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Bay Networks 281xSA Using Manual

Ethernet hub
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Using the Model 281xSA
Ethernet Hub
Bay Networks, Inc.
SynOptics Communications, Inc.
4401 Great America Parkway
Santa Clara, CA 95054
408-988-2400
May 1994

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  • Page 1 Using the Model 281xSA Ethernet Hub Bay Networks, Inc. SynOptics Communications, Inc. 4401 Great America Parkway Santa Clara, CA 95054 408-988-2400 May 1994...

  • Page 2: Statement Of Conditions

    EN 55 022 Declaration of Conformance This is to certify that the SynOptics Communications Model 281xSA Ethernet Hub is shielded against the generation of radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a.
  • Page 3 Benutzer ist für den Erwerb der entsprechenden Kabel verantwortlich. Certificate of the Manufacturer/Importer It is hereby certified that the Model 281xSA Ethernet Hub has been suppressed in accordance with the conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters) in accordance with the regulations may, however, be subject to certain restrictions.
  • Page 4 893-743-A...

  • Page 5: Table Of Contents

    Use of Enter, Type, and Press Other Conventions xvii Related Publications xvii SynOptics Customer Support xviii Chapter 1 Overview of the Model 281xSA Hub Features Functional Description Management Functions in the Model 281xSA Hubs Dedicated Data Collection SNMP-based Management Agent Software...
  • Page 6 Interconnecting Hubs Using the MDI Port 1 3-19 Multiple-hub Networks—Including System 3000 Products 3-20 Chapter 4 Configuring the Model 281xSA Hub for IP/IPX Networks Required Network Information and Configuration Actions IP/IPX and BootP Network Configuration Options Using the Service Port...
  • Page 7 Setting Run-time Parameters 4-27 Protocol Parameters Menu 4-29 IP Parameters Menu 4-31 IPX Parameters Menu 4-33 SNMP Parameters Menu 4-34 SNMP Trap Receivers for IP 4-36 SNMP Trap Receivers for IPX 4-37 Out-of-Band Parameters Menu 4-40 Setting Security Parameters 4-41 Profile Parameters Menu 4-43 Boot Parameters Menu...
  • Page 8 Appendix G Setting Up the Model 281xSA Hub Configuration File Sample Configuration File Configuration Parameters Appendix H System Messages System Operation Display Messages Service Port Boot Messages TFTP Error and Information Messages Memory Error Messages Reset Message Service Port Run-time Messages...
  • Page 9 Power LED Figure 2-9. Attaching brackets for wall mounting 2-10 Figure 2-10. Template for wall mounting 2-11 Figure 2-11. Securing the Model 281xSA hub to the wall 2-12 Figure 2-12. Connecting the power cord 2-12 Figure 2-13. Power LED 2-13 Figure 3-1.
  • Page 10 Figure 3-17. Network including a Model 3000 concentrator 3-21 Figure 3-18. Fully manageable network composed entirely of Model 281xSA clusters and single hubs 3-22 Figure 4-1. Hardware address label Figure 4-2. Diagnostic messages for the Model 281xSA hub Figure 4-3.
  • Page 11 Figure F-1. Class A Internet Address Figure F-2. Class B Internet Address Figure F-3. Class C Internet address Figure F-4. Subnet field in a Class B address Figure I-1. Cover retaining screws Figure I-2. Removing the hub cover Figure I-3. SIMM location Figure I-4.
  • Page 12 893-743-A...
  • Page 13 Tables Table B-1. Model 281xSA hub LEDs Model 281xSA hub µP Fault and On Line LED Table B-2. combinations Table C-1. AUI port pin assignments (DB-15 socket) Table C-2. 10BASE-T port pin assignments (RJ-45 jack) Table C-3. RS-232 interface port pin assignments (DB-25 plug) Table C-4.
  • Page 14 893-743-A...

  • Page 15: Preface

    10BASE-T networks that use Simple Network Management Protocol (SNMP) network management. Purpose This guide describes how to install and use the Model 281xSA Ethernet Hub, including configuration rules for connecting Ethernet stations and making network interconnections. Configuration procedures for IP/IPX networks include instructions on how to prepare the hub for configuration, an explanation of how to use configuration...

  • Page 16: Conventions

    Preface Conventions This section describes the conventions used in this guide. Special Message Formats This guide uses the following formats to highlight special messages: NOTE: This format is used to highlight information of importance or special interest. CAUTION: This format is used to highlight information that will help you prevent equipment failure or loss of data.

  • Page 17: Other Conventions

    Related Publications Other Conventions This guide uses the following typographical conventions: italics Configuration file parameters; book titles; and UNIX file, command, and directory names. bold Configuration file keywords. Screen text, user-typed command-line entries. courier font Initial Caps Menu titles and window and button names. [Enter] Named keys in text are shown enclosed in square brackets.

  • Page 18: Synoptics Customer Support

    Preface SynOptics Customer Support For assistance with installing and configuring your SynOptics systems or for post-installation questions or problems, contact your local reseller. If you cannot contact your local reseller, call the SynOptics Technical Response Center (TRC) Contract Hotline. To contact the TRC Contract Hotline, call: U.S.

  • Page 19: Chapter 1 Overview Of The Model 281Xsa Hub

    Figure 1-2, respectively) are preconfigured for plug-and-play operation. These workgroup hubs support 10BASE-T Ethernet in a manageable, physical star configuration using a building’s existing premises wiring. Model 281xSA Ethernet Hubs offer a cost-effective solution for high-power, low-density 10BASE-T departmental segments, as well as the flexibility and expandability to support medium-density 10BASE-T workgroups operating within a large enterprise network.

  • Page 20: Features

    (STP) cable using a Model 822 10BASE-T-to- Type 1 Adapter – MDI/MDI-X configuration switch for port 1 to connect the Model 281xSA hub directly without using an external crossover cable or adapter – MDI-X-only configuration for ports 2 through 16 –...

  • Page 21: Functional Description

    Functional Description One standard RS-232 serial communications port, implemented on a DB-25 plug, for out-of-band connection to the telephone voice network through an external modem Installation options on a table, on a wall, or in a standard 19-inch equipment rack One local area network interface processor (LANIP) chip to collect network and station statistics, monitor functions, and provide SNMP communication for one Ethernet segment...

  • Page 22: Management Functions In The Model 281Xsa Hubs

    Overview of the Model 281xSA Hub Management Functions in the Model 281xSA Hubs The Model 281xSA hubs are part of a family of Ethernet SA management products that provide Advanced Analyzer functionality across the range of connectivity product families. In these products, dedicated hardware for packet capture and analysis frees the network interface to run SNMP communication under conditions of extreme network load.

  • Page 23: Agent Software

    Management Functions in the Model 281xSA Hubs Agent Software The agent software resident on the Model 281xSA hub uses the information collected by the LANIP chip to provide full management for the network segment to which it is connected. The basic role of the agent software is to: Gather statistics on network communications and activities.

