3Com PS Hub 40 User Manual
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3Com PS Hub 40 User Manual

3Com PS Hub 40 User Manual

3com superstack ii ps hub user guide 3c16405-ps hub 40 12-port, ps hub 40 24-port-3c16406, ps hub 50 24-port-3c16450
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http://www.3com.com/
Part No. DUA1640-5AAA02
Published July 1997
SuperStack

User Guide

3C16405 — PS Hub 40 12-port
3C16406 — PS Hub 40 24-port
3C16450 — PS Hub 50 24-port
®
II PS Hub

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  • Page 1: User Guide

    SuperStack ® User Guide 3C16405 — PS Hub 40 12-port 3C16406 — PS Hub 40 24-port 3C16450 — PS Hub 50 24-port http://www.3com.com/ Part No. DUA1640-5AAA02 Published July 1997 ® II PS Hub...
  • Page 2 Other brand and product names may be registered trademarks or trademarks of their respective holders. Environmental Statement It is 3Com’s policy to be environmentally friendly in all its operations. This manual is printed on paper that comes from sustainable, managed European forests. The production process for making the pulp has a reduced AOX level (adsorbable organic halogen) resulting in elemental chlorine free paper.

  • Page 3: Table Of Contents

    Expanding an Existing Network Migrating to Higher Performance Workgroups What Are Workgroups? Segments and Port Switching Workgroup Example PS H OW THE Overview PS Hub 40 PS Hub 50 Segment Switch PS Hub 50 Transceiver Module Slot NFORMATION ÉCURITÉ MPORTANTE 1-11 IFFER...
  • Page 4 Using Cascade Cables 3-14 Using Hot Swap Cascade Units 3-17 3-17 ALANCING How Does Load Balancing Work? Using an External Switch PS H ANAGING THE Command Line Interface Web Interface SNMP Network Management Requirements for Managing Over the Network IP Addresses...
  • Page 5 Command Line Interface (CLI) Through the Console Port Over the Network Web Interface 5-12 Through the Console Port Over the Network Which Web Browsers are Supported? Quick Config Manager Through the Console Port Over the Network SING THE OMMAND Accessing the CLI Initial Access Logging On Logging Off...
  • Page 6 Exiting the Web Interface 7-10 Unit View 7-10 Unit Status 7-11 Management Address 7-12 Port Setup 7-13 Console Port Configuration Segment Configuration 7-15 Switch Configuration 7-16 Permanent Address Management Documentation 7-17 Getting Started 7-18 Password Setting 7-19 System Name 7-19 7-20 Initialize...
  • Page 7 Windows NT only) Quick Config Manager Window Map Accessing the Stack Giving the Stack an IP Address Viewing the Stack B-12 Configuring Segments Configuring the Segment Switch Load Balancing B-18 Menus B-19 Changing the Community Name Viewing Current Utilization Viewing Utilization History...
  • Page 8 Support from 3Com Returning Products for Repair NDEX EMC S viii ERIAL TILITY GENT PGRADE TILITY ECHNICAL UPPORT World Wide Web Site 3Com Bulletin Board Service 3ComFacts Automated Fax Service 3ComForum on CompuServe Online Service LOSSARY ORPORATION IMITED TATEMENTS ARRANTY...

  • Page 9: Important Safety Information

    MPORTANT NFORMATION WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully. Please read the following safety information thoroughly before installing the PS Hub. Installation and removal of the unit must be carried out by qualified personnel only.
  • Page 10 Sockets for Redundant Power System (RPS): Only connect a 3Com Redundant Power System to this socket. For details, follow the installation instructions in the manuals accompanying the Redundant...

  • Page 11: L'information De Sécurité Importante

    L’ INFORMATION DE MPORTANTE AVERTISSEMENT: Les avertissements contiennent les directions que vous devez suivre pour votre sécurité personnelle. Suivez toutes les directives avec soin. Veuillez lire à fond l'information de la sécurité suivante avant d'installer le PS Hub. L'installation et l'enlèvement de l'unité doivent être faits seulement par le personnel qualifié.
  • Page 12 être branchés à ces prises de courant de données. Socle Pour Alimentation Multiple: Brancher seulement une alimentation multiple de 3Com à cet socle. Suivre pour les détails les directives de l’installation dans le manual qui accompagne l’alimentation multiple.

