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Compaq Netelligent 3512 User Manual

Compaq Netelligent 3512 User Manual

100base-t repeater
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Netelligent 3512/3612
100Base-T Repeater
User Guide

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  • Page 1 Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 2 Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies. Registered United States Patent and Trademark Office. Netelligent is a trademark of Compaq Computer Corporation. Compaq Netelligent 3512/3612 100Base-T Repeater User Guide NOTICE 1996 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A.

  • Page 3: Federal Communications Commission Notice

    ......Federal Communications Commission Notice 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: European Union Notice

    Products with the CE (Community European) Marking comply with both the EMC Directive (89/336/EEC) and the Low Voltage Directive (73/23/EEC) issued by the Commission of the European Community. Compliance with these directives implies conformity to the following European Norms: EN55022 (CISPR 22) - Electromagnetic Interference EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity EN60950 (IEC950) - Product Safety This equipment complies with UL 1950, Second Edition;...

  • Page 5: Table Of Contents

    Internal DIP Switch...1-10 100Base-T Repeater Expansion ...1-10 Management Expansion...1-11 Ethernet Expansion ...1-11 Extending Your Network with Smart Uplink Modules ...1-12 Smart Uplink Configuration Examples...1-13 Smart Uplink Configuration 1...1-14 Smart Uplink Configuration 2...1-15 Smart Uplink Configuration 3...1-16 Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 6 viii Chapter 2 Planning Repeater Installation Optional Hardware ...2-1 Installation Requirements...2-1 Environmental Requirements...2-1 Electrical Requirements ...2-2 Spatial Requirements ...2-2 Cable Requirements ...2-2 Understanding Fast Ethernet Cable Budgets...2-3 Checking Your Cable Budget ...2-3 Cable Types and Distance Limitations ...2-4 Smart Uplink Port Cable ...2-8 Modem Cable...2-8 System Planning Charts ...2-9 Repeater Setup and Cabling Chart ...2-9...
  • Page 7 Starting the Management Session ...4-11 Error Messages ...4-12 Navigating Menu Option Screens ...4-13 Viewing System Information ...4-14 Error Messages ...4-14 Viewing the Stack Configuration...4-15 Viewing the Backup Port Configuration...4-16 Adding a Backup Port ...4-16 Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 8 Deleting a Backup Port...4-17 Updating the State of a Backup Port Entry ...4-17 Error Messages ...4-17 Viewing Port Statistics...4-18 Viewing Port Group Statistics...4-19 Changing Your Password...4-20 Error Messages ...4-20 Downloading Firmware ...4-21 Setting Up the Modem ...4-23 Logging Out of the Management Session...4-24 Appendix A Specifications Physical ...

  • Page 9: Preface

    Preface This guide contains information about how to install, operate, and manage the Compaq Netelligent 3512/3612 100Base-T Repeater. We recommend that you read all chapters in this guide to become familiar with the repeater's features and to ensure a successful installation.
  • Page 10 ......xii Preface The Glossary provides definitions for terms related to repeaters, as well as general networking terms.

  • Page 11: Overview

    Chapter 1 Overview The Compaq Netelligent 3512 and 3612 100Base-T Repeaters are designed to bring reliable 100 Mb/s performance to your desktop. Compaq Smart Uplink technology lets you interconnect the repeaters to increase the diameter of your network beyond the normal limitations set by 100Base-T Class 1 specifications.

  • Page 12: Package Contents

    Model 3512 or 3612 100Base-T 12-port repeater Shielded AC power cord Rack-mount kit (two side mounting brackets, eight 3/8-inch bracket screws, and four 1/2-inch rack mount screws) Four adhesive-backed rubber feet Compaq Netelligent 3512/3612 100Base-T Repeater User Guide Limited warranty...
  • Page 13 1/2-inch Rack Mount Screws (4) 3/8-inch Bracket Screws (8) Limited Warranty Limited Warranty ACTIVITY COLLISION 100BASE-TX 100BASE-T4 SMARTUP - T4 ACTIVITY COLLISION 100BASE-FX SMARTUP - FXSC 100BASE-FX Smart Uplink Modules (Optional) Netelligent 3512/3612 100Base-T Repeater User Guide ACTIVITY COLLISION ACTIVITY COLLISION...

