Related Manuals for Cabletron Systems SEHI-22
Summary of Contents for Cabletron Systems SEHI-22
- Page 1 SEHI-22 AND SEHI-24 10BASE-T INTELLIGENT STACKABLE HUBS USER’S GUIDE CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005...
- Page 2 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. IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR...
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Page 3: Fcc Notice
NOTICE FCC NOTICE This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. -
Page 4: Program License Agreement
PROGRAM LICENSE AGREEMENT IMPORTANT: Before utilizing this product, carefully read this License Agreement. This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. -
Page 5: Exclusion Of Warranty
NOTICE AND DISCLAIMER OF LIABILITY EXCLUSION OF WARRANTY. writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its documentation and media). CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING... -
Page 6: Table Of Contents
CHAPTER 4 CONNECTING TO THE NETWORK CONNECTING THE SEHI TO THE NETWORK ... 4-1 4.1.1 Connecting to Network Ports, SEHI-22 and SEHI-24 ... 4-1 4.1.2 Connecting a UTP Segment to an EPIM-T ... 4-3 4.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3 ... 4-4 4.1.4... - Page 7 CONTENTS CHAPTER 5 TROUBLESHOOTING INSTALLATION CHECK-OUT ...5-1 USING LANVIEW ...5-2 USING THE RESET BUTTON...5-4 SETTING THE NVRAM SWITCH ...5-5 CHAPTER 6 LOCAL MANAGEMENT MANAGEMENT TERMINAL REQUIREMENTS ...6-2 6.1.1 Console Cable Configuration... 6-2 6.1.2 Management Terminal Setup Parameters... 6-3 ACCESSING LOCAL MANAGEMENT ...6-5 USING THE LOCAL MANAGEMENT SCREENS ...6-7 6.3.1 The Community Name Table Screen ...
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Page 8: Chapter 1 Introduction
10BASE-T HUB SEHI-22 SEH INTERCONNECT OUT Figure 1-1. Front and Rear Views of the SEHI-22 and SEHI-24 USING THIS MANUAL Read through this manual to gain an understanding of the features and capabilities of the SEHI. A general knowledge of Ethernet and IEEE 802.3 type data communications networks and their physical layer... -
Page 9: Getting Help
CHAPTER 1: INTRODUCTION Chapter 1, Introduction, outlines the contents of this manual, briefly describes SEHI features, and concludes with a list of related manuals. Chapter 2, Installation Requirements/Specifications, describes installation requirements, network guidelines, and SEHI operating specifications. Chapter 3, Installation, contains instructions for installing the SEHI as a stackable or stand-alone hub. -
Page 10: Sehi Overview
SEHI OVERVIEW The 10BASE-T SEHI-22 and SEHI-24 are intelligent repeater hubs. The SEHI-22 has 12 RJ45 ports and one Ethernet Port Interface Module (EPIM) port on the front panel for network connections while the SEHI-24 has 24 RJ45 ports and two EPIM ports on the front panel for network connections. -
Page 11: Lanview Leds
The SEHI intelligent hub is designed to manage the Cabletron series of SEH non-intelligent hubs. The SEHI serves as the logical “top” of the stack. It manages all SEH hubs in the stack providing full packet and error statistics for the entire stack, individual device, or individual port. -
Page 12: Remote Network Management Capabilities
REMOTE NETWORK MANAGEMENT CAPABILITIES REMOTE NETWORK MANAGEMENT CAPABILITIES Manage the SEHI remotely with any SNMP network management system. Cabletron Systems offers the following remote management packages: • Cabletron Systems SPECTRUM • Cabletron Systems Remote LANVIEW/Windows • Cabletron Systems Remote SPECTRUM Portable Management Applications •... -
Page 13: Chapter 1: Introduction
CHAPTER 1: INTRODUCTION Table 1-2 lists the board revision requirements for EPIMs used in the SEHI-22/24. The board revision number is located on the EPIM’s printed circuit board directly after the part number as shown in Figure 1-2. Table 1-2. EPIM Board Revision Requirements... -
Page 14: Related Manuals
HubSTACK Interconnect Cables Stack hubs together with Cabletron HubSTACK Interconnect cables. Table 1-3 lists the part number and the application for each cable. Table 1-3. HubSTACK Interconnect Cables Part Description Number 9380110 12" HubSTACK Interconnect Cable 9380111 18" HubSTACK Interconnect Cable Rack Mount Capabilities The SEHI can be installed in a 19-inch rack. -
Page 15: Chapter 2 Installation Requirements/Specifications
Failure to follow these guidelines could result in poor network performance. CABLE SPECIFICATIONS The SEHI-22 and SEHI-24 network ports support Shielded Twisted Pair (STP) or Unshielded Twisted Pair (UTP) cabling. Ethernet Port Interface Modules (EPIMs) expand a network using UTP, STP, Multimode Fiber Optic, Single Mode Fiber Optic, or Thin Coaxial cabling. -
Page 16: Utp And Stp Cable Specifications
CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 2.1.2 UTP and STP Cable Specifications The device at the other end of the twisted pair segment must meet IEEE 802.3 10BASE-T specifications. When connecting a 10BASE-T Twisted Pair Segment to the SEHI 10BASE-T Twisted Pair Network Ports and EPIM-T module, the network must meet the following requirements: Length The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices... - Page 17 CABLE SPECIFICATIONS Delay The maximum propagation delay of a 10BASE-T link segment must not exceed 1000 ns. This 1000 ns maximum delay limits the maximum link segment length to no greater than 200 meters. Crosstalk Crosstalk is caused by signal coupling between the different cable pairs contained within a multi-pair cable bundle.
