SEHI100TX-22 100BASE-T INTELLIGENT STACKABLE HUB USER’S GUIDE ®
Only qualified personnel should perform installation procedures. 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 have been made. The hardware, firmware, or software described in this manual is subject to change without notice.
Notice DOC NOTICE This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.
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CONTENTS CHAPTER 1 INTRODUCTION 1.1 Using This Manual....................................................................... 1-1 1.2 Document Conventions ............................................................... 1-2 1.3 Getting Help................................................................................. 1-3 1.4 Related Manuals.......................................................................... 1-4 CHAPTER 2 SEHI FEATURES AND OPTIONS 2.1 SEHI Overview ....................................
Contents CHAPTER 5 CONNECTING TO THE NETWORK 5.1 Connecting the SEHI to the Network ...........................................5-1 5.1.1 Connecting to Network Ports...........................................5-1 5.1.2 Connecting to an EPIM-100TX........................................5-2 5.1.3 Connecting to an EPIM-100FX or EPIM-100FMB...........5-4 5.2 Testing the Installation .................................................................5-5 CHAPTER 6 TROUBLESHOOTING 6.1 Installation Test ...............
Contents 7.9 The Device Statistics Screen..................................................... 7-24 7.9.1 Selecting the Appropriate Module/Port ......................... 7-27 7.9.2 Using the ENABLE PORT Command ........................... 7-27 7.9.3 Using the DISABLE PORT Command .......................... 7-27 7.9.4 Setting the UPDATE-FREQency Field ......................... 7-28 7.9.5 Exiting the Device Statistics Screen ............................. 7-28 APPENDIX A EPIM SPECIFICATIONS A.
Contents viii SEHI100TX User’s Guide
CHAPTER 1 INTRODUCTION Welcome to the Cabletron Systems SEHI100TX-22 100BASE-T Intelligent Stackable Hub User’s Guide. This manual provides installation instructions, troubleshooting, and reference information for the SEHI100TX-22. NOTE 1.1 The term SEHI (Stackable Ethernet Hub with Intelligence) is used throughout this manual when describing the features and functions of the SEHI100TX-22. USING THIS MANUAL Read through this manual to gain an understanding of the features and capabilities of the SEHI.
Chapter 1: Introduction Chapter 7, Local Management, describes how to use SEHI Local Management screens and the available commands. Appendix A, EPIM Specifications, provides specifications, cabling information, and switch settings for the Ethernet Port Interface Modules. Appendix B, Image File Download Using OID Strings, provides instructions for setting up a TFTP server and downloading an image file to the SEHI by setting specific MIB OID strings. 1.
Getting Help 1.3 GETTING HELP If you need additional support related to this device, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support: Phone (603) 332-9400 Monday – Friday; 8 A.M. – 8 P.M. Eastern Time CompuServe GO CTRON from any ! prompt Internet mail support@ctron.com FTP Login Password ctron.com (134.141.197.
Chapter 1: Introduction 1.4 RELATED MANUALS Use the Cabletron Systems SEH100TX-22 100BASE-T User’s Guide to supplement the procedures and other technical data provided in this manual. The procedures contained in the SEH100TX-22 100BASE-T User’s Guide are referenced where appropriate, but not repeated in this manual.
CHAPTER 2 SEHI FEATURES AND OPTIONS This chapter provides an overview of the SEHI and contains sections detailing features and available options. The terms SEHI (Stackable Ethernet Hub with Intelligence) and SEH (Stackable Ethernet Hub) are used throughout this manual when describing the features and functions of the SEHI100TX-22 and the SEH100TX-22.
Chapter 2: SEHI Features and Options ! CAUTION The SEHI100TX-22 operates in a 100BASE-T Ethernet network. This product will NOT operate in a 10BASE-T environment. Connect the SEHI100TX-22 and SEH100TX-22 only to similar 100BASE-T products. The SEHI100TX-22 supports the EPIM-100TX, EPIM-100FX, and the EPIM-100FMB. No other Cabletron Systems EPIMs operate in this device. 2.2 SEHI FEATURES The SEHI operating features are as follows: Repeater Functionality The SEHI fully conforms to the IEEE 802.