  • Page 14: Repeater Components

    After the POST, all LEDs automatically change to their normal modes of operation. RJ-45 Ports and LEDs PWR A PWR B STATUS and Status LEDs Main Power Supply Smart Uplink Module Port Collision, Backplane 1, Backplane 2, and Backplane 3 LEDs Redundant Power Supply Hub Expansion Ports PWR B DOWN...
  • Page 15 The repeater successfully finished POST and ready to manage. The hardware override switch is enabled and the repeater is Global collisions are occurring anywhere in the repeater's No collisions Shows the currently selected backplane Shows that the backplane is not currently selected Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 16: Rj-45 Ports

    Overview RJ-45 Ports The repeater has 12 RJ-45 ports that let you connect UTP or STP cabling to workstations and servers in a 100Base-T network. Smart Uplink Port The Smart Uplink port houses a Smart Uplink Module (SUM), which serves as a connection point between repeaters, repeater stacks, and other manufacturers' 100Base-T repeaters or stacks.

  • Page 17: Power Supply

    (A). The right bay houses the redundant power supply (B). Figure 1-5. 90-Watt Power Supply Main Power Supply PWR A Figure 1-6. Power Supply Bays 100-240 VAC, 3A-1.5A,50/60 HZ Redundant Power Supply Netelligent 3512/3612 100Base-T Repeater User Guide PWR B DOWN...

  • Page 18: Migrating From 10Base-T To Fast Ethernet

    Overview Migrating from 10Base-T to Fast Ethernet Fast Ethernet (100Base-T) has evolved from standard Ethernet (10Base-T). Therefore, migrating to Fast Ethernet is fairly simple. Consider the following three suggestions as you incorporate Fast Ethernet into your network: Purchase dual-speed Network Interface Cards (NICs) from this point forward.

  • Page 19: Fast Ethernet Repeater Management

    If management is not available for the repeater, you can isolate a repeater's collision domain from the other repeaters in the stack by setting an internal DIP switch. This switch is accessible through the Power Supply A or B opening. Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 20: 100Base-T Repeater Expansion

    1-10 Overview See Appendix B, “Internal DIP Switch” for information about switch settings. CAUTION: switch. NOTE: Use the DIP switch only when all other configuration methods are unsuccessful. 100Base-T Repeater Expansion Each 100Base-T repeater has an expansion interface that consists of two 100- pin connectors (UP and DOWN) on the repeater's back panel.

  • Page 21: Ethernet Expansion

    20 times faster than a Fast Ethernet bridge and up to 200 times faster than an Ethernet bridge. This enhanced speed allows network transmissions to pass through multiple SUMs without significantly reducing throughput. The SUM also provides these features: Supports multiple repeater hops Backplane Segment Netelligent 3512/3612 100Base-T Repeater User Guide 1-11...

  • Page 22: Smart Uplink Configuration Examples

    1-12 Overview Standards-based (non-proprietary) uplinks to any available TX, T4, or FX repeater port Multiple SUMs configurable in a stack Supports up to 412 meter (fiber) uplinks between stacks when a SUM is used at each end Compatible with IEEE 802.3u Class I and Class II repeaters NOTE: Neither the 100Base-T repeaters nor the SUM have characteristics that limit the number of SUMs that can exist in a single collision domain.

  • Page 23: Smart Uplink Configuration 1

    Smart Uplink Configuration 1 Figure 1-10. Smart Uplink in a 100Base-FX Environment Fiber Uplink (412 m) Fiber Uplink (412 m) 100 m 100 m Smart Uplink Module 100 m Netelligent 3512/3612 100Base-T Repeater User Guide 1-13...

  • Page 24: Smart Uplink Configuration 2

    1-14 Overview Smart Uplink Configuration 2 TX Workstation TX Workstation Figure 1-11. Smart Uplink with 100Base-TX and 100Base-T4 100Base-TX Repeater 100 m 100Base-TX Smart Uplink 100Base-TX Repeaters TX Workstation 100 m 100 m Mixed 100Base-TX and 100Base-T4 Repeaters 100Base-T4 Smart Uplink 100 m 100 m T4 Workstation...

