 EPIM-T 5-4 EPIM-X 5-11 fiber optic segment 5-5 thin coaxial 5-8 Unshielded Twisted Pai.
PO WER SUPPL Y CORD The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0.75 mm square conductors and must incorporate a standard IEC appliance coupler on one e.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Cabletron Systems SEHI-22FL è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Cabletron Systems SEHI-22FL - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cabletron Systems SEHI-22FL imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cabletron Systems SEHI-22FL ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cabletron Systems SEHI-22FL, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Cabletron Systems SEHI-22FL.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Cabletron Systems SEHI-22FL. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cabletron Systems SEHI-22FL insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