Stackable Capabilities 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. RESET Button Resetting the hub with the front panel RESET Button reboots the SEHI and initializes the processor. Resetting the SEHI also resets all of the SEH non-intelligent hubs in the stack.
Chapter 2: SEHI Features and Options 2.4 RACK MOUNTING CAPABILITIES The SEHI can be installed in a 19-inch rack. Cabletron Systems provides brackets and mounting screws with the SEHI. See Chapter 4, Installation, for complete rack mounting instructions. 2.5 REMOTE NETWORK MANAGEMENT Manage the SEHI remotely with any SNMP network management system.
CHAPTER 3 INSTALLATION REQUIREMENTS AND SPECIFICATIONS This chapter describes cabling requirements, network guidelines, and operating specifications for the SEHI100TX-22. ! CAUTION 3.1 The network must meet the requirements and conditions specified in this chapter to obtain satisfactory performance from this equipment. Failure to follow these guidelines could result in poor network performance.
Chapter 3: Installation Requirements and Specifications 3.1.2 UTP Cable Specifications The device at the other end of the twisted pair segment must meet IEEE 802.3u 100BASE-T specifications. When connecting a 100BASE-TX Twisted Pair Segment to the SEHI twisted pair network ports and the EPIM-100TX module, the network must meet the following requirements: Length The IEEE 802.
Cable Specifications Propagation Delay Propagation delay is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the network is 256 bit times (2.56 µs) in one direction (5.12 µs round trip). If the total propagation delay between any two nodes on the network exceeds 2.56 µs, then use bridges or other devices to further segment the network. Temperature The attenuation of PVC insulated cable varies significantly with temperature.
Chapter 3: Installation Requirements and Specifications Propagation delay (collision delay) is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the entire network is 256 bit times (2.56 µs) in one direction (5.12 µs round trip). If the total propagation delay between any two nodes on the network exceeds 2.56 µs, then use bridges or other devices to further segment the network. 3.
Network Cable Lengths SEHI100TX-22 Repeater A B DTE DTE Figure 3-1 Class I Network Table 3-1 summarizes the maximum link lengths for each type and combination of cable when used with a Class I repeater. ! The maximum length of an individual UTP segment may be no more than 100 meters.
Chapter 3: Installation Requirements and Specifications 3.3 NETWORK PORT SPECIFICATIONS The SEHI network ports use shielded RJ45 connectors that support UTP cabling. Figure 3-2 shows the RJ45 pinouts. 12345678 9X 10X 11X 1. Receive + 2. Receive 3. Transmit + 4. Not Used 5. Not Used 6. Transmit 7. Not Used 8. Not Used 09162_02 Figure 3-2 3.4 RJ45 Network Port Pinouts COM PORT REQUIREMENTS The RJ45 COM port supports access to a Local Management Console.
Operating Specifications 3.5 OPERATING SPECIFICATIONS The operating specifications for the SEHI100TX-22 are described in this section. Cabletron Systems reserves the right to change these specifications at any time without notice. 3.5.1 Power Supply Requirements The SEHI uses a universal power supply. The input requirements are listed in Table 3-2. Table 3-2 Power Supply Requirements Line Input Range Volts (V) Current Amperes (A) 100–125 Vac 4.0 A 200–250 Vac 2.
Chapter 3: Installation Requirements and Specifications Immunity This unit meets the immunity requirements of EN 50082-1 including IEC 801-2 (ESD), IEC 801-3 (Radiated Susceptibility), and IEC 801-4 (EFT/B). 3.6 PHYSICAL SPECIFICATIONS This section details the physical specifications for the SEHI. Dimensions (H x W x D): 2.8 in x 17.0 in x 13.5 in (7.2 cm x 43.6 cm x 34.6 cm) Weight: 7 lb (3.