  • Page 24: Support For Synoptics Optivity Features

    Autotopology provides accurate realtime display of the physical layout of the network by detecting and reporting all network management modules located on the network. Model 281xSA hubs also provide IPX Autotopology in addition to standard IP Autotopology. The details of Autotopology vary according to the platform on which the Optivity software is running.

  • Page 25: Thresholds

    Service Port Management The service port, located on the front panel of the Model 281xSA hub, provides a serial communication link to the hub. By connecting a terminal to this port, you can change the boot and run-time configuration parameter values for the network management functions in the hub.

  • Page 26: Chapter 2 Installing The Model 281Xsa Hub

    NOTE: Only qualified technicians should install and maintain this equipment. If you have ordered additional memory for your Model 281xSA hub, it is a good idea to install the new SIMM before you proceed with the hub installation. You can upgrade the memory on the Model 281xSA hub at any time, but you must open the hub cabinet to gain access to the SIMM socket.

  • Page 27: Operating Environment Requirements

    Installing the Model 281xSA Hub Operating Environment Requirements Make sure the area where you intend to install the Model 281xSA hub provides the following environmental conditions: Temperature – Ambient temperature between 5° and 40° C (41° and 104° F) – No nearby heat sources such as direct sunlight, warm air exhausts, or...

  • Page 28: Package Contents

    – Wiring hardware, such as punchdown blocks or patch panels, in place before installing the hub Package Contents Before you begin installing the Model 281xSA hub, check to see that you have the following items (see Figure 2-1): Model 281xSA Ethernet Hub...

  • Page 29: Required Tools And Materials

    Model 281xSA hub. Required Tools and Materials To install the Model 281xSA hub, you need the following tools and materials: #1 Phillips screwdriver for attaching mounting brackets #2 Phillips screwdriver for tightening rack-mounting screws For wall installation: –...

  • Page 30: Figure 2-2. Attaching Feet

    Table or Shelf Installation Table or Shelf Installation To install the Model 281xSA hub on a table or shelf, follow these steps: Peel off the protective backing from the rubber feet and apply one at each marked location on the bottom of the hub (see Figure 2-2).

  • Page 31: Figure 2-4. Power Led

    Installing the Model 281xSA Hub Turn on the power switch. Check the Power LED on the front panel (see Figure 2-4). If this LED does not light, contact your customer support representative. Expansion On Line µP Fault Power LED Control Isolate Power Data <Data>...

  • Page 32: Rack Installation

    Rack Installation Rack Installation To install the Model 281xSA hub in an equipment rack, follow these steps: Attach the mounting brackets. a. On each side of the hub, use a #1 Phillips screwdriver to remove the screws at the front corner (see Figure 2-5).

  • Page 33: Figure 2-6. Installing The Hub In An Equipment Rack

    Installing the Model 281xSA Hub Install the hub in the rack. a. Hold the hub with the mounting holes in the brackets aligned with holes in the rack (see Figure 2-6). On Lin e µP Fau Exp ans Po we r...

  • Page 34: Figure 2-7. Connecting The Power Cord

    Rack Installation Connect the power cord, first to the power entry receptacle on the back of the hub (see Figure 2-7) and then to the power outlet. EXPANSION 5 EXPANSION 4 EXPANSION 3 EXPANSION 2 4643 Figure 2-7. Connecting the power cord Turn on the power switch.

  • Page 35: Wall Installation

    Installing the Model 281xSA Hub Wall Installation In a wall installation, the Model 281xSA hub must be mounted on a wooden surface. Make sure half-inch plywood is securely attached to the wall where you intend to install the hub. NOTE: You must supply four #12 x 5/8 pan-head Phillips sheet metal screws for wall mounting the Model 281xSA hub.

  • Page 36: Figure 2-10. Template For Wall Mounting

    Wall Installation Prepare the wall for installing the mounting screws. a. Using Figure 2-10 as a guide, mark the mounting screw locations on the plywood where you plan to install the hub. b. Drill pilot holes at the marked locations. "...

  • Page 37: Figure 2-11. Securing The Model 281Xsa Hub To The Wall

    Installing the Model 281xSA Hub 2004.6 Figure 2-11. Securing the Model 281xSA hub to the wall Connect the power cord, first to the power entry receptacle and then to the wall outlet (see Figure 2-12). 4648 Figure 2-12. Connecting the power cord...

  • Page 38: 893-743-A

    Wall Installation Turn on the power switch. Check the Power LED on the front panel (see Figure 2-13). If this LED does not light, contact your customer support representative. Expansion On Line µP Fault Power LED Control Isolate Power Data <Data> Col AUI Port MDI-X/MDI Partition...

  • Page 39: Chapter 3 Network Configurations And Cable Connections

    Connections This chapter provides general requirements and recommendations for proper network configurations using the Model 281xSA Ethernet Hub. The chapter summarizes the possible expansion of a network from a single-hub network to one that encompasses several clusters and includes System 3000 equipment.

  • Page 40: Building Network Configurations

    As you increase the station count, the ability to add SNMP management support becomes increasingly important. At this point, you can add a single Model 281xSA hub and connect up to four Model 280x hubs through expansion ports, creating a Model 281xSA/280x hub cluster.

  • Page 41: Single-Hub Network

    Single-hub Network Single-hub Network A single-hub network using a Model 281xSA hub provides full SNMP management for up to 16 10BASE-T Ethernet stations. Figure 3-1 shows such a network configuration. In the work area, the Ethernet stations are attached to the UTP horizontal distribution cables through the AUI network interface card (NIC) and 10BASE-T transceivers.

  • Page 42: Cable Connections In The Work Area

    Network Configurations and Cable Connections Cable Connections in the Work Area The Ethernet station can have one of the following two types of network interface card installed: An AUI network interface card A 10BASE-T network interface card Using an AUI Network Interface Card If you are connecting an Ethernet station with an AUI network interface card, you must use an external 10BASE-T transceiver, such as the SynOptics Model 508B or 928 transceiver.

  • Page 43: Figure 3-3. Connecting A Model 928 Transceiver To A Network Station

    Single-hub Network 2517 Figure 3-3. Connecting a Model 928 transceiver to a network station Connect the cable between the transceiver and the wall outlet. a. If you are using a Model 508B transceiver, connect a UTP patch cable (for example, a Model 910 cable) from the RJ-45 port of the transceiver to the RJ-45 connector of the wall outlet (see Figure 3-4).

  • Page 44: Using A 10Base-T Interface Card

    Network Configurations and Cable Connections b. If you are using a Model 928 integrated transceiver, attach the captive cable on the Model 928 transceiver to the wall outlet (see Figure 3-5). Wall connector RJ-45 plug 4753 Figure 3-5. Connecting the Model 928 transceiver to the wall Repeat steps 1 and 2 for each type of station until all Ethernet stations are connected to the UTP horizontal distribution cabling through the RJ-45 connectors of wall outlets.