  • Page 25: Smart Uplink Configuration 3

    100Base-TX Smart Uplink Module Smart Uplink Module Smart Uplink Module 100 m 100 m 100 m 100 m TX Workstation TX Workstation TX Workstation T4 Workstation Figure 1-12. Smart Uplink in a Hierarchical Environment Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 26: Planning Repeater Installation

    Temperature: 32 to 104 F (0 to 40 C) Humidity: 5% to 95% (non-condensing) Altitude: 0 to 10,000 feet (0 to 9 km) Clearance: minimum of 2 inches (5.1 centimeters) on each side of the repeater to allow for proper ventilation Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 27: Electrical Requirements

    Planning Repeater Installation Electrical Requirements The electrical requirements for a repeater are as follows: Voltage: 100 to 240 VAC Power: 1.5 (@ 100 VAC) to 0.90A (@ 240 VAC) Frequency: 50 to 60 Hz CAUTION: source. Do not use a three-to-two pronged adapter at an outlet. Doing so may result in electrical shock and/or damage to the repeater and will void your warranty.

  • Page 28: Understanding Fast Ethernet Cable Budgets

    DTE-to-DTE cable budget: Locate the longest DTE-to-DTE cable run and add the lengths of all the cables (UTP and/or fiber) between the two DTEs. Repeater Server Propagation Delay Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 29: Cable Types And Distance Limitations

    Planning Repeater Installation Find the appropriate cable budget in the table below and verify that the cable length for your installation is less than or equal to the table entry. If the cable run you chose contains fiber, locate the longest DTE-to-DTE run in your installation that consists of only UTP cable and check its cable budget, as well.
  • Page 30 Collision domain diameter (total allowable distance end-to-end) is 200 meters (656 feet) Figure 2-2 shows the maximum cable distance for a DTE-to-DTE connection with one repeater repeater in the configuration using 100Base-TX cabling. 100m Repeater Figure 2-2. DTE-to-DTE 100Base-TX Connection 100m Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 31 Planning Repeater Installation Figure 2-3 shows a one-to-one cable pinout for 100Base-TX. Figure 2-3. One-to-One Cable Pinout for 100Base-TX NOTE: To prevent potential electromagnetic interference, terminate the unused wires (4, 5, 7, and 8). Figure 2-4 shows the crossover cable pinout for 100Base-TX. Figure 2-4.
  • Page 32 Figure 2-9 shows the maximum cable distance for a DTE-to-DTE connection with one repeater in the configuration using 100Base-FX cabling. 136m Class I Repeater Figure 2-6. DTE-to-DTE 100Base-FX Connection 412m 100Base-T Repeater with 100Base-FX Uplink Module 136m Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 33: Smart Uplink Port Cable

    Planning Repeater Installation Smart Uplink Port Cable The SUM requires the following types of cable: TX Version (Part No. 267045-001) (UTP or STP), Category 5 FX ST Type (Part No. 267042-001) fiber FX SC Type (Part No. 267043-001) fiber Modem Cable You can use a standard EIA RS-232 cable to connect the serial COM port, located on the front panel of the managed 100Base-T repeater (Model 3612), to a modem.

  • Page 34: System Planning Charts

    Unit Number Building Location Rack Mount Table Mount MAC Address IP Address Installed Uplink Module None FX (Fiber) Installed Redundant Power Supply Module Figure 2-7. Repeater Setup and Cabling Chart Date Port Connects To Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 35: Rack Inventory Chart

    2-10 Planning Repeater Installation Use this chart to record the devices installed in a particular rack. Wiring Closet Number Rack Number Installer Figure 2-8. Rack Inventory Chart Rack Inventory Chart Date Example 100Base-T Repeater 100Base-T Repeater...

  • Page 36: Installing The Repeater

    NOTE: Be sure you allow at least 2 inches (5.1 cm) on each side of the repeater for proper air flow. Rack-Mounting the Repeater To mount the repeater in a rack, use the supplied mounting brackets, 3/8-inch bracket screws, and 1/2-inch rack-mount screws. Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 37 Installing the Repeater To rack mount the repeater, follow these steps: 1. Remove the screws from the left and right sides of the repeater. (These screws are extras and are not needed to install the mounting brackets.) 2. Position the right bracket as shown in Figure 3-1 and attach it to the repeater using four of the smaller, 3/8-inch bracket screws.