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Page 18: Network Port Specifications
CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS NETWORK PORT SPECIFICATIONS The SEHI-22 and SEHI-24 network ports use shielded RJ45 connectors that support STP and UTP cabling. Figure 2-1 shows the RJ45 pinouts. 1 2 3 4 5 6 7 8 Figure 2-1. RJ45 Network Ports COM PORT REQUIREMENTS The RJ45 COM port supports access to a Local Management Console. -
Page 19: Transceiver Requirements
TRANSCEIVER REQUIREMENTS When connecting an external network segment via a transceiver to the SEHI with an EPIM-A, the following requirements must be met: • The transceiver or Ethernet Device to which the module will be connected must meet IEEE 802.3 standards, and/or Ethernet Version 1.0 or Version 2.0 standards. - Page 20 CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS Delay Times (Start of Packets): Twisted Pair to EPIM-A Twisted Pair to Twisted Pair EPIM-A to Twisted Pair Delay Times (JAM): Twisted Pair to EPIM-A Preamble: Input: Output: JAM Output: Fragment Extension: 1.10 s 1.00 s 1.00 s 960 ns Minimum of 40 bits required...
- Page 21 Fault Protection: Power Supply Requirements The SEHI has a universal power supply. This allows the use NOTE of an input power range from 100-125 and 200-240 Vac, 50-60Hz. The power supply has two outputs of +5 Vdc and +12 Vdc. The maximum output power is 40 W and the minimum efficiency is 65% under all conditions of line at full load.
- Page 22 Physical Dimensions (H x W x D): Weight: Predicted MTBF: 2.8" x 17.0" x 8.5" (7.2 cm x 43.6 cm x 21.6 cm) 7 lb (3.15 kg) SEHI-22/24: 651,695 hours SEHI USER’S GUIDE...
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Page 23: Chapter 3 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 2, Installation Requirements/Specifications, before installing the SEHI. Failure to follow installation instructions may result in an electrical shock hazard. -
Page 24: Pre-Installation Checkout
CHAPTER 3: INSTALLATION PRE-INSTALLATION CHECKOUT The SEHI is equipped with an NVRAM reset switch (Figure 3-1) 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. -
Page 25: Tabletop Or Shelf Installation
3.3.1 Tabletop or Shelf Installation The following two subsections provide guidelines for installation on a tabletop or shelf. Guidelines for Tabletop and Shelf Installations Tabletop and shelf installations must be within reach of the network cabling and meet the requirements listed below: •... -
Page 26: Rackmount Installation Requirements
CHAPTER 3: INSTALLATION 3.3.2 Rackmount Installation Requirements To install the SEHI in a 19-inch rack, Cabletron Systems offers an accessory kit to install the SEHI in a 19-inch rack that includes rack mount brackets, mounting screws, and a strain-relief bracket for cable management. -
Page 27: Attaching The Strain Relief Bracket
Figure 3-3. SEHI Rack Mount Hardware 3.3.3 Attaching the Strain Relief Bracket Attach the strain relief bracket to the front of the SEHI as follows: 1. Locate the strain relief bracket and four 8-32 x 3/8 inch screws from the accessory kit included with the SEHI. Do not use screws other than those included with the SEHI accessory kit. -
Page 28: Rackmounting The Sehi
CHAPTER 3: INSTALLATION 3.3.4 Rackmounting the SEHI Refer to Figure 3-5 and proceed as follows to install the SEHI into a 19-inch rack. 1. Locate the four 8-32 x 1/4" screws and the two rackmount brackets in the SEHI-ACCY-KIT package. Do not remove the cover from the SEHI. -
Page 29: Stacking The Sehi
HubSTACK SEHI-24 Figure 3-6. Installing the SEHI in the Rack If the installation requires that the SEHI is to be stacked, proceed to Section 3.3.5. Otherwise, continue by connecting power as described in Section 3.4. 3.3.5 Stacking the SEHI The rear panel of the SEHI has an Interconnect Bus Out Port (male connector). -