CHAPTER 4 INSTALLATION This chapter outlines the procedure for attaching the SEHI to the network as a stackable or standalone device. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing the SEHI. NOTE A single phase grounded power receptacle that meets the requirements listed in Chapter 3 must be located within seven feet of the installation.
Chapter 4: Installation 4.2 PRE-INSTALLATION CHECKOUT 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 grillwork on the right side of the hub. If the switch is UP, move it into the DOWN position with a non-metallic tool. Do not remove the chassis cover to perform this operation.
Tabletop or Shelf Installation 4.3 TABLETOP OR SHELF INSTALLATION This section provides guidelines for installation on a tabletop or shelf. Tabletop and shelf installations must be within reach of the network cabling and meet the requirements listed below: • In a shelf installation, the shelf must be able to support 30 pounds of static weight for each device in the stack.
Chapter 4: Installation Rack mounting the SEHI involves the following: • Attaching the strain-relief bracket • Rack mounting the SEHI • Stacking the SEHI when applicable WARNING Before installing the SEHI into a rack, ensure that the rack can support the device(s) without compromising the stability of the rack. Otherwise, personal injury and/or equipment damage may result. Attaching the Strain-Relief Bracket Attach the strain-relief bracket to the front of the SEHI as follows: 1.
Rackmount Installation Rack Mounting the SEHI Refer to Figure 4-4 and proceed as follows to install the SEHI into a 19-inch rack. 1. Remove the four cover screws (two from each side) located along the front edges of each side of the SEHI. Do not remove the cover from the SEHI100TX-22. Do not remove any other screws from the unit. 2. Using the four 6-32 x 3/8-inch replacement flathead cover screws provided in the rackmount kit, attach the rack mounting brackets to each side of the SEHI.
Chapter 4: Installation 3. Ensure that the rack used will support the unit, and that the rack will remain stable with the unit installed in it. Support the SEHI securely from underneath, and align the mounting brackets of the SEHI chassis with the screw holes in the equipment rack as shown in Figure 4-5. Fasten the SEHI to the equipment rack securely.
Powering Up and Stacking the SEHI 4.5 POWERING UP AND STACKING THE SEHI The following section details the procedures that must be followed to power up and interconnect stacked hubs. ! Failure to follow this procedure may result in damage to the equipment. CAUTION ! If you are using an intelligent hub (SEHI) to manage the stack, you must locate the SEHI at the bottom of the stack.
Chapter 4: Installation 3. Power up the SEH above the SEHI in the stack by plugging the power cord into the back panel of the SEH and plugging the other end into a grounded receptacle. 4. Verify that the PWR LED is on, indicating that the SEH is receiving power. ! CAUTION Do NOT connect the interconnect cable between the SEH and the SEHI before powering up the SEH. Otherwise damage to the SEH may result. 5.
Installing an EPIM 4.6 INSTALLING AN EPIM This section contains procedures on how to install the EPIM-100TX, EPIM-100FX, or the EPIM-100FMB 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. ! Observe all static precautions while handling an EPIM.
Chapter 4: Installation 4-10 SEHI100TX User’s Guide
CHAPTER 5 CONNECTING TO THE NETWORK 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. 5.1 CONNECTING THE SEHI TO THE NETWORK The procedure for connecting network segments to the SEHI varies depending on the media and ports being connected.
Chapter 5: Connecting to the Network 16X 15X X 14X 13 12X 2X 1X LNK 0TX EPIM-10 5X 4X 3X EPIM 1 1511_10 Figure 5-1 SEHI Network Ports 3. Check that the applicable LNK LED for the port is on. If the LED is off, perform each of the following steps until it is on: a. Check that the 100BASE-TX device at the other end of the twisted pair segment is powered up. b. Verify that the RJ45 connector on the twisted pair segment has the proper pinouts. c. Check the cable for continuity. d.
Connecting the SEHI to the Network Position X (crossed over) 1. RX+ 2. RX3. TX+ 4. NC 5. NC 6. TX7. NC 8. NC Position = (not crossed over) 1. TX+ 2. TX3. RX+ 4. NC Figure 5-2 5. NC 6. RX7. NC 8. NC 1511_11 EPIM-100TX Crossover Switch Connect an EPIM-100TX to a twisted pair segment as follows: 1. Connect the twisted pair segment to the module by plugging the RJ45 connector on the twisted pair segment into the RJ45 port on the module. See Figure 5-2. 2.