  • Page 13: Wichtige Sicherheitshinweise

    ICHTIGE ICHERHEITSHINWEISE WARNUNG: Warnungen enthalten Anweisungen, die zur eigenen Sicherheit unbedingt zu beachten sind. Bitte befolgen Sie alle Anweisungen sorgfältig und genau. Bitte unbedingt vor dem Einbauen des PS Hub Einheit die folgenden Sicherheitsanweisungen durchlesen. Ein- und Ausbau des Gerätes ist nur von Fachpersonal vorzunehmen. Das Gerät an geerdete Stromversorgung anschließen, um eine Übereinstimmung mit den europäischen Sicherheitsbestimmungen zu gewährleisten.
  • Page 14 Steckdose Für Redundant Power System: Nur ein 3Com Redundant Power System an diese Steckdose anschließen. Für weitere Angaben die genauen Einbauanweisungen im Handbuch zum Redundant Power System befolgen. Die Einheit ist unter keinen Umständen an einen Wechselstrom Netzstecker (A.C.) anzuschließen, wenn dieser keine Erdung hat.

  • Page 15: About This Guide

    PS Hub 40 and PS Hub 50 are different; refer to Chapter 2. When referring to both the PS Hub 40 and PS Hub 50 generally, this guide uses the term ‘PS Hub’.

  • Page 16: How To Use This Guide

    This Guide If you are looking for... An introduction to the hub, workgrouping and segments Information on how the PS Hub 40 and PS Hub 50 are different from each other Information on installing and using the hub An introduction to load balancing and how it works...
  • Page 17 Text Conventions Table 2 Convention Description The word ‘syntax’ means you must evaluate the syntax Syntax provided and supply the appropriate values. Placeholders for values you must supply appear in angle brackets. Example: Change the password by using the following syntax: password <string>...
  • Page 18 BOUT UIDE...

  • Page 19: About The Ps Hub

    It can be used to build a small network or to expand a larger, more established network. Figure 1-1 The PS Hub is part of 3Com’s SuperStack II PS Hub range, which incorporates many of the features from the successful SuperStack II range. SuperStack II products can be combined to create a network that can change and grow with your networking needs.

  • Page 20: Features

    HAPTER BOUT THE Features The PS Hub 40 and PS Hub 50 share many features: NOTE: These terms and features are described in this chapter and the following chapters. 12 or 24 shielded twisted pair ports for easy connection to 10BASE-T networks.
  • Page 21 A web interface for comprehensive management of the hub using any suitable web browser. Additional management software (supplied on the CD-ROM), including 3Com’s Transcend ® ® Windows An implementation of SNMP for management over the network, using the IP protocol.

  • Page 22: How You Can Use The Ps Hub

    Figure 1-2 When your network grows, you can expand it easily by adding more PS Hubs. The PS Hub also has an MDI/MDIX switch which enables your network to expand further by connecting to other types of hubs, stacks and networking equipment, as shown in Figure 1-3.

  • Page 23: Expanding An Existing Network

    Figure 1-4 shows how PS Hubs can be added to an existing network (the network is a stack of SuperStack The hubs create more ports now, and allow for further growth in the future. The PS Hubs are connected to a switch so that communication between them is controlled. Figure 1-4...

  • Page 24: Migrating To Higher Performance

    100BASE-TX or 100BASE-FX. This allows you to connect to 100Mbps networks or network equipment, for example a server. For information on the differences between the PS Hub 40 and the PS Hub 50, refer to Chapter 2. Figure 1-5...

  • Page 25: Workgroups

    Workgroups An important feature of the PS Hub is that you can create workgroups. A good way to organize your network is to neatly group your users in What Are a logical way, called workgroups. For example, if your office consists of Workgroups? four departments, you can mirror this by having four workgroups, as shown in Figure 1-6.