Page 30: Rear View
CHAPTER 3: INSTALLATION To stack SEH non-intelligent hubs together: 1. Attach the SEH HubSTACK Interconnect cable to the “OUT” port on the rear panel of the SEH as shown in Figure 3-7. 2. Attach the other end of the SEH HubSTACK Interconnect cable to the “IN”... -
Page 31: Connecting The Sehi To The Power Source
CONNECTING THE SEHI TO THE POWER SOURCE HubSTACK 10BASE-T HUB SEH-24 SEH INTERCONNECT HubSTACK 10BASE-T HUB SEH-24 SEH INTERCONNECT HubSTACK 10BASE-T HUB SEHI-24 SEH INTERCONNECT OUT Figure 3-8. Disconnecting the HubSTACK Interconnect Cable Proceed to Section 3.4 to connect power. 3.4 CONNECTING THE SEHI TO THE POWER SOURCE The SEHI has a universal power supply. -
Page 32: Adding/Replacing Epims
CHAPTER 3: INSTALLATION ADDING/REPLACING EPIMs This section contains procedures on how 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. -
Page 33: Chapter 4 Connecting To The Network
Prior to connecting the network cabling, check the connectors for the proper pinouts as shown in Chapter 2. 4.1.1 Connecting to Network Ports, SEHI-22 and SEHI-24 Attach unshielded twisted pair segments to the RJ45 Network Ports on the front panel of the SEHI. Each twisted pair port on the SEHI incorporates a Polarity Detection and Correction feature. - Page 34 CHAPTER 4: CONNECTING TO THE NETWORK To connect the twisted pair segments to the SEHI: 1. Insert the RJ45 connector from each twisted pair segment into the desired network port on the SEHI. See Figure 4-1. Figure 4-1. SEHI Network Ports 2.
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Page 35: Connecting A Utp Segment To An Epim-T
4.1.2 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 have been crossed over for the proper connection. If the wires do not cross over, use the switch on the EPIM-T to internally cross over the RJ45 port. -
Page 36: Connecting A Fiber Segment To An Epim-F1/F2/F3
CHAPTER 4: CONNECTING TO THE NETWORK d. Check that the twisted pair connection meets dB loss and cable specifications outlined in Chapter 2, Section 2.1.2. e. Check that the crossover switch is in the correct position. If a link is not established, contact Cabletron Systems Technical Support. 4.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3 When connecting a fiber optic link segment to an EPIM-F1, F2, or F3 keep the following in mind:... - Page 37 Do not touch the ends of the fiber optic strands, and do not let the ends come in contact with dust, dirt, or other contaminants. Contamination of the ends causes problems in CAUTION data transmissions. If the ends become contaminated, clean them with alcohol using a soft, clean, lint free cloth.
- Page 38 CHAPTER 4: CONNECTING TO THE NETWORK F1/F2 ST Connectors F1/F2 SMA 906 Connectors w/ Half Alignment Sleeves SMA 905 Connectors ST Connectors 1490_15 Figure 4-3. The EPIM-F1, EPIM-F2 and EPIM-F3 SEHI USER’S GUIDE...
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Page 39: Connecting A Thin-Net Segment To An Epim-C
4.1.4 Connecting a Thin-Net Segment to an EPIM-C To connect a thin-net segment to an EPIM-C: 1. Set the Internal Termination switch, located to the right of the port and labeled TERM to: • The ON position ( the port will be internally terminated at the port. •... -
Page 40: Connecting An Aui Cable To An Epim-A
CHAPTER 4: CONNECTING TO THE NETWORK When internal termination switch is set to off ( ): Connect BNC tee-connector to port. Attach a terminator or terminated thin-net segment to one female connector of tee-connector. Connect a terminated thin-net segment to other female connector of tee-connector. - Page 41 3. Connect the AUI cable to the AUI port located on the EPIM-A. See Figure 4-5. 4. Lock the AUI connector into place using the connector slide latch. 5. Check that the PWR LED on the EPIM-A is on. If the LED is not on, contact Cabletron Systems Technical Support.