Chapter 5: Connecting to the Network 5.1.3 Connecting to an EPIM-100FX or EPIM-100FMB The EPIM-100FX and EPIM-100FMB have an SC style network port (see Figure 5-3). Cabletron Systems supplies fiber optic cables using SC connectors that are keyed to ensure proper crossover of the transmit and receive fibers. NOTE An odd number of crossovers (preferably one) must be maintained between devices so that the transmit port of one device is connected to the receive port of the other device and vice versa.
Testing the Installation 3. At the other end of the fiber optic cable, attach the SC connector to the other device. 4. Check that the EPIM-100FX (or EPIM-100FMB) LNK LED is on. If the LED is off, perform the following steps until it is on: a. Check that the power is turned on for the device at the other end of the link. b. Verify that there is a proper crossover of fiber optic strands between the applicable port on the SEHI and the fiber optic device at the other end of the fiber optic link segment. c.
Chapter 5: Connecting to the Network 5-6 SEHI100TX User’s Guide
CHAPTER 6 TROUBLESHOOTING This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems. It also describes how to reset the SEHI and how to reset the NVRAM switch. 6.1 INSTALLATION TEST After connecting the SEHI to the network, verify that packets pass between all Ethernet devices connected to the SEHI and any other devices connected to the network. If there is a problem with any of the attached devices, check the link as follows: 1.
Chapter 6: Troubleshooting 2. If the remote station is ready and the LNK LED is on, but no data passes through the port, one of two conditions may exist: • Network management has disabled the port. Correct this condition by enabling the port through network management. • The port is segmented either because the collision detector was on for more than 110 µs or the SEHI detected more than 32 consecutive collisions on the attached segment.
Using LANVIEW HubSTACK 100BASE-TX HUB WITH LANVIEW® SEHI100TX-22 RCV LNK A 22 21 20 19 18 17 16 15 14 13 12 PWR CPU CLN RESET COM RCV LNK 22X E 11 10 9 8 7 6 5 4 3 2 1 11X LED NAME LED COLOR DEFINITION PWR (Power) Off Green (Solid) No power Power CPU (Central Processing Unit) Off Green (Flashing) Green (Blinking) Red (Solid) CPU in BOOT process CPU initializing CPU functioning CPU not functioning CLN (Collision) Red (Flashing) Collision RCV (Receive) Yellow (Flashing) Off SEHI is rec
Chapter 6: Troubleshooting CPU This LED alternates from red to green to during power up. After the boot is complete, the LED blinks green. A blinking green LED indicates normal operation. A red LED indicates a faulty processor. CLN When this red LED flashes, it indicates that a collision has occurred on one of the ports. RCV When a yellow RCV LED flashes, it indicates that the SEHI is receiving data packets from the associated port segment.
Setting the NVRAM Switch 6.4 SETTING THE NVRAM SWITCH To prevent the possibility of electrical shock, do not remove the chassis cover to access the NVRAM switch, and use only a non-metallic tool when moving the NVRAM switch. The SEHI uses NVRAM to store user-entered parameters such as IP address and Community Names. To reset these parameters to the factory defaults, refer to Figure 6-2 and perform the following steps: 1.
Chapter 6: Troubleshooting 6-6 SEHI100TX User’s Guide
CHAPTER 7 LOCAL MANAGEMENT This chapter explains how to set up a management terminal to access the SEHI Local Management. It also explains how to use the Local Management screens and commands. Local Management supplies the tools to manage the SEHI and all of its attached segments. It allows the user to perform the following tasks: • Assign an IP address and subnet mask. • Select a default gateway. • Control access to the SEHI through the community names established in the Community Name Table.