  • Page 38: Installing A Smart Uplink Module

    3. Insert the SUM through the port hole, aligning the sides of the SUM with the card guides inside the repeater (Figure 3-4). ACTIVITY COLLISION 100BASE-TX ACTIVITY Smart Uplink COLLISION Module 100BASE-FX Smart Uplink Module 100BASE-FX Netelligent 3512/3612 100Base-T Repeater User Guide ACTIVITY COLLISION...

  • Page 39: Connecting Twisted-Pair Cable

    Installing the Repeater 4. Carefully push the SUM's 50-pin male connector into the SUM socket on the repeater motherboard until the SUM is firmly seated and its faceplate is flush with the repeater's front panel. 5. Secure the SUM to the repeater by tightening the SUM's spring screws. COM PORT Figure 3-4.

  • Page 40: Interconnecting Repeaters

    FlexPlane connector. This helps ensure the correct spacing between repeaters and helps prevent stretching and possibly damaging the FlexPlane cable during installation. 100Base-TX Repeater PWR A PWR B MGMT STATUS 100Base-T Workstation Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 41: Connecting Power

    Installing the Repeater WARNING: power down the entire repeater stack before you connect repeaters. PWR A PWR A Figure 3-6. Interconnecting Repeaters with a FlexPlane Connector Connecting Power Follow these steps to connect the repeater to power: 1. Plug the power cord into the power cord connector on the back of the repeater.

  • Page 42: Disconnecting Power

    From the Grounded Power Source Figure 3-8. Disconnecting Power Plugging in the power cord applies power to the repeater. Do Not Unplug the Power Cord From the Repeater’s Power Cord Connector PWR A 100-240 VAC, 3A-1.5A,50/60 HZ Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 43: Installing A Redundant Power Supply Module

    Installing the Repeater Installing a Redundant Power Supply Module The repeater comes with a pre-installed, 90-watt power supply module (PWR A). You can install an optional redundant power supply module (PWR B) for backup power. Contact your reseller for information about ordering an additional power supply module (Part No.
  • Page 44 NOTE: If the power supply module does not have power or is not functioning correctly, the PWR B LED indicator lights yellow. Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 45: Repeater Management

    Novell proprietary repeater MIB (to allow Novell Management Services to directly manage the repeater) Supported Frame Types The repeater supports the following frame types: 802.2 (IPX) 802.3 Raw (IPX) 802.2 SNAP (IPX and IP) Ethernet_II (IPX and IP) Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 46: Nvram

    Hub Management NVRAM Hub management configuration information supplied by the SNMP manager or the console manager (VT100 or Telnet) is stored in NVRAM (Non-Volatile RAM). This enables the repeater to recover from a power failure with its full configuration intact.

  • Page 47: Ip Autodiscovery Support

    IP messages can be up to 1520 bytes long. IP Autodiscovery Support Some SNMP management platforms, such as HP OpenView, cannot discover repeaters that are not in the ARP cache of a gateway or router. Therefore, it is necessary to regularly update the cache with the IP address of the repeater to be autodiscovered.

  • Page 48: Ipx Support

    The repeater also supports SAP (Service Advertising Protocol), RIP (Routing Information Protocol), and IPX diagnostics protocols. These features make the repeater HMI (Hub Management Interface) compliant. Using SAP, the repeater advertises itself as an HSL service. When Novell's NMS initiates autodiscovery, it produces bindery requests through NCP (NetWare Core Protocol) to a NetWare server.

  • Page 49: Rmon Support

    The only media-specific table defined is the etherHistoryTable, for Ethernet networks. You can specify the number of samples and sample interval. You can sample the following variables: Octets BroadcastPkts MulticastPkts CRCAlignErrors UndersizePkts OversizePkts Fragments Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 50: Alarm Group

    Hub Management Jabbers Collisions Utilization Alarm Group The Alarm group periodically takes statistical samples from variables and compares them to previously configured thresholds. The alarm table stores configuration entries, each of which defines a polling period and various threshold values. If a monitored variable exceeds a threshold value, the repeater generates an event.