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Page 42: Connecting An Aui Cable To An Epim-X
CHAPTER 4: CONNECTING TO THE NETWORK 4.1.6 Connecting an AUI Cable to an EPIM-X The Signal Quality Error (SQE) switch remains in the OFF position for most network connections. However, some Data Terminal Equipment (DTE) requires SQE. Refer to a DTE CAUTION manual for SQE requirement information. -
Page 43: Finishing The Installation
FINISHING THE INSTALLATION FINISHING THE INSTALLATION The SEHI is now 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. -
Page 44: Chapter 5 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. INSTALLATION CHECK-OUT 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. -
Page 45: Using Lanview
CHAPTER 5: 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. • The port is segmented either because the collision detector was on for more than 110 s or the SEHI detected more than 32 consecutive collisions on the attached segment. -
Page 46: Using Lanview
HubSTACK 10BASE-T HUB SEHI-24 RESET LED Name (Power) (Central Processing Unit) (Collision) (Receive) (Link) Note: Flashing indicates an irregular LED pulse. Blinking indicates a steady LED pulse. When this green LED is on, it indicates that the SEHI is receiving power. If this LED is off, it indicates a loss of input power. -
Page 47: Using The Reset Button
The LNK LED remains on as long as a link is maintained. Each SEHI Network Port (ports 1-12 on the SEHI-22 or ports 1-24 on the SEHI-24) has a corresponding LNK LED. -
Page 48: Setting The Nvram Switch
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 (Non-Volatile Random Access Memory) to store user-entered parameters such as IP address and Community Names. -
Page 49: Chapter 6 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. -
Page 50: Management Terminal Requirements
CHAPTER 6: LOCAL MANAGEMENT MANAGEMENT TERMINAL REQUIREMENTS 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 •... -
Page 51: Management Terminal Setup Parameters
2. Attach the female end (25-pin or 9-pin, as applicable) to the COM port on the terminal. HubSTACK SEHI-24 Console Cable COM Port Figure 6-1. Management Terminal Connection 6.1.2 Management Terminal Setup Parameters Table 6-1 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. - Page 52 CHAPTER 6: LOCAL MANAGEMENT Table 6-1. Terminal Setup Parameters Menu Display Setup: General Setup: Communications Setup: Keyboard Setup: Function Columns Controls Auto Wrap Test Cursor Mode Cursor Keys Transmit Receive XOFF Bits, Parity Stop Bit Local Echo Port Transmit Auto Answerback Auto Repeat Keyclick Margin Bell...
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Page 53: Accessing Local Management
ACCESSING LOCAL MANAGEMENT After configuring the local management terminal and properly attaching the cables to the SEHI, access the Local Management interface. To access Local Management: 1. Power up the terminal. The SEHI password screen (Figure 6-2) appears. Figure 6-2. Password Screen 2. -
Page 54: Password Screen
CHAPTER 6: LOCAL MANAGEMENT 3. Press the Return key. • 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 SEHI Local Management Feature Selection screen shown in Figure 6-3 appears. -
Page 55: Using The Local Management Screens
USING THE LOCAL MANAGEMENT SCREENS 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 Return (or press the corresponding Function Key). - Page 56 CHAPTER 6: LOCAL MANAGEMENT Community names are set through the Community Name Table option. Community names are passwords to Local Management and they are agents of security control to the SEHI. SEHI access is controlled by establishing up to four different levels of security authorization: Basic-Read, Read-Only, Read-Write, and Super-User.
- Page 57 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.
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Page 58: The Configuration Screen
CHAPTER 6: LOCAL MANAGEMENT 6.3.2 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 the Return key or F7. The Configuration screen shown in Figure 6-5 appears. - Page 59 USING THE LOCAL MANAGEMENT SCREENS 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.
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Page 60: Setting The Ip Address
CHAPTER 6: LOCAL MANAGEMENT Setting the IP Address 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.XXX.XXX.XXX, with values for XXX being from 0 to 255. The screen beeps if non-numerics or adjacent dots are entered. - Page 61 To set the subnet mask: 1. Use the arrow keys to highlight the SubNET Mask field. 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.