Chapter 7: Local Management 7.1 KEYBOARD CONVENTIONS All key names appear in this manual as capital letters. For example, the enter (return) key appears as ENTER and the space bar appears as SPACE bar. Table 7-1 explains the keyboard conventions used in this manual as well as the key functions. Table 7-1 Keyboard Conventions Key Function RETURN Key and ENTER Key These are selection keys that perform the same Local Management function.
Management Terminal Setup 7.2 MANAGEMENT TERMINAL SETUP Use one of the following systems to access Local Management: • A Digital Equipment Corporation VT series terminal • A VT type terminal running emulation programs for the Digital Equipment Corporation VT series • An IBM or compatible PC running a VT series emulation software package An RJ45 console cable is required to attach the management terminal to the SEHI.
Chapter 7: Local Management Console Cable Configuration Use the RJ45 Cable Kit provided with the SEHI to attach the management terminal to the SEHI COM port as shown in Figure 7-1. Connect the console cable to the SEHI as follows: 1. Attach the male RJ45 connector to the COM port of the SEHI. 2. Attach the female end (25-pin or 9-pin, as applicable) to the COM port on the terminal.
Management Terminal Setup Management Terminal Setup Parameters Table 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. If the local management terminal uses terminal emulation of the VT320, refer to the equipment user manual for setup procedures.
Chapter 7: Local Management 7.3 ACCESSING LOCAL MANAGEMENT After configuring the local management terminal and properly attaching the cables to the SEHI, access the Local Management interface. Use the following steps to access Local Management: 1. Power up the terminal. The Password screen (Figure 7-2) appears. SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X.XX.XX Cabletron Systems Incorporated 35 Industrial Way, P.O. Box 5005 Rochester, NH 03867-0505 U.S.A.
Accessing Local Management 3. Press ENTER. • If the password entry is invalid, the cursor returns to the beginning of the password entry field. • If the password is valid, the associated access privilege appears briefly, then the Feature Selection screen (Figure 7-3) appears. NOTE If the terminal keyboard is not used for 15 minutes, the Local Management session ends and the screen defaults to the Password screen.
Chapter 7: Local Management 7.4 THE FEATURE SELECTION SCREEN The Feature Selection screen is the main menu screen for SEHI Local Management. There are five screen options in the Feature Selection screen: Community Name Table, IP Address Assignment, Component Trap Table, SNMP Tool Support, and Device Statistics. Use the arrow keys to highlight an option, then press ENTER (or press the corresponding Function key). The selected screen appears.
The Community Name Table Screen 7.5 THE COMMUNITY NAME TABLE SCREEN To access the Community Name Table screen from the Feature Selection screen, use the arrow keys to highlight the Community Name Table option, then press ENTER or F6. The Community Name Table screen shown in Figure 7-4 appears. SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X.XX.
Chapter 7: Local Management The following sections explain each field on the Community Name Table screen and provides instructions on how to change them. COMMUNITY NAME Displays the user-defined name through which a user can access Local Management for the SEHI. Any community name assigned here acts as a password to Local Management. ACCESS Indicates the access status accorded each community name.
The Community Name Table Screen 7.5.1 Editing the Community Name Field The password used to access Local Management at the Password screen must have Super-User privileges for the edits to take effect. If a password is entered with Basic-Read, Read-Only, or Read-Write privileges, Local Management displays the message “AUTHORIZATION PROHIBITS ACCESS”, and does not include editing capabilities. Use the following steps to edit the Community Name field: 1.
Chapter 7: Local Management 7.6 THE CONFIGURATION SCREEN To access the Configuration screen from the Feature Selection screen, use the arrow keys to highlight the IP Address Assignment option, then press ENTER or F7. The screen shown in Figure 7-5 appears. SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X.XX.XX CONFIGURATION I/F IP Address 1 000.000.000.000 SubNET Mask MAC Address 000.000.000.000 00-00-1d-05-dc-36 Default Gateway: 0.0.0.