  • Page 51: Intrusion Protection

    NOTE: If the SNMP manager tries to change the settings of mdcIntrusionPortStatus when mdcSecurityStatus is set to enable(2), a PDU error occurs. See “Security” in the next section for more information about the mdcSecurityStatus settings. Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 52: Security

    Hub Management Security The security feature provides further network security by restricting access to the mdcIntrusionPortStatus, mdcIntrusionPortMACAddress, and mdcIntrusionPortMACAddressStr MIB variables. You can restrict access to these intrusion table MIB variables by setting the mdcSecurityStatus MIB variable to enable(2). The default value is disable(1), which allows the SNMP manager to directly access the intrusion table through normal SNMP set PDUs (Protocol Data Units).

  • Page 53: Using The Vt100 Serial Port/Telnet Management Interface

    Boot and Runtime, which let you perform the following management operations: Boot Mode (STATUS LED is orange) View and edit system information Download firmware via XMODEM or TFTP (over Ethernet) Set up the modem Change the password Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 54: Runtime Mode

    4-10 Hub Management Runtime Mode (STATUS LED is green) All of the above functions plus: View and edit port and port group statistics/status Change the backup port configuration Change the stack configuration Download firmware via TFTP over SLIP (if the session is running...

  • Page 55: Starting The Management Session

    2. Within 20 seconds after a readable alphanumeric character string appears, enter the following command: VT100 The Login screen appears. Figure 4-1. Login Screen Netelligent 3512/3612 100Base-T Repeater User Guide 4-11...

  • Page 56: Error Messages

    4-12 Hub Management NOTE: If the 20 seconds expires before you enter VT100, you must wait for the port to cycle back to the modem initialization string. 3. Within 20 seconds after the Login screen appears, enter the password. The default password is <public>. The Main menu screen appears.

  • Page 57: Navigating Menu Option Screens

    Settings menu. Then uncheck the Use Function, Arrow, and Ctrl Keys for Windows option box. This enables the arrow keys to function correctly in the interface program. The following sections describe each menu option screen. Netelligent 3512/3612 100Base-T Repeater User Guide 4-13...

  • Page 58: Viewing System Information

    4-14 Hub Management Viewing System Information The System Information screen shows the primary system identification information. Figure 4-3. System Information Screen You can select the following IP frame types: Ethernet II or Ethernet 802.2 SNAP You can select the following IPX frame types: Ethernet II, Ethernet 802.2, Ethernet 802.3, or Ethernet 802.2 SNAP...

  • Page 59: Viewing The Stack Configuration

    The Managed Status field indicates the status of the repeater’s hardware management override switch setting (see “Appendix B: Internal DIP Switch”). If the field reads Yes, the switch is at its default (no management override) setting. Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 60: Viewing The Backup Port Configuration

    4-16 Hub Management Viewing the Backup Port Configuration The Backup Port Configuration screen shows information about the slot number of the primary and backup port and the current status of the ports. The screen also lets you add, delete, and enable or disable the state of backup port entries.

  • Page 61: Deleting A Backup Port

    3. Press the space bar until the desired option (Disabled or Enabled) appears. 4. Press the Enter key. Error Messages The following error messages can occur if there are incorrect entries: ERROR: Input fields not complete ERROR: Unable to set backup group Netelligent 3512/3612 100Base-T Repeater User Guide 4-17...

  • Page 62: Viewing Port Statistics

    4-18 Hub Management ERROR: Invalid module ERROR: Invalid port number ERROR: Unable to set backup group and port To move to the Return to menu field, the cursor must first be in the Action field. Viewing Port Statistics The Port Statistics screen shows statistical information for each port, as shown in the following illustration.

  • Page 63: Viewing Port Group Statistics

    The Port Group Statistics screen shows statistical information for a specific port group. This information includes the unit number, backplane number, backplane type, managed status, readable frames, and collisions. Figure 4-7. Port Group Statistics Screen Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 64: Changing Your Password

    4-20 Hub Management Changing Your Password The Change Password screen lets you change your current password. To change your password, follow these steps: 1. Enter the old password in the Old password field. NOTE: You must enter information in the Old password field to advance the cursor to the New and Verify password fields.