  • Page 26: Segments And Port Switching

    The PS Hub has four separate internal repeaters (called segments) Port Switching which you can use to create your workgroups. You can switch the hub’s ports to any of these segments (called port switching). With the segments and port switching, you can easily create your workgroups.
  • Page 27 The ability to configure the segments allows you to create flexible workgroups, as shown in Figure 1-9, which can change and grow with your needs. DUA1640-5AAA02 Internal Segments Connect and isolate the segments from their associated cascaded segments. Switch the ports between the segments (port switching). Workgroups...
  • Page 28 This has many benefits: Workgroups You can move users between segments easily — You simply switch the ports between the segments, as necessary, using management. The segments are carried throughout the stack — You can add hubs, when necessary, to extend the existing cascaded segments.
  • Page 29 Workgroups 1-11 There is extra security — Hub segments can be isolated from the cascaded segments, so that only workstations on the same hub segment can communicate with each other. Port switching enables you to extend any existing workgroups you may have, across the whole network infrastructure, including shared Ethernet workgroups.

  • Page 30: Workgroup Example

    1-12 1: A PS H HAPTER BOUT THE Workgroup Example This example shows how a stack of three PS Hubs can easily create a network with the desired workgroups. Table 1-1 shows how the users are grouped: Table 1-1 Middle Bottom Figure 1-10 shows how the required workgroups are created using a stack of PS Hubs.
  • Page 31 Hub affected Bottom Bottom Workgroup Example After Changes Workgroups 1-13 Action to implement change Reconnect segment 1 to cascaded segment 1 Switch ports for R, S and T to segment 3 Switch new ports for U and V to segment 2...
  • Page 32 For information on the PS Hub 50, refer to “PS Hub 50” on page 2-2. For information on the segment switch in the PS Hub 50, refer to “Segment Switch” on page 2-2.

  • Page 33: How The Ps Hubs Differ

    This chapter contains the following topics: Overview This chapter describes how the PS Hub 40 and PS Hub 50 are different. However, they are both part of the PS Hub family and have many similar features. For information on these common features, refer to “Features”...

  • Page 34: Ps Hub 40

    “Using Transceiver Modules” on page 3-12. PS Hub 50 The main feature of the PS Hub 50 over the PS Hub 40 is that it has an internal segment switch. The segment switch is an additional part of the PS Hub 50 which links Segment Switch the stack’s four cascaded segments.
  • Page 35 An example of a MAC address is ‘08004e0849d1’. Using the source addresses, the PS Hub 50 unit’s segment switch can learn which workstations are connected to each of the cascaded segments. This information is stored in a switching database, which is a list containing each source address together with the associated cascaded segment.
  • Page 36 This is to reduce the possibility of loops in the stack. If a PS Hub 50 is removed from the stack or fails, the other hubs reconfigure themselves.
  • Page 37 Both transceiver modules have a connection and appear to be equal, so the bottom unit’s segment is the active segment switch (and that transceiver module is used). If the connection to the bottom unit’s transceiver module fails, the stack reconfigures so that the top unit’s segment switch becomes the active segment switch.

  • Page 38: Ps Hub 50 Transceiver Module Slot

    HAPTER OW THE PS Hub 50 The PS Hub 50 unit’s transceiver module can be fitted with a 3Com Transceiver Module 10Mbps or 100Mbps transceiver module. The operation of the transceiver module slot differs when using either a 10Mbps or...
  • Page 39 Using a 100Mbps Transceiver Module When a 100Mbps transceiver module is used, the PS Hub 50 automatically connects it to the hub’s internal segment switch, as shown in Figure 2-4. Figure 2-4 Using a 100Mbps transceiver module to provide a 100Mbps network...
  • Page 40 2: H PS H HAPTER OW THE IFFER DUA1640-5AAA02...

  • Page 41: Using The Ps Hub

    This chapter contains the following topics: LEDs and Ports Figure 3-1 (over the page) shows the hub’s diagnostic LEDs and easy to use ports. This diagram also appears on the Quick Reference Guide. The LEDs: The different types of ports are used for: CAUTION: Only connect a SuperStack the Redundant Power System socket.
  • Page 42 3: U PS H HAPTER SING THE The LEDs and Ports (the PS Hub 40 is shown) Figure 3-1 DUA1640-5AAA02...
  • Page 43 LEDs and Ports DUA1640-5AAA02...

  • Page 44: Before You Start

    Four standard height and two reduced height self-adhesive rubber feet Two mounting brackets and four screws Four self-adhesive labels One CD-ROM featuring: The 3Com serial web utility (SLIP driver for Windows ‘95) An agent upgrade utility ® Transcend Quick Configuration Manager for Windows Transcend ®...
  • Page 45 Connecting PS Hubs (Stacking) To connect another PS Hub 40 or PS Hub 50 to your hub using the cascade ports, you need: Cascade cables have resilience built into them which protects the internal segments and management communication that is carried between the hubs in the stack.