The Configuration Screen IP Address Displays the IP address of the SEHI. SubNET Mask Displays the subnet mask for the SEHI. A subnet mask is a 32-bit quantity which “masks out” the network bits of the IP address. This is done by setting the bits in the mask to 1 when the network treats the corresponding bits in the IP address as part of the network or subnetwork address, or to 0 if the corresponding bit identifies the host. MAC Address Displays the physical address associated with the interface.
Chapter 7: Local Management 4. Use the arrow keys to highlight the SAVE option, then press ENTER or F6. The “SAVED OK” message appears indicating that the changes have been saved to memory. NOTE 7.6.2 NOTE The first time an attempt is made to exit the screen without saving the changes, a “NOT SAVED?” message is displayed. The edits are lost if the user proceeds to exit without saving the changes. Setting the Subnet Mask Consult the Network Administrator prior to setting the Subnet Mask.
The Configuration Screen NOTE 7.6.3 The first time an attempt is made to exit the screen without saving the changes, a “NOT SAVED?” message is displayed. The edits are lost if the user proceeds to exit without saving the changes. Setting the Default Gateway The Default Gateway field allows the user to describe the router through which the SEHI will be forwarding IP packets. Use the following steps to set the Default Gateway: 1. Use the arrow keys to highlight the Default Gateway field. 2.
Chapter 7: Local Management 1. Press the appropriate Function key. To return to the Feature Selection screen, use the arrow keys to highlight the RETURN command. 2. Press ENTER. The Feature Selection screen appears. 7.7 THE TRAP TABLE SCREEN Access the Trap Table screen from the Feature Selection screen using the arrow keys to highlight the Component Trap Table option, then press ENTER or F8. The screen shown in Figure 7-6 appears. SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X.XX.
The Trap Table Screen SNMP Community Name Displays the community name included in the trap message sent to the Network Management Station with the associated IP address. Traps Enables transmission of the traps to the network management station with the associated IP address. Trap IP Address Indicates the IP address of the workstation to receive trap alarms from the SEHI. 7.7.1 Configuring the Trap Table Use the following steps to configure the Trap Table: 1.
Chapter 7: Local Management 7.7.2 Exiting the Trap Table Screen Use the following steps to exit the Trap Table screen and return to the Feature Selection screen: 1. Press the appropriate Function key. To exit to the Feature Selection screen, use the arrow keys to highlight the RETURN command. 2. Press ENTER. The Feature Selection screen appears. 7.8 THE SNMP TOOLS SCREEN This section describes how to use the SNMP Tools screen to access Management Information Bases (MIBs).
The SNMP Tools Screen SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X.XX.XX SNMP TOOLS SNMP COMMUNITY NAME: public OID PREPEND: 1.3.6.1 GET SET GETNEXT F6 F7 F8 WALK RECALL-OID STEP CYCLES REPEAT F9 RETURN F10 1490_26 Figure 7-7 SNMP Tools Screen The following sections describe SNMP Tools screen fields. SNMP COMMUNITY NAME Identifies the community name used as a password to determine access level to the MIB component.
Chapter 7: Local Management GETNEXT Displays the OID following the current OID. WALK Allows the user to scroll through a section of the MIB leaf by leaf, from a user-specified object identifier. Leaves are the sections of the OID separated by periods. When a walk is initialized, the following categories for each walk entry, or step are displayed. • Specified OID – gives the number tag for that OID. • Size – identifies the number of bytes it takes to store that object.
The SNMP Tools Screen • Enter an “=” and the OID suffix (e.g., if =4.1.3 is entered, then the OID=4.1.3). This allows the user to not use the prepend. • Press F9 to recall an OID already entered. The user can then use the keyboard to modify the recalled OID as necessary. 3. Press ENTER. If there is no instance of that OID, the return code specifies “MIB_NO_INSTANCE”, otherwise, information about the data type, length, and value of that OID appears. 7.8.
Chapter 7: Local Management 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. The following are possible choices: integer, string, null, OID, IP address, counter, gauge, timeticks, and opaque. 5. Press ENTER. “DATA” appears. 6. Enter the value to correspond to the OID. If accepted, “ OPERATION CODE: XXXX ” appears, otherwise, an error message appears. 7.8.