  • Page 45: Cable Connections In The Wiring Closet

    Cable Connections in the Wiring Closet To complete the connection of each Ethernet station to a 10BASE-T host port on the Model 281xSA hub, follow these steps: Verify that the total UTP segment length (including building wires and all patch cables used on any run between the station and the hub) does not exceed 100 meters.

  • Page 46: Figure 3-7. Mdi-X/Mdi Switch Set To The Mdi-X Position

    Network Configurations and Cable Connections Make sure the MDI-X/MDI switch on each Model 281xSA hub is set to the MDI-X position (see Figure 3-7). Expansion System Operation (Data) Link Part MDI-X/MDI Partition MDI-X/MDI switch 4651.1 Figure 3-7. MDI-X/MDI switch set to the MDI-X position The MDI-X/MDI switch is used to swap the pin assignments of the transmit and receive data wire-pairs for port 1.

  • Page 47: Figure 3-8. Connecting 25-Pair Utp Cable

    Single-hub Network Connect a 25-pair UTP cable from the punchdown block to a UTP patch panel (see Figure 3-8). Punchdown block with 50-pin telco connector Model 2813SA Ethernet Hub 50-pin Lat tisH ub 28 13 10BA SE-T Conc entra telco connector 25-pair cable...

  • Page 48: Figure 3-9. Model 281Xsa Hub 10Base-T Port Connection

    Network Configurations and Cable Connections Connect the other end to a 10BASE-T port on the Model 281xSA hub (see Figure 3-9). cable 4653 Figure 3-9. Model 281xSA hub 10BASE-T port connection Verify that the port Link LED is ON. NOTE: The System 2000 Ethernet hubs support the 10BASE-T specified link integrity test function.

  • Page 49: Cluster Configurations

    Cluster Configurations Cluster Configurations To add ports to a network made of a single Model 281xSA hub, or to add network management to a network made of a single Model 280x hub, you can create a Model 280x/281xSA cluster configuration. A cluster configuration (see Figure 3-10) consists of one Model 281xSA hub and one or more attached Model 280x hubs, up to a maximum of four Model 280x hubs.

  • Page 50: Cluster Operation

    These ports can be used to connect any combination of Model 2803 and 2804 hubs to the Model 281xSA hub. You cannot connect Model 280x hubs into a cluster without a Model 281xSA or Model 281x hub.

  • Page 51: Figure 3-11. Connecting A Cluster Configuration

    Model 280x hub. b. Connect the other end of the expansion cable to an available expansion port on the Model 281xSA hub. At this point, if the hub power is on, one LED lights on each hub, as follows: The Expansion Status LED on the Model 281xSA hub lights.

  • Page 52: Multiple-Hub Networks-System 2000 Only

    Network Configurations and Cable Connections Multiple-hub Networks—System 2000 Only Individual System 2000 hubs or Model 280x/281xSA cluster configurations can be interconnected through a backbone interconnection or through the MDI-X/MDI ports. Backbone connections are made through the interconnect port, either the AUI port (Model 2813SA hub) or the 10BASE-FL port (Model 2814SA hub).

  • Page 53: Connecting The Aui Port To A Fiber Backbone

    Multiple-hub Networks—System 2000 Only Connecting the AUI Port to a Fiber Backbone Connecting an IEEE 802.3 10BASE-FL transceiver to the AUI port on the Model 2813SA hub allows you to connect the Model 2813SA hub to a fiber backbone. Figure 3-12 shows a typical network with two Model 2813SA hubs connected to a fiber backbone.

  • Page 54: Connecting The Aui Port To Coaxial Backbone

    IEEE 802.3 transceiver. Connecting the AUI Port to Coaxial Backbone You can use the AUI port to connect a Model 281xSA hub to a coaxial backbone through an IEEE 802.3 MAU. Figure 3-13 shows a Model 2813SA hub and a Model 2803/2813SA cluster connected to a coaxial backbone through IEEE 802.3 MAUs.

  • Page 55: Figure 3-13. Interconnecting Model 281Xsa Hubs Using Coaxial Backbone

    SNMP management station 4657 Figure 3-13. Interconnecting Model 281xSA hubs using coaxial backbone To connect a Model 2813SA hub to a coaxial backbone, follow these steps: Disable the SQE test on the IEEE 802.3 MAU. Connect the MAU to the coaxial backbone.

  • Page 56: Interconnecting Model 2814Sa Hubs Using The 10Base-Fl Port

    Network Configurations and Cable Connections Interconnecting Model 2814SA Hubs Using the 10BASE-FL Port Figure 3-14 shows two Model 2814SA hubs connected via their 10BASE-FL fiber ports. A fiber cable is connected directly between the ports on the two hubs; TX on each hub is connected to RX at the other end. Model 2814SA Ethernet Hub LattisHub 2814SA Fiber optic cable...

  • Page 57: Interconnecting Hubs Using The Mdi Port 1

    MDI to MDI-X. Ports 2 through 16 are internally configured as MDI-X ports, and the switchable port 1 is factory-set to be an MDI-X port. If you intercon- nect two Model 281xSA hubs through port 1 on both hubs, you must change one port (but only one) to the MDI setting.

  • Page 58: Multiple-Hub Networks-Including System 3000 Products

    10BASE-T port on a hub at the next higher level in the network hierarchy. Repeat steps 1 and 2 for each Model 281xSA hub that is to be interconnected through an MDI port 1 to another hub. Multiple-hub Networks—Including System 3000 Products The Model 281xSA Ethernet Hubs readily interconnect with SynOptics System 3000 products, using the same cabling procedures already described.

  • Page 59: Figure 3-17. Network Including A Model 3000 Concentrator

    4661 Figure 3-17. Network including a Model 3000 concentrator You can also substitute a Model 281xSA/280x cluster for the Model 3000 concentrator shown in Figure 3-17. Figure 3-18 shows such a network in which a Model 2814SA/2804 cluster serves as the central point for the star-wired configuration.

  • Page 60: Figure 3-18. Fully Manageable Network Composed Entirely Of Model 281Xsa Clusters And Single Hubs

    Model 2814SA Ethernet Hub LattisHub 2814SA Model 281xSA hub cluster Model 2814SA Ethernet Hub LattisHub 2814SA Model 2804 hubs cables to Ethernet stations 4662 Figure 3-18. Fully manageable network composed entirely of Model 281xSA clusters and single hubs 3-22 893-743-A...

  • Page 61: Chapter 4 Configuring The Model 281Xsa Hub For Ip/Ipx Networks

    To manage the Model 281xSA hub in an IP or IPX network environment, you must have the hardware address of the Model 281xSA hub set up in the IP or IPX load server configuration file. The hardware address consists of 000081 followed by the number printed on the address label on the 281xSA front panel (see Figure 4-1).