  • Page 46: Positioning The Ps Hub

    3: U PS H HAPTER SING THE Positioning the When installing your PS Hub, ensure that: PS Hub Using the Rubber Four standard height and two reduced height self-adhesive rubber feet Feet are supplied with the hub. Do not apply the feet if you intend to rack or wall mount the hub. Usage of the feet depends on where the PS Hub is placed: CAUTION: If the hub is to be part of a free standing stack, apply the feet to each marked corner area on the underside of the hub.

  • Page 47: Using The Labels

    Using the Labels A sheet of four labels is supplied with the hub. Some labels have already been attached to the hub. The labels on the bottom of the hub show: The labels on the rear of the hub show: The four labels left on the sheet are for you to use as necessary.

  • Page 48: Rack And Wall Mounting

    3: U PS H HAPTER SING THE Rack and Wall Two mounting brackets and four screws are supplied with the hub. Mounting These are used for rack mounting and wall mounting the hub. CAUTION: Disconnect all cables from the hub(s) before continuing. Remove the self-adhesive rubber feet from the underside of the hub, if already fitted.

  • Page 49: Wall Mounting

    Wall Mounting You can wall mount up to two hubs. To fit the brackets to one hub, for wall mounting: 1 Place the hub the right way up on a hard, flat surface with the front facing towards you. 2 Locate a mounting bracket over the mounting holes on one side of the hub, as shown in Figure 3-3.
  • Page 50 3-10 3: U PS H HAPTER SING THE Figure 3-4 3 Insert the three screws and fully tighten with a suitable screwdriver. 4 Repeat the two previous steps for the other side of the hubs. To wall mount the hub(s): 1 Ensure that the wall you are going to use is smooth, flat, dry and sturdy.

  • Page 51: Connecting Workstations To Your Hub

    ‘x’. This denotes a crossover in the port’s internal wiring, for example 1x, 2x, 3x... If you are using the last port (port 12 or 24) to connect a workstation, ensure the MDI/MDIX switch is set to MDIX. DUA1640-5AAA02 Connecting Workstations to Your Hub...

  • Page 52: Using Transceiver Modules

    You can increase the number of ports in your network by connecting PS Hubs Together additional PS Hub 40 and PS Hub 50 units to your hub, to form a stack (Stacking) (this process is called stacking). The four cascaded segments are carried through the stack, enabling you to switch the ports on all of the hubs between the four segments.

  • Page 53: About Cascade Cables

    Hot Swap Cascade Units You can increase the resilience of the stack by using 3Com Hot Swap Cascade Units (3C16430) with the cascade cables. These units can be fitted to any PS Hub and provide total hot swap functionality.

  • Page 54: Using Cascade Cables

    3-14 3: U PS H HAPTER SING THE Using Cascade Cables To connect PS Hubs together, using Cascade cables: 1 Position the units as required; rack mounting or wall mounting them as necessary. 2 Starting with the bottom unit, using a cascade cable: Secure the cable in place by tightening its captive screws as tight as possible by hand.

  • Page 55: Using Hot Swap Cascade Units

    Using Hot Swap To connect PS Hubs together, using Hot Swap Cascade Units: Cascade Units 1 Position the units as required; rack mounting or wall mounting them as necessary. 2 Connect the Hot Swap Cascade Units with cascade cables: Secure the cables by tightening the cables’ captive screws as tight as possible by hand.

  • Page 56: Connecting Different Hubs And Stacks To Your Hub

    A ‘Straight-through’ cable is used, and one of the SuperStack II Hub 10 unit’s crossed (MDIX) ports is connected to port 24 on the PS Hub (note that the MDI/MDIX switch is IN, so the port is uncrossed). You can use ‘Straight-through’ 10BASE-T cable to connect a crossover (MDIX) port to an uncrossed (MDI) port.

  • Page 57: Powering On The Units

    Figure 3-7 Switch Powering On the When you have connected all of your equipment together, you are Units ready to use your network. You can power on the unit or the units in the stack in any order, and can make your port connections at any time. After powering on the hub, its Power/Self Test LED flashes for a few seconds while the hub performs its self test.
  • Page 58 3-18 3: U PS H HAPTER SING THE DUA1640-5AAA02...