The SNMP Tools Screen 7.8.6 Stepping Through OIDs Use the following steps to STEP through OIDs (the user can step through only after a GETNEXT): 1. Highlight STEP, using the arrow keys, then press ENTER. “Specify OID” appears. 2. Enter the OID (only the suffix is necessary) and press ENTER. The Tools screen begins to scroll one OID at a time, through all of the sublayers of the MIB available for that OID. 7.8.7 Cycling Through OIDs Use the following steps to CYCLE through an OID: 1.
Chapter 7: Local Management 7.9 THE DEVICE STATISTICS SCREEN This section describes the features of the Device Statistics screen. The user can view error, collision, and traffic statistics for the stack, a selected module, or a selected port. The user can also enable and disable ports. To access the Device Statistics screen from the Feature Selection screen, use the arrow keys to highlight the Device Statistics option, then press ENTER. The Device Statistics screen shown in Figure 7-8 appears.
The Device Statistics Screen ERRORS RECEIVED Displays the number of errors received. COLLISIONS Displays the number of collisions received. OOW COLLISIONS Displays the number of Out Of Window collisions. OOW collisions are usually caused by one or more of the following: • The network being too long due to the round trip propagation delay being greater than 5.12 µs (the collision domain is too large). • A station somewhere on the network is violating Carrier Sense and is transmitting at will.
Chapter 7: Local Management PORT SEG. STATUS Displays the segmentation status of the port selected. The two possible status messages are Segmented or Unsegmented. The SEHI and SEH automatically partition problem segments, and reconnect non-problem segments to the network. ENABLE PORT This command lets the user enable the selected port. DISABLE PORT This command lets the user Disable the selected port.
The Device Statistics Screen 7.9.1 Selecting the Appropriate Module/Port When the Device Statistics screen first appears, statistics are displayed for Module 1 and Port 1. View statistics for another module and port by using the Module x or Port x commands at the bottom of the screen. Use the following steps to select a module or port: 1. Use the arrow keys to highlight the Module or Port command. 2. Press the SHIFT and + or – keys until the desired module or port number appears. 3. Press ENTER.
Chapter 7: Local Management 7.9.4 Setting the UPDATE-FREQency Field This field changes the time interval between Stack/Module/Port counter updates. Use the following steps to set the update frequency: 1. Use the arrow keys to highlight the UPDATE-FREQ command at the bottom of the screen. 2. Use the + or – key to increase or decrease the time in 3-second increments until the appropriate time is displayed. 3. Press ENTER. The displayed time is saved. 7.9.
APPENDIX A EPIM SPECIFICATIONS A.1 EPIM SPECIFICATIONS EPIMs enable the connection of the SEHI to the network using different media types.The SEHI100TX-22 supports the EPIM-100TX, EPIM-100FX, and the EPIM-100FMB. This appendix provides the specifications for each EPIM. A.1.1 EPIM-100TX The EPIM-100TX is an RJ45 connector supporting Unshielded Twisted Pair (UTP) cabling. The slide switch on the EPIM-100TX determines the crossover status of the cable pairs.
Appendix A: EPIM Specifications A.1.2 EPIM-100FX The EPIM-100FX shown in Figure A-2 supports Multimode Fiber Optic cabling. The EPIM-100FX is equipped with an SC style connector. Specifications for the EPIM-100FX are listed in Table A-1. 16X 15X 14X 13X 12X LNK 0FX EPIM-10 5X 4X 3X 2X 1X EPIM 1 1511_17 Figure A-2 Table A-1 EPIM-100FX Transmitter Power (EPIM-100FX) Cable Type Worst Case Budget Typical Budget 50/125 µm fiber optic 6.0 dB 9.0 dB 62.5/125 µm fiber optic 9.0 dB 12.