- Page 62 CHAPTER 6: LOCAL MANAGEMENT Using the Port ENABLE Override To set the Port ENABLE Override: 1. Use the arrow keys to highlight the Port ENABLE Override field. 2. Press the Return key to toggle from the default setting of “OVERRIDE DISABLED” to “OVERRIDE ENABLED”. 3.
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Page 63: The Trap Table Screen
6.3.3 The Trap Table Screen Access the Trap Table screen from the Features Selection screen using the arrow keys to highlight the Component Trap Table option, then press the Return key or F8. The screen shown in Figure 6-6 appears. SNMP Community Name <CR>... - Page 64 CHAPTER 6: LOCAL MANAGEMENT Configuring the Trap Table To configure the Trap Table: 1. Use the arrow keys to highlight the SNMP Community Name field, then enter the community name. 2. Press the Return key. 3. Use the arrow keys to highlight the Traps field and enter Y (or y) to send alarms from the SEHI to the workstation, or N (or n) to prevent alarms from being sent.
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Page 65: The Snmp Tools Screen
6.3.4 The SNMP Tools Screen This section describes how to use the SNMP Tools screen to access Management Information Bases (MIBs). Access to screen options depends on the access status accorded to the user’s community name. This section describes Super-User management capabilities. SNMP Tools allows access to valuable MIB information. - Page 66 CHAPTER 6: LOCAL MANAGEMENT The following sections describe SNMP Tools screen fields and instructions on how to change them. Community Name Identifies the community name used as a password to determine access level to the MIB component. 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.
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Page 67: Getting Individual Oids
Step Displays the MIB walk, step by step, giving the user time to view specific leaves in detail. Cycles Allows the user to specify the number of get next requests to cycle through and how much time will elapse between each request. Repeat Repeats the last Get command, allowing the user to monitor changes to a specific OID. - Page 68 CHAPTER 6: LOCAL MANAGEMENT Getting the Next OID To get the next OID: 1. Highlight GETNEXT by using the arrow keys, then press the Return key (or press the F8 function key). “<GETNEXT> OID (=|F9)” appears. 2. Enter the desired OID, or OID extension. (Press F9 to recall the last OID request.
- Page 69 Viewing Multiple OIDs Viewing several object identifiers at one time allows the user to quickly scan a MIB for the specific information that is needed. The Walk scrolls through OIDs numerically sequential to the initial OID request. The Step command scrolls the MIB Walk, one OID at a time. Cycling allows you to specify how many GetNext commands to cycle through for one OID.
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Page 70: Exiting The Snmp Tools Screen
CHAPTER 6: LOCAL MANAGEMENT Cycling Through OIDs To cycle through an OID: 1. Use the arrow keys to Highlight CYCLES, then press Return. 2. Enter the number of cycles desired to occur after “ENTER CYCLE COUNT:”, then press the Return key. 3. -
Page 71: Bytes Received
BYTES RECEIVED: FRAMES RECEIVED: ERRORS RECEIVED: COLLISIONS: OOW COLLISIONS: CRC ERRORS: ALIGNMENT ERRORS: RUNT PACKETS: GIANT PACKETS: PORT ADMIN. STATUS: PORT SEG. STATUS: Figure 6-8. Device Statistics Screen The following sections describe Device Statistics screen fields and instructions on how to change them. Bytes Received Displays the number of bytes received. - Page 72 CHAPTER 6: LOCAL MANAGEMENT OOW Collisions Displays the number of Out Of Window collisions. OOW collisions are usually caused by the network being too long where the round trip propagation delay is greater than 51.2 s (the collision domain is too large), a station somewhere on the network is violating Carrier Sense and transmitting at will, or a cable somewhere on the network failed during the transmission of the packet.
- Page 73 Disable Port This command lets the user Disable the selected port. Update-Freq This command lets the user select the time interval between Stack/Module/Port counter updates. Choose update intervals in increments of 3 seconds, with the maximum interval being 99 seconds. Module This command lets the user view statistics for a selected module in the stack.
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Page 74: Selecting The Appropriate Module/Port
CHAPTER 6: LOCAL MANAGEMENT Selecting the Appropriate Module/Port When the Device Statistics screen first appears, statistics are displayed for Module 1 and Port 1. To view statistics for another module and port, use the Module x or Port x commands at the bottom of the screen. To select a module or port: 1. - Page 75 Using the Disable Port Command The Disable Port 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. To set the Port Disable command: 1. Use the arrow keys to highlight the Disable Port command at the bottom of the screen.