  • Page 65: Downloading Firmware

    1. Position the cursor on the Download Type field. Press the space bar to select Runtime Only or Boot/Runtime. 2. Position the cursor on the Protocol type field. Press the space bar to select the desired option (XMODEM, TFTP, etc.). Netelligent 3512/3612 100Base-T Repeater User Guide 4-21...
  • Page 66 4-22 Hub Management 3. Position the cursor on the Version field and enter the firmware version. This information must be correct for a successful download. Refer to any release notes, README files, or other documentation that accompanies the firmware upgrade for the correct firmware version.

  • Page 67: Setting Up The Modem

    The Modem Setup screen lets you enter the modem's initialization string and disable or enable auto negotiation. The default initialization string is usually adequate. For more information, refer to the modem documentation. Figure 4-10. Modem Setup Screen Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 68: Logging Out Of The Management Session

    ......4-24 Hub Management Logging Out of the Management Session The Logout screen lets you end the VT100 management session.

  • Page 69: Appendix A Specifications

    Humidity: Operating/Storage: 5% to 95% (non-condensing) Altitude: Operating: 0 to 10,000 ft, 0 to 3 km Storage: 0 to 30,000 ft, 0 to 9 km Storage: 32 to 151 F, 0 to 66 C Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 70: Appendix B Internal Dip Switch

    Switches 1 and 2: Backplane Select = Backplane 3 = Isolated After you set the switches and power on the repeater, all ports Netelligent 3512/3612 100Base-T Repeater User Guide Switch 3: Hardware Override = Enable Switch Settings = Disable Switch Settings...

  • Page 71: Upgrading The Dram

    4. Align the SIMM's contacts with the contacts in the SIMM socket. Then carefully press the SIMM into the socket. 5. Push the SIMM into the metal tabs until the SIMM snaps into place. 6. Replace the chassis cover. Netelligent 3512/3612 100Base-T Repeater User Guide...