EPIM Specifications A.1.3 EPIM-100FMB The EPIM-100FMB shown in Figure A-3 supports multimode fiber optic cabling and has an SC style connector. 16X 15X 4X 5X 14X 3X 13X 12X LNK 2X 0FMB EPIM-10 1X EPIM 1 1511_20 Figure A-3 EPIM-100FMB The EPIM-100FMB acts as a non-filtering bridge. Its purpose is to extend the Broadcast Domain of a shared access 100BASE-T LAN, so that a full length of fiber optic cable can be used to reach the next domain or more typically to a switch port.
Appendix A: EPIM Specifications The transmitter power levels and receive sensitivity levels listed are peak power levels after optical overshoot. A peak power meter must be used to correctly compare the values given above to those measured on any particular port. If power levels are being measured with an average power meter, add 3 dBm to the measurement to compare the measured values to the values listed above.
APPENDIX B IMAGE FILE DOWNLOAD USING OID STRINGS This appendix provides instructions for setting up a TFTP server and to download an image file to the SEHI by setting specific MIB OID strings. Set the OID strings with the SNMP Tools screen described in Chapter 7. NOTE Download an image file to the SEHI with a remote management package such as SPECTRUM, SPECTRUM Element Manager, or the appropriate SPECTRUM Portable Management Application.
Appendix B: Image File Download Using OID Strings B.1 SETTING UNIX WORKSTATION AS TFTP SERVER Downloading an image file requires setting up your UNIX workstation as a TFTP server. NOTE ! CAUTION Due to variations between UNIX systems, and individual configurations, this section provides only GUIDELINES for configuring a UNIX workstation to perform an image file download. The instructions include command examples, where appropriate. Bold lettering in examples indicates operator entry.
Standard Local Download 4. Store the hex image file in the /tftpboot directory as sehi.hex. NOTE This step requires decompression of the zipped image file. If you do not have a UNIX unzip utility, access to a PC with pkunzip, or a way to FTP the decompressed image to a UNIX workstation, contact Cabletron Systems Technical Support. 5. Edit the /etc/inetd.conf file by removing anything prior to the tftpboot daemon (e.g., the # sign) that comments-out the line. 6. Kill the inetd process (e.g.
Appendix B: Image File Download Using OID Strings Table B-1 OIDs and Settings Step OID Name OID Number Data Type SNMP OID Data 1. ctDLForceOnBoot 1.3.6.1.4.1.52.4.1.5.8.1.1.0 integer 1 2. ctDLCommitRAMToFlash 1.3.6.1.4.1.52.4.1.5.8.1.2.0 integer 1 3. ctDLTFTPRequestHost 1.3.6.1.4.1.52.4.1.5.8.1.4.0 IP Enter the IP address address of the TFTP server. 4. ctDLTFTPRequest 1.3.6.1.4.1.52.4.1.5.8.1.5.0 string (ASCII) Enter the path to the image file. 5. ctDLInitiateColdBoot 1.3.6.1.4.
INDEX Numerics D 100BASE-TX cable length 3-2 crosstalk 3-2 impedance 3-2 jitter 3-2 noise 3-2 propagation delay 3-3 temperature 3-3 Default gateway 7-15 Device statistics 00W collisions 7-25 alignment errors 7-25 bytes received 7-24 collisions 7-25 CRC errors 7-25 disable port 7-26 enable port 7-26 errors recieved 7-25 frames received 7-24 giant packets 7-25 module 7-26 port 7-26 port admin. status 7-25 port seg.
Index I P IP address 7-13 Port ENABLE override 7-15 Power supply requirements 3-7 L LANVIEW 6-2 LEDs 6-3 Local Management 7-1 accessing 7-6 community name table 7-9 configuration screen 7-12 console cable 7-4 device statistics 7-24 DISABLE port 7-27 ENABLE port 7-27 port enable override 7-15 setting default gateway 7-15 setting IP address 7-13 setting subnet mask 7-14 SNMP tools 7-18 terminal requirements 7-3 terminal setup 7-5 trap table 7-16 M Multimode fiber optic cable specifications 3-3 N Networ
POWER SUPPLY 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 end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application. GERMAN: Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei Leiter mit Erdleiter haben, wobei die Leiter mindestens 0.