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Page 76: A.1 Epim Specifications
A.1 EPIM SPECIFICATIONS EPIMs enable the connection of the SEHI to the main network using different media types. Cabletron Systems offers a variety of EPIMs. The following sections explain specifications for each EPIM. A.1.1 EPIM-T The EPIM-T is an RJ45 connector supporting UTP cabling. It has an internal Cabletron Systems TPT-T 10BASE-T Twisted Pair Transceiver. -
Page 77: Epim-F1 And Epim-F2
APPENDIX A: EPIM INFORMATION A.1.2 EPIM-F1 and EPIM-F2 The EPIM-F1 and EPIM-F2 shown 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. Specifications for the EPIMs are listed below. -
Page 78: A.1.3 Epim-F3
EPIM SPECIFICATIONS A.1.3 EPIM-F3 The EPIM-F3 shown in 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. Specifications for the EPIM-F3 are listed below. 1490_32 Figure A-3. - Page 79 APPENDIX A: EPIM INFORMATION Receive Sensitivity Maximum Receive Input Power Transmitter Power* (At 25 C into 8.3/125 m fiber) Less Power * Transmit Power Typical Power Coefficient (See Note Below)-0.15dBm/ Parameter Transmitter Peak Wave Length Spectral Width Rise Time Fall Time Duty Cycle Bit Error Rate: : The transmitter power levels given above are Peak Power Levels...
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Page 80: A.1.4 Epim-C
A.1.4 EPIM-C The EPIM-C supports thin-net 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. This eliminates the need to connect the port to a tee-connector and terminator. Figure A-4 shows the setting for the terminator switch. -
Page 81: Epim-A And Epim-X (Aui Port
APPENDIX A: EPIM INFORMATION A.1.5 EPIM-A and EPIM-X (AUI Port) The EPIM-A is a DB15 female connector used to attach segments to an external transceiver. The EPIM-X is equipped with dual internal transceivers. It has a DB15 male connector used to attach segments to an AUI cable. -
Page 82: Appendix B Image File Download Using Oids
IMAGE FILE DOWNLOAD USING OIDs 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 6. You can also download an image file using various remote packages such as Cabletron’s Remote LANVIEW/Windows. - Page 83 APPENDIX B: IMAGE FILE DOWNLOAD USING OIDs If unsure about how to properly configure your UNIX workstation using these guidelines, contact your System Administrator. CAUTION Note: For convenience, Cabletron includes the PKUNZIP utility for easy decompression of the “zipped” file. If you are using a UNIX workstation as a tftp server, and you do not have a decompression utility that recognizes the PKZIP format, you can obtain a copy of a UNIX decompression utility or the image file from the Cabletron Systems FTP...
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Page 84: Standard Local Download
2. If you do NOT have a /tftpboot directory, then create one (e.g., unix% mkdir tftpboot). 3. Ensure that the /tftpboot directory is not owned (e.g., unix% chown nobody tftpboot). 4. Store the hex image file in the /tftpboot directory as sehi.hex. This step requires decompression of the zipped image file. - Page 85 APPENDIX B: IMAGE FILE DOWNLOAD USING OIDs When performing the steps in table 1, keep the following in mind: • You must follow the steps in order. • Enter the IP address of the tftp server in standard dotted decimal notation (e.g., 132.177.118.24).
- Page 86 Numerics 10BASE-T cable length 2-2 crosstalk 2-3 delay 2-3 impedance 2-2 insertion loss 2-2 jitter 2-2 noise 2-3 temperature 2-3 UTP and STP specifications 2-2 AUI Cable 4-8, 4-10 Cable Specifications 2-1 UTP and STP 2-2 Cables HubSTACK Interconnect 1-7 Com Port 2-4 Daughter Board 1-7 Default Gateway 6-13...
- Page 87 Network Connection 4-1 AUI 4-8, 4-10 EPIM-A 4-8 EPIM-C 4-7 EPIM-F1/F2/F3 4-4 EPIM-T 4-3 EPIM-X 4-10 Fiber Optic Segment 4-4 SEHI-22/24 4-1 Thin-Net 4-7 Unshielded Twisted Pair 4-3 Network Port Specifications SEHI-22/24 2-4 NVRAM pre-installation checkout 3-2 setting 5-5 OIDs 6-17...
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Page 88: 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.
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