  • Page 62: Ip/Ipx And Bootp Network Configuration Options

    file parameter descriptions are given in Appendix G, “Setting Up the Model 281xSA Hub Configuration File.” If the network is IPX based, you do not configure the Model 281xSA hub manually through the service port because the hub automatically obtains required IPX network information from the network.

  • Page 63: Using The Service Port

    Attaching a terminal allows you to view system startup diagnostics or to configure the hub. When the Model 281xSA hub receives power, it runs self-test diagnostics and reports the results to the service port. If you have a standard RS-232 character terminal connected to the port (as explained in the following section), you can observe the diagnostic messages as the hub boots or goes through a reset.
  • Page 64 Model 281xSA service port, such as the results of the self-diagnostic tests that run automatically after the hub is reset or the power is turned on. To prepare the Model 281xSA hub for configuration or to view the service port messages from the Model 281xSA hub, perform the next step.

  • Page 65: Power-On Self-Test Diagnostic Messages Display

    If an error occurs, the self-test loops to the point of the error. If the error persists, the Model 281xSA hub resets itself and restarts. If the same error message repeatedly displays on the monitor, or if the Fault LED remains lit, contact your supplier’s customer service department.

  • Page 66: Figure 4-3. Bootp Service Port Screen Display

    DCE#1 trying BOOTP 4755 Figure 4-3. BootP service port screen display To stop the automatic process and access the Model 281xSA boot configuration menus, press [Ctrl]+C. See “Setting the Boot Configuration without a BootP Server” later in this chapter. 893-743-A...

  • Page 67: Summary Of The Boot Sequence With A Bootp Server

    Configuration load mode = Remote w/Local Read community = public Write community = private The first time the Model 281xSA hub is powered on, it uses these settings to perform the following boot sequence: The Model 281xSA hub performs a diagnostic self-test and displays the results on the terminal screen connected to the service port (if one is connected).

  • Page 68: Setting The Boot Configuration Without A Bootp Server

    EPROM. The Model 281xSA run-time image file begins execution. The green On Line LED of the Model 281xSA hub is on, and the yellow µP Fault LED is off, indicating normal operation.

  • Page 69: Figure 4-4. Boot Main Menu

    “Connecting to the Model 281xSA Service Port” earlier in this chapter. Turn on the power to the Model 281xSA hub; if it is already powered, press the Reset button on the front panel. Press [Ctrl]+C while the hub is attempting its boot processes and the screen reads “DCE#1 trying BOOTP...”...

  • Page 70: Figure 4-5. Boot Messages (Remote Image File Load)

    Configuring the Model 281xSA Hub for IP/IPX Networks Press [Esc] to return to the 281xSA Boot main menu. Press f [Toggle config load mode] once to set the configuration load mode to Local. Press m [Toggle boot mode] to set the boot mode to NVRAM.

  • Page 71: Figure 4-6. Boot Messages (Local Image File Load)

    4758 Figure 4-6. Boot messages (local image file load) At this point, the Model 281xSA hub is completely operational and requires no user intervention. If you want to change any run-time parameters, press [Ctrl]+Y to display the run-time parameters menu. This menu and associated submenus are described in later sections of this chapter.

  • Page 72: Using Configuration Menus

    Configuring the Model 281xSA Hub for IP/IPX Networks Using Configuration Menus To configure the Model 281xSA hub through the service port, you use configuration menus on the display of the terminal connected to the service port. There are two series of configuration menus: One menu series (see Figure 4-7) sets the primary boot configuration;...

  • Page 73: Figure 4-8. Run-Time Parameters Menus

    4760 Figure 4-8. Run-time parameters menus Menus for configuring the Model 281xSA hub have similar formats. Each menu shows the current settings for a group of parameters, followed by a list of commands for changing the parameters (see Figure 4-9 for an example).

  • Page 74: Commands

    Configuring the Model 281xSA Hub for IP/IPX Networks Boot Main Menu 281xSA Ethernet NMM MAC Address: 00:00:81:xx:xx:xx Boot Mode: Network Image Load Mode: Remote w/local Config Load Mode: Remote w/local Boot Protocol: Auto Management Protocol: IP_IPX -Toggle boot mode -System configuration menu...

  • Page 75: Boot Configuration Menus

    Boot Configuration Menus To set the primary boot configuration without a BootP server, press [Ctrl]+C during the boot process to display the menu shown in Figure 4-10. Boot Main Menu 281xSA Ethernet NMM MAC Address: 00:00:81:xx:xx:xx Boot Mode: Network Image Load Mode: Remote w/local...

  • Page 76: Boot Configuration Commands

    The j and x commands open submenus that configure the IP and IPX operating parameters. The k, z, e, g, and w commands initiate an action by the Model 281xSA hub. The c and b commands open submenus to configure the Model 281xSA hub for booting.
  • Page 77 Boot Configuration Menus NOTE: If m [Toggle boot mode] is set to NVRAM, this parameter is ignored. When Auto is selected, the Model 281xSA hub tries to find its IP or IPX configuration parameters over the network. This process has two stages: First the Model 281xSA hub seeks the IP parameters and configuration file from a BootP server, transfers the configu-...
  • Page 78 If it finds one, it transfers the configuration file, obtains the IPX network number, and writes the parameter values into NVRAM. If it fails to find IP parameters, the Model 281xSA hub resets itself and starts the booting process over.
  • Page 79 file from onboard local flash EPROM. NOTE: When the image load mode is set to Local, local loading of the image file will not be performed if the Model 281xSA hub has neither an IPX nor an IP address. If the local image file is corrupted, you are not allowed to set the image load mode to Local.
  • Page 80 “IPX Configuration Menu”) that allows you to set or modify the Model 281xSA hub IPX network number. [Load and execute boot files] Directs the Model 281xSA hub to try to load the configuration specified by the parameter values shown on the menu and begin operation.

  • Page 81: System Configuration Menu

    Boot Configuration Menus System Configuration Menu When you select the c command [System configuration menu] from the Boot main menu, the menu in Figure 4-11 is displayed. System Configuration Menu 281xSA Ethernet NMM Revisions System Configuration DRAM Firmware: 2 MB...

  • Page 82: Boot File Configuration Menu

    Configuring the Model 281xSA Hub for IP/IPX Networks This menu includes the following commands: [Toggle all RAM tests] Enables or disables the DRAM self-tests when you power up the hub. [Esc] [Return to Boot Main Menu] Returns the display to the Boot main menu.
  • Page 83 filename that is part of the configuration file. [Get config file info from network] This command allows you to perform a BootP sequence without actually booting up the Model 281xSA hub. [Esc] [Return to Boot Main Menu] Returns the display to the Boot main menu.