  • Page 72: Glossary

    802.2 LLC header to provide sufficient space in the header to identify almost any network protocol. 802.3 An IEEE standard for Ethernet local area networks based on Carrier Sense Multiple Access with Collision Detection (CSMA/CD), which includes 10BASE2, 10BASE 5 and 10BASE-T. Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 73 Glossary 802.3 RAW A frame type that uses the packet format defined by the 802.3 IEEE standard without the additional header support such as that provided by 802.2. Address Resolution Protocol is used by the TCP/IP protocol stack to dynamically bind an IP address with a MAC address. Autopartition A port is autopartitioned (disabled) by the hardware after a continuous collision for 1024 to 2048 bit times or after it detects 32 consecutive...
  • Page 74 The communications port on a workstation, server, or other DTE. This port is sometimes referred to as the serial, RS-232, or DB-9 port. CSMA/CD Carrier Sense Multiple Access/Collision Detect. This communications access method is used by both 10Base-T and 100Base-T networks. Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 75 Glossary DB-9 A category of connector that contains nine pins. DB-9 connectors are commonly used for RS-232 interfaces. For example, a computer's serial (COM) port is usually a DB-9 connector. DIP Switch Dual In-line Package Switch. A DIP switch contains a set of small switches that are usually used to set a configuration component of a device.
  • Page 76 HMI specification. A node may emulate an HMI driver by supporting the Novell NWHUB.MIB and IPX autodiscovery. IPX Diagnostics: IPX diagnostics are required to support the Novell NetExplorer server. The NetExplorer server is used to update the NMS database with the current network configuration. Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 77 Glossary RIP: NetWare Routing Information Protocol (RIP) is the routing protocol used by IPX routers. Using a distance-vector routing protocol, it optimizes the routing between source and destination addresses by minimizing the "hop" count. The firmware supports RIP to allow NMS to ascertain the 3512/3612 repeater's MAC address, thus allowing NMS to initiate SNMP over IPX communications.
  • Page 78 The MAC address of a 3512/3612 repeater must be known before the repeater IP address can be set. Manageable A module is manageable if it contains a SNMP agent and there is a data communication path to that agent. Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 79 Glossary Management Information Base describes an agent's configuration flexibility, diagnostic ability and information that can be reported to a network management station. Media Interface Connector. A MIC is the physical connection between the optical fiber and a workstation in an FDDI installation. Media Independent Interface.
  • Page 80 Reverse Address Resolution Protocol. A Reverse ARP server can be used to set a repeater's IP address. Reconnection The hardware uses a standard reconnection algorithm that reconnects (i.e., enables) an autopartitioned port after data is received for 488 bit times without a collision. Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 81 G-10 Glossary Repeater Hop The action of a data transmission passing through a repeater in a communications circuit. IEEE 802.3 standards specify the number of repeater hops allowed for various types of repeaters. For example, Class II repeaters allow up to two repeater hops per segment. RJ-45 An 8-wire modular connector used for RJ-45 Ethernet and some telephones.
  • Page 82 SNMP Simple Network Management Protocol; a protocol used by network management stations to communicate management information over a UDP/IP or IPX network. ST Connector An optical medium connector plug and socket. Netelligent 3512/3612 100Base-T Repeater User Guide G-11...
  • Page 83 G-12 Glossary Stack A stack consists of one or more 3512/3612 repeaters. The maximum number of repeaters in a 100 Mb/s repeater stack is 5. Stack Order The stack order or stack group map is used by an SNMP network manager to display a graphical representation of a stack that matches the actual physical representation.
  • Page 84 Projects Agency (ARPA). The TCP controls the transfer of data and the IP provides a method for routing the data. Telnet A protocol in the TCP/IP suite of protocols that controls character- oriented terminal traffic. Netelligent 3512/3612 100Base-T Repeater User Guide G-13...
  • Page 85 G-14 Glossary TFTP Trivial File Transfer Protocol. TFTP can be used to download a new Flash image. Trap A trap is an unsolicited event sent from an agent to a network management station. Examples of traps include cold start, port autopartition and backup port enabled.
  • Page 86 Crossover cable pinout 2-6 CSMA/CD 2-5 DB9 1-6, 1-9 Default gateway 4-8, 4-9 Delta value 4-6 Disconnecting power 3-7 Distance limitations 2-4, 2-5 Downloading firmware 4-21 DRAM 1-5, 3-7 DTE-to-DTE 100Base-TX Connection 2-5 cable budget 2-3 Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 87 I-2 Index cable run 2-3, 2-4 connection 2-5 EIA 19-inch rack 3-1 Electrical requirements 2-2 Electrical shock 2-2 Emissions compliance 2-2 Environmental Requirements 2-1 EtherHistoryTable 4-5 Ethernet 2-3, 4-1 802.2 4-14 802.2 SNAP 4-14 connection 4-21 CSMA 2-3 expansion 1-11 networks 4-5 packet 2-3 Ethernet II 4-4, 4-9, 4-14...
  • Page 88 IPX protocol stack 4-2, 4-4 NMS 4-4 proprietary repeater MIB 4-1 repeater MIB 4-4 Null modem 4-21 cable 2-8 connection 4-11 NVRAM 4-8 Optional hardware 2-1 Out-of-band management 1-6, 1-11, 2-8, communications 1-9 Package contents 1-2 Password 4-12 Netelligent 3512/3612 100Base-T Repeater User Guide...
  • Page 89 I-4 Index changing 4-20 default 4-12 PDUs 4-8 Physical constraints of network interface 4-3 Pinout 2-6 Planning Repeater Installation 2-1 Polling 4-6 Port changing status of 4-7 Port group statistics 4-19 Port intrusion 1-9 Port statistics 4-18 Positioning repeater 3-2 POST 1-5, 3-7 Power disconnecting 3-7...
  • Page 90 Twisted pair 2-5 Type I 4-4 Unshielded twisted pair 1-1, 1-6, 2-4, 2-5 see Unshielded twisted pair Ventilation 2-1 VT100 console interface 1-6, 1-9, 4-9, 4-11 Windows Terminal program 4-10, 4-13 XMODEM 1-6, 4-10, 4-21 Netelligent 3512/3612 100Base-T Repeater User Guide...

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