  • Page 84: Ip Configuration Menu

    Configuring the Model 281xSA Hub for IP/IPX Networks IP Configuration Menu When you select the j command [IP configuration menu] from the Boot main menu, the menu in Figure 4-13 is displayed. IP Configuration Menu 281xSA Ethernet NMM IP Address: xxx.xxx.xxx.xxx...

  • Page 85: Ipx Configuration Menu

    This menu includes the following commands: [Set IP address] Use this command to identify the network IP address of the Model 281xSA hub. The address can be up to 12 numeric characters, written in dotted-decimal notation. This is the Internet address the hub uses during operation. To set this address to [none], enter 0.0.0.0 or type [none].
  • Page 86 [Set network number] Eight numeric characters, identifying the IPX network number the Model 281xSA hub is attached to. This is the network number the hub uses during operation. To set this number to [none], enter 00000000.

  • Page 87: Setting Run-Time Parameters

    If you change any of these settings, you must store the new settings in NVRAM (the w command) and either restart or reset the Model 281xSA hub (the r or z command) in order for the new settings to take effect.
  • Page 88 [Write values to EEPROM] Saves the current parameter values (including any you have just changed) to the NVRAM. When the Model 281xSA hub is restarted, it uses these values during booting. [Exit] Takes you out of the configuration process without saving any changed values.

  • Page 89: Protocol Parameters Menu

    Upon confirmation, the screen immediately scrolls to the SynOptics banner and displays the message “Press CTRL-Y to begin.” [Reset 281xSA] Resets the unit. This command causes the Model 281xSA hub to go through self-tests and the image-loading process again.
  • Page 90 When IP_IPX is selected, the Model 281xSA hub can be managed by either IP or IPX network management stations. When IP is selected, the Model 281xSA hub can be managed only by IP network management stations. When IPX is selected, the Model 281xSA hub can be managed only by IPX network management stations.

  • Page 91: Ip Parameters Menu

    (see Figure 4-18). The new settings will take effect only after you exit the configuration program and save them to NVRAM (using the w command on the main menu), then restart or reset the Model 281xSA hub. 893-743-A 4-31...

  • Page 92: Figure 4-18. Changing The Ip Parameters

    (N.N.N.N, with N being a value from 0 to 255, inclusive). These characters identify the network address of the Model 281xSA hub. To set this address to [none], enter 0.0.0.0. If the address is none, that parameter entry remains blank at the top of the menu.

  • Page 93: Ipx Parameters Menu

    Setting Run-time Parameters [Set router’s IP address] Up to 12 numeric characters, written in dotted-decimal notation. To set this address to [none], enter 0.0.0.0. [Set secondary default router’s IP address] Up to 12 numeric characters, written in dotted-decimal notation. To set this address to [none], enter 0.0.0.0.

  • Page 94: Snmp Parameters Menu

    This menu includes the following commands: [Set network number] Eight numeric characters, identifying the IPX network number the Model 281xSA hub is attached to. This is the network address the Model 281xSA hub uses during operation. To set this address to [none], delete the entry.
  • Page 95 Setting Run-time Parameters This menu includes the following commands: [Set read community] Up to 20 alphanumeric characters that specify the SNMP community string used for read-only SNMP operations. To set this value to [none], press [Enter] without typing any other characters. This disables access to the read-only objects. [Set read/write community] Up to 20 alphanumeric characters that specify the SNMP community string used for read and write SNMP operations.

  • Page 96: Snmp Trap Receivers For Ip

    Configuring the Model 281xSA Hub for IP/IPX Networks SNMP Trap Receivers for IP When you select the i command [Set IP trap receivers] from the SNMP Parameters menu, the menu shown in Figure 4-21 is displayed. IP SNMP Trap Receivers Menu...

  • Page 97: Snmp Trap Receivers For Ipx

    Every 10 minutes it reregisters. If a management station is removed from the network or does not reregister, the Model 281xSA hub ages out the IP address. When the timer is set to 0 milliseconds, the entry never ages out.

  • Page 98: Figure 4-22. Snmp Ipx Trap Receivers Menu

    Configuring the Model 281xSA Hub for IP/IPX Networks IPX SNMP Trap Receivers Menu IPX trap receivers defined: [none] [none] [none] [none] [none] [none] [none] [none] [none] [none] Add a receiver Delete a receiver Return Enter command: 4773 Figure 4-22. SNMP IPX Trap Receivers menu...
  • Page 99 Once an entry ages out, it is removed from the table. When a management station learns about a Model 281xSA hub on the network, it auto- matically registers its IPX address in the trap receivers table and sets the age-out timer to 180,000 milliseconds (30 minutes).

  • Page 100: Out-Of-Band Parameters Menu

    Configuring the Model 281xSA Hub for IP/IPX Networks Out-of-Band Parameters Menu When you select the o command [Set out-of-band parameters] from the run- time parameters menu, the menu in Figure 4-23 is displayed. Out-of-Band Parameters Menu Initialization String: [none] Baud rate:...

  • Page 101: Setting Security Parameters

    When you select the c command [Set security parameters] from the run-time parameters menu, the menu in Figure 4-24 is displayed. The service port on the Model 281xSA hub features a security lock software switch for protection of the node security configuration. This switch lets you prevent unauthorized changes to the security settings without physical access to the hub.
  • Page 102 Configuring the Model 281xSA Hub for IP/IPX Networks Set Security Parameters Security level: Security configuration lock: Set security level Toggle security configuration lock -ESC Return to main menu Enter command: 4775 Figure 4-24. Set Security Parameters menu This menu includes the following commands:...

  • Page 103: Profile Parameters Menu

    This menu includes the following commands: [Set location] Up to 64 alphanumeric characters that represent the location of the Model 281xSA hub. This entry is useful for determining the physical location of a hub. [Set name] Specifies a name for the Model 281xSA hub.

  • Page 104: Boot Parameters Menu

    [Toggle boot mode] Shifts the boot mode between Network and NVRAM. The factory default setting is Network. When Network is selected, the Model 281xSA hub tries to acquire its configuration over the network, using the protocol specified by the p command [Toggle boot protocol].
  • Page 105 IPX, and IP_IPX. The factory default setting is Auto. NOTE: If m [Toggle boot mode] is set to NVRAM, this parameter is ignored. When Auto is selected, the Model 281xSA hub tries to find its IP or IPX configuration parameters over the network. This process has two stages: First the Model 281xSA hub seeks the IP parameters and configuration file from a BootP server, transfers the...
  • Page 106 Configuring the Model 281xSA Hub for IP/IPX Networks When IPX is selected, the Model 281xSA hub looks for a Novell server or router from which it can obtain the IPX network number. If no server or router responds, the Model 281xSA hub returns to the Boot main menu.
  • Page 107 file from onboard local flash EPROM. When you set the image load mode to Local, the boot mode setting is no longer important (that is, the Model 281xSA hub performs only a local load of the image file). NOTE: If the local image file is corrupted, you are not allowed to set the image load mode to Local.
  • Page 108 [none], enter 0.0.0.0. [Set image file name] Up to 64 ASCII characters. Identifies the pathname and filename specifying the Model 281xSA hub image file to be loaded. The string format is specific to the operating system used by the TFTP server. For example, if the TFTP server is an MS-DOS-based implementation, a sample string can be: c:\tftpboot\281xSA.img...

  • Page 109: Appendix A Technical Specifications

    Appendix A Technical Specifications This appendix provides technical specifications for the Model 281xSA Ethernet Hub. Network Protocol 10 Mb/s Manchester encoded (IEEE 802.3 CSMA/CD) Standards Support IEEE 802.3i Type 10BASE-T IEEE 802.3 10BASE-FL draft standard Electrical Specifications Input power: 40 W...
  • Page 110 Technical Specifications Electromagnetic Emissions Meets requirements of: FCC Part 15, Subparts A and B, Class A EN 55 022 (CISPR 22:1985), Class B General License VDE 0871, Class B (AmtsblVfg No. 243/1991 and Vfg 46/1992) VCCI Class 1 ITE Safety Agency Approvals UL-listed CSA-certified TUV-licensed...

  • Page 111: Appendix B Leds And Switches

    Appendix B LEDs and Switches This appendix describes the LEDs and switches on the Model 281xSA Ethernet Hubs. Figure B-1 shows the Model 2813SA Ethernet Hub front panel. Expansion On Line µP Fault Reset System Operation RS-232 Service Port Power...

  • Page 112: Table B-1. Model 281Xsa Hub Leds

    Stretched LED lights for 140 ms indicating a collision in the hub. Isolate Amber Host portion of the Model 281xSA hub has been partitioned (isolated) by SNMP network management from the extended Model 281xSA “backplane.” These 16 ports of the Model 281xSA hub continue to function as their own 16-port Ethernet segment.

  • Page 113: Table B-2. Model 281Xsa Hub Μp Fault And On Line Led

    Operation On Line Green Flashes when the Model 281xSA hub has not LEDs yet started to execute the run-time image software code. This LED lights to indicate that the download (or local load) has succeeded and has begun to execute the run-time image.

  • Page 114: Reset Button

    Figure B-3. Reset button MDI-X/MDI Switch Model 281xSA hubs allow you to configure port 1 as an MDI or MDI-X port. Media dependent interface (MDI) is specified by the IEEE 802.3i 10BASE-T Standard to be the electrical and mechanical interface to the UTP wire. An MDI...

  • Page 115: Figure B-4. Internal Crossover Function

    MDI-X/MDI Switch For two 10BASE-T devices to communicate, the transmitter of each device must connect to the receiver of the other device. The reversal of the transmit and receive assignments is called a crossover function. Every 10BASE-T link segment requires a crossover function, and it can be implemented in one of two ways: Internally, designed as part of the circuitry in the 10BASE-T device (see Figure B-4)

  • Page 116: Figure B-6. Mdi-X/Mdi Switch

    UTP cable to connect MDI ports to MDI-X ports. 10BASE-T transceivers are implemented as MDI ports, and 10BASE-T repeaters (for example, ports 2 through 16 of the Model 281xSA hubs) have MDI-X ports. The Model 281xSA hub configures ports 2 through 16 as MDI-X ports, while port 1 can be configured as either MDI or MDI-X through the MDI-X/MDI...

  • Page 117: Appendix C Pin Assignments

    Appendix C Pin Assignments This appendix lists the pin assignments for the connectors on Model 281xSA Ethernet Hubs and describes how to use the RS-232 port for making out-of- band connections. AUI Port Table C-1 shows the pin assignments for the DB-15 connector on the AUI port on the Model 281xSA hub.

  • Page 118: 10Base-T Ports

    Not used by 10BASE-T Not used by 10BASE-T Not used by 10BASE-T RS-232 Port Table C-3 shows the pin assignments for the RS-232 port on the Model 281xSA hub. Table C-3. RS-232 interface port pin assignments (DB-25 plug) Connector Pin # Function...

  • Page 119: Using The Rs-232 Serial Port For An Out-Of-Band Connection

    Using the RS-232 Serial Port for an Out-of-band Connection Using the RS-232 Serial Port for an Out-of-band Connection The RS-232 serial communications port on the Model 281xSA hub can be used for an out-of-band connection to the telephone voice network through an external modem.

  • Page 120: Service Port

    Pin Assignments Service Port Table C-4 shows the pin assignments for the service port on the Model 281xSA hub. Table C-4. Service port pin assignments (DB-9 plug) Connector Pin # Function Direction DB-9 Transmit data from Model 281xSA hub Receive data...

  • Page 121: Appendix D Link Integrity Test Function

    LED goes out to indicate no link status. While there is no link integrity, the Model 281xSA hub port does not send data to the UTP wire, and the port receiver does not forward data from the UTP wire to the concentrator until link integrity is restored.

  • Page 122: Appendix E Autopolarity Detection And Correction

    The Model 281xSA hub ports monitor the polarity of the receive data wire-pair only during the power-up sequence or while the Model 281xSA hub port has no link status (Link LED OFF). While a port is being monitored, two conditions...

  • Page 123: Appendix F Ip Addressing

    Appendix F IP Addressing The official description of Internet addresses is RFC 1166, Internet Numbers. The DDN Network Information Center (NIC) at SRI International in Menlo Park, California, maintains and distributes the RFC documents. The NIC also assigns Internet addresses and network numbers. When an organization applies to the NIC, the NIC assigns a network number or range of addresses that is appropriate to the number of host devices on the network.

  • Page 124: Internet Address Notation

    IP Addressing The Class C Internet address format (see Figure F-3) uses the highest 24 bits as the network field and sets the three highest-order bits to 1,1,0. The remaining eight bits form the host field. More than two million Class C networks can exist, and each Class C network can have up to 255 hosts.

  • Page 125: Allowable Internet Addresses

    Allowable Internet Addresses Allowable Internet Addresses Some Internet addresses are reserved for special uses and cannot be used for host, subnet, or network addresses. Table F-1 lists ranges of Internet addresses and shows which addresses are reserved and which are currently available. Table F-1.

  • Page 126: Addresses And Routing

    IP Addressing Addresses and Routing Addresses make it possible to route and deliver data packets. For example, when a host sends an Internet data packet to a destination host on the same network, the packet goes directly to the destination host. If the destination host and sending host are on different networks, the packet goes to a router.

  • Page 127: Subnetting And Routing

    Subnetting Subnetting and Routing Routers and hosts can use the subnet field for routing. The rules for routing on subnets are the same as those for routing on networks. However, correct routing requires all subnets of a network to be physically contiguous. In other words, the network must be set up so that it does not require traffic between any two subnets to cross another network.

  • Page 128: Appendix G Setting Up The Model 281Xsa Hub Configuration File

    You can modify the sample file for your own use by uncommenting the appropriate keyword lines and specifying the parameter values. CAUTION: Before you edit a Model 281xSA hub configuration file, make a backup copy of the file for reference.
  • Page 129 Setting Up the Model 281xSA Hub Configuration File The sample configuration file 281sa100.cfg looks like this: # Specify file name for the NMM image file. NOTE this has to be the # first un-commented line in this file for the NMM to load properly.

  • Page 130: Sample Configuration File

    Sample Configuration File # Enter the NMM initialization string used for out-of-band # communication. # For example: #initialization-string ATDT,9,1,415-555-1212 # Specify the concentrator's location (64 characters max.). # For example: #location Building A # Specify the concentrator's name (64 characters max.). # For example: #sysname concA.abcCompany.com # Specify the name &...
  • Page 131 Setting Up the Model 281xSA Hub Configuration File # Enable or disable the use of authentication traps. Valid entries are # on and off. Default is on. # For example: #authentication-traps on # Specify the image load mode for this NMM.
  • Page 132 Sample Configuration File # Specify the lifetime of a traffic matrix entry in seconds. # Maximum number is 42,949,672 seconds (approximate 497 days). # Default is 1200 seconds. # For example: #trflife 1200 # Specify how many nodes are allowed to associate with a particular # port.
  • Page 133 # For example: #security-config-lock off # Add an entry to the threshold table. # Format of the command: # threshold IN OB SL PO TY CN SV AC DU # IN = index, for 281xSA from 1 to 160, inclusive 893-743-A...
  • Page 134 Threshold is set for a port # SL = slot number, for 281xSA concentrator from 1 to 5, inclusive # PO = port number, from 1 to 17, inclusive # TY = type, which is one of the following:...
  • Page 135 Setting Up the Model 281xSA Hub Configuration File # DU = Duration in seconds of period during which threshold is monitored. The duration is in multiples of 10 seconds. # Sample threshold table entries: # This sample threshold table entry is number 6 in the table.

  • Page 136: Configuration Parameters

    These are the configuration file parameters: filename or drive:\directory\filename The pathname and filename for the Model 281xSA hub image file. This parameter must be the first uncommented line in the configuration file. You may include the drive as part of the path.
  • Page 137 The address of the router for this hub’s TFTP request. ping router on|off Enables or disables the ability of the Model 281xSA hub to issue an Internet Control Message Protocol (ICMP) echo, (ping) to the available default routers. Valid entries are off and on. Default setting is on.
  • Page 138 Configuration Parameters initialization-string string The initialization string the Model 281xSA hub uses for out-of-band communication (64 alphanumeric characters maximum). This is the string of characters that a management station dials to establish an out-of-band connection if there is an interruption in normal network communication. If the configuration file contains no entry for this parameter, the default is...
  • Page 139 file, the default is on (enabled). image-load-mode remote-only|local-only|remote-with-local-backup Specifies the image load mode for this hub. For a detailed description, see Chapter 4, “Configuring the Model 281xSA Hub for IP/IPX Networks.” config-load-mode remote-only|local-only|remote-with-local-backup Specifies the configuration load mode for this hub. For a detailed description, see “Boot Configuration Commands”...
  • Page 140 Chapter 4, “Configuring the Model 281xSA Hub for IP/IPX Networks.” save-to-eeprom Instructs the Model 281xSA hub to save the current configuration data to EEPROM during the boot time. If the configuration file contains no entry for this parameter, the default is no save.
  • Page 141 When this keyword is set on, you cannot change Allowed Nodes settings through the network management user interface unless you change the configuration setting through a connection to the Model 281xSA hub service port. Valid choices are on and off. The default is off. G-14...
  • Page 142 Configuration Parameters threshold IN OB SL PO TY CN SV AC DU Adds an entry to the threshold table. For a complete discussion of thresholds and threshold table entries, see the publications that came with your network management software. The fields for this parameter are: IN = Index number, from 1 to 160, inclusive.
  • Page 143 Setting Up the Model 281xSA Hub Configuration File hello-message on|off Enables or disables the automatic network topology buildup, by enabling or disabling the concentrator’s “hello message.” Valid choices are on and off. The default is on. rmon-max-host xxx Specifies the maximum number of hosts that will be collected by the agent on an interface on behalf of each RMON hostControlEntry in the RMON host group.

  • Page 144: Appendix H System Messages

    Model 281xSA hub service port System Operation Display Messages The front panel of the Model 281xSA hub features a four-character alphanumeric display that indicates operational status as the hub is booting and running. Table H-1 shows the messages and their meanings.

  • Page 145: Service Port Boot Messages

    Service Port Boot Messages The messages listed in this section are associated with conditions that occur while the Model 281xSA hub is booting or while you are using the boot configuration menus to change boot configuration parameter values. You should only see these messages before the Model 281xSA hub image code is loaded.
  • Page 146 Service Port Boot Messages BOOTP Image file name too long! Maximum file length 128 chars, actual length [integer] chars. You have entered an image filename that is too long. The Model 281xSA hub allows only a 128-character name. BOOTP timed out! The Model 281xSA hub sent eight BootP requests at two-minute intervals and received no reply.
  • Page 147 TFTP error received from remote host! Remote Error: [string from server]. The boot server sent an error message to the Model 281xSA hub firmware. A typical remote error would be “File not found.” Timed out trying to TFTP! Either the Model 281xSA hub tried to open the TFTP connection eight times, or more than two minutes passed between packets inside a TFTP transmission.

  • Page 148: Memory Error Messages

    The configuration data in the NVRAM has been corrupted, which can happen if power fails at the instant the configuration is being saved. The Model 281xSA hub will try to rewrite the NVRAM to factory default settings. If it succeeds, continue to use the NMM.

  • Page 149: Service Port Run-Time Messages

    The messages listed in this section are associated with conditions that occur while you are using the run-time configuration menus to change configuration parameter values. You should see these messages only after the Model 281xSA hub image code has loaded.

  • Page 150: Configuration File Messages

    The messages in this section are associated with conditions that occur while you are using the downloaded agent configuration file to change configuration parameter values. You should see these messages only after the Model 281xSA hub image code has loaded.
  • Page 151 System Messages trflife max-nodes-per-port When this error message contains the keyword threshold in place of xxxxx, the message indicates that no entry will be created in the threshold table. bad IP address xxxx An incorrect IP address is specified as a parameter to one of the following keywords: netmask primary-default-router...
  • Page 152 Configuration File Messages hello-message Unknown argument, xxxx, ignored. You have entered a parameter value other than on or off (the only valid parameters) for this keyword. The system will use the default value (on) for this keyword. Illegal hello timer xxxx The timer value contains non-numeric characters.
  • Page 153 System Messages Segment number has to be hexadecimal number. You have specified an IPX network number in an incorrect form. Only hexadecimal digits are allowed. trap-interval Unknown argument, xxxxx, ignored. You have entered a parameter value other than those allowed for this keyword. The system will use the default value for the specified keyword.

  • Page 154: Appendix I Replacing Simms

    Appendix I Replacing SIMMs Model 281xSA dynamic random access memory (DRAM) can be upgraded from the default 2-megabyte (MB) configuration to a total of 8 MB. The DRAM consists of a single in-line memory module (SIMM) that is installed in a SIMM socket on a printed circuit board inside the hub.

  • Page 155: Preparation

    Replacing SIMMs Preparation Before you begin installing the SIMMs, make sure you have the necessary tools and equipment. Follow the instructions under “Preparatory Steps” to prepare the hub for the installation procedure. Tools and Equipment You will need the following tools and equipment during the installation procedure: A #2 Phillips screwdriver for removing the rack-mounting screws if the hub is rack mounted...

  • Page 156: Removing The Cover

    Removing the Cover To gain access to the SIMM socket, you must remove the cover from the Model 281xSA hub. To remove the cover, follow these steps: Using the #1 Phillips screwdriver, remove 3 screws from each side and 6 screws from the rear of the hub (see Figure I-1).

  • Page 157: Figure I-2. Removing The Hub Cover

    Replacing SIMMs Holding the sides of the cover, slide the cover toward the rear of the hub approximately 1/2 inch (see Figure I-2). E X P A N S IO N E X P A N S IO N E X P A N S IO N E X P...

  • Page 158: Replacing The Simm

    You need to remove the SIMM already installed on the board before installing a new SIMM. Model 281xSA hubs use 72-pin SIMMs. SIMM capacity is a function of the number and type of memory devices on the SIMM.

  • Page 159: Figure I-3. Simm Location

    Replacing SIMMs Total memory varies and depends on the type of SIMM installed. To replace the SIMM, follow these steps: Locate the SIMM socket at location U21 on the circuit board. Locate socket U21 (see Figure I-3). Socket U21 is a “tilt-down” SIMM socket—you insert the SIMM into the empty socket vertically and then tilt the SIMM back until it snaps into the socket.

  • Page 160: Figure I-4. Removing A Simm

    Replacing the SIMM Guide notch Pull tabs outward and SIMM forward. Remove SIMM at 90° angle. Pull up. 4820 Figure I-4. Removing a SIMM a. Push gently outward on the spring latch at each end of the SIMM. When you release the SIMM from the spring latches, the SIMM ejects from the locking studs on the socket and can be easily removed.

  • Page 161: Figure I-5. Installing A Simm

    Replacing SIMMs When you install the replacement SIMM, the guide notch must match the position and alignment of the guide notch on the SIMM you removed. d. Place the removed SIMM in an antistatic bag, or set it on an antistatic mat.
  • Page 162 This test is turned off by default. You should turn this test on to check the newly installed memory. For information on activating this self-test, see “Boot Configuration Menus” in Chapter 4, “Configuring the Model 281xSA Hub for IP/IPX Networks.” 893-743-A...

  • Page 163: Setting Jumpers

    Replacing SIMMs Setting Jumpers When you have finished installing the new SIMM, you must set the DRAM configuration jumpers (see Figure I-6) to match the amount of memory on the SIMM. Front of hub Options 4858 Figure I-6. DRAM jumpers Set the jumpers at locations JP1 and JP2 to match the memory configuration you have installed, as shown in Table I-2.

  • Page 164: Reinstalling The Cover

    When you have installed the SIMM and set the jumpers, you must reinstall the cover on the Model 281xSA hub. To reinstall the cover, follow these steps: Set the cover over the top of the hub, making sure the back edge of the cover clears the expansion ports on the rear panel of the hub (see Figure I-7).

  • Page 165: Final Steps

    Chapter 2, “Installing the Model 281xSA Hub.” To verify correct hub operation, follow these steps: Connect the power cord, first to the Model 281xSA hub and then to a power outlet. Turn on the power to the hub.

  • Page 166: Figure 4-12. Boot File Configuration Menu

    Index Symbols BootP server configuration process <Data> LED 4-23 IP address µP Fault LED 4-8, B-3 searching for 4-11 with IPX management Numerics brackets, rack-mounting 3-18 10BASE-FL port 1-2, 3-7 10BASE-T-to-Type 1 adapter cable 3-16 4-36, 4-38 Add a receiver command 3-12, 3-13 expansion 1-4, 1-5...

  • Page 167: Figure 4-11. System Configuration Menu

    Load and execute boot files Set secondary default router's IP 4-20 4-33 Perform power-up boot load sequence address 4-29 4-42 Reset 281xSA Set security level 4-19 4-28, 4-41 Reset management module Set security parameters 4-19 4-23 Reset NVRAM to factory defaults...

  • Page 168: Figure 4-19. Ipx Parameters Menu

    4-28 Exit command 4-23 boot router 3-12, 3-13 expansion cables 4-23 BootP server expansion connections 4-25 Model 281xSA hub 1-3, 3-2 expansion ports 4-18 stored in NVRAM 3-13, B-2 Expansion Status LED 4-24 IP Configuration menu 4-20, 4-24 IP configuration menu command...

  • Page 169: Figure 4-16. Protocol Parameters Menu

    B-1–B-3 description 4-33 IPX Parameters menu 3-13, B-2 Expansion Status 4-37 IPX SNMP Trap Receivers menu Fault 4-27 Model 281xSA main menu Isolate 4-40 Out-of-Band Parameters menu Link 4-43 Profile Parameters menu D-1, E-1 indicating link status 4-29 Protocol Parameters menu...
  • Page 170 4-40 Out-of-Band Parameters menu site 4-40 out-of-band parameters, setting tools wall installation 4-29 Reset 281xSA command 4-12 parameters, run-time 1-2, B-4 Reset button Part LED 4-19 Reset management module command Partition LED Reset NVRAM to factory defaults...

  • Page 171: Figure B-3. Reset Button

    Set my IP address command MDI-X/MDI 4-43 Set name command Reset button 4-26, 4-34 Set network number command System 3000 products, using with Model 281xSA 4-28, 4-40 3-20 Set out-of-band parameters command hubs 4-28, 4-43 4-21 Set profile parameters command...
  • Page 172 4-18, Toggle image load mode command 4-46 wall installation 4-18, Toggle management protocol command 2-11 preparing for 4-30 required materials Toggle security configuration lock 2-10 wall-mounting brackets, installing 4-42 command workgroups tools, required 4-20, Write boot config to NVRAM command transceiver 4-24, 4-26 3-4–3-6...

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