  • Page 59: Load Balancing

    For load balancing to work properly, there must be either: ALANCING An overview of load balancing How load balancing works A PS Hub 50 in the stack A switch connected to the hubs in the stack...

  • Page 60: How Does Load Balancing Work

    1 The PS Hubs work out which internal segments and cascaded segments are connected by a switch (either through the PS Hub 50 unit’s segment switch or an external switch). It does this because the load balancing feature will only move ports between segments that they currently communicate with (so that no workstations become isolated).

  • Page 61: Using An External Switch

    PS Hubs is to use a PS Hub 50. However, if you want to connect two or Switch more segments using an external switch, you must connect the switch to the PS Hub’s 10BASE-T or transceiver module ports and then port switch those ports to the relevant segments.
  • Page 62 4: L HAPTER ALANCING DUA1640-5AAA02...

  • Page 63: Managing The Ps Hub

    This chapter contains the following topics: Introduction Network management is not required to make the PS Hub work, but allows you to change the way it works and to monitor what is happening to the segments and the rest of the network. There are many features that can improve the operation of the hub or stack.

  • Page 64: Why Manage Your Stack

    Display general information for the stack or hubs. Graphically display network information for the stack’s cascaded segments. Enable and disable ports, and switch them between segments. Perform load balancing so that the traffic is distributed evenly across the segments in the stack, resulting in more efficient segments.

  • Page 65: How You Can Manage Your Stack

    How You Can A stack of PS Hubs is treated as a single manageable entity, and the Manage Your Stack management is distributed. Any network address information (IP information) that you configure for a hub, can be used to access the stack.

  • Page 66: Snmp Network Management

    3Com produces a range of powerful graphical SNMP network management applications (for example Transcend Enterprise Manager for Windows) that give you total control over your entire 3Com network from a single management station. Using intelligent 3Com software distributed throughout the network, 3Com’s Transcend management applications support all of today’s...

  • Page 67: Methods Of Management

    Methods of There are many ways you can connect your management station to the Management stack, as shown in Figure 5-1. You can manage the stack: If you are going to manage the stack over the network, the quickest way to set it up with the necessary network information is to connect to one of the PS Hubs locally and use the CLI.

  • Page 68: Requirements For Managing Over The Network

    1. You can manage a mixed stack of PS Hub 40 and PS Hub 50 units. If you have multiple PS Hub 50 units, only one of the hubs’ segment switch will be active, refer to “Multiple PS Hub 50 Units in a Stack”...

  • Page 69: Ip Addresses

    IP Addresses If you are uncertain about what IP addresses to assign your equipment, contact your network administrator. To operate correctly, each device on your network (for example a hub or management station) must have a unique IP address (if one is configured).

  • Page 70: Command Line Interface (Cli)

    5: M HAPTER ANAGING THE Command Line The CLI allows you to configure a limited set of parameters for the Interface (CLI) hub. You can access the CLI: This section has information on accessing the CLI. For more information on using the CLI, refer to Chapter 6. Through the Console Table E-1 shows the settings for the hub’s console port.
  • Page 71 To connect your equipment: 1 Connect the serial port on your terminal or management station to the console port on the PS Hub, using a null modem cable. 2 Ensure that the terminal or management station’s serial port settings match those of the console port on the PS Hub. Using a Terminal Emulator You can use the terminal emulator that comes with Microsoft Windows to access the hub’s CLI:...
  • Page 72 5-10 5: M HAPTER ANAGING THE Terminal can usually be found from the Main window, in the Terminal Accessories program group. To start a Terminal session (after connecting to the hub’s console port): 1 Double-click on the ‘Terminal’ icon to start the application. 2 If the Default Serial Port dialog box appears, select the serial port that you are using to connect to the hub and click OK.

  • Page 73: Over The Network

    Over the Network You can access the CLI over a TCP/IP network using Telnet. To run Telnet, you need a suitable terminal or management station running a terminal emulator. You can have multiple CLI management sessions at the same time. If a connection is lost inadvertently, the connection is closed by the hub after about 30 minutes of inactivity.

  • Page 74: Web Interface

    Port If your management station is running Windows ‘95, you must use the 3Com serial web utility that is supplied on the CD-ROM. This is a SLIP driver that sets up SLIP access for web interface management. To install and use the serial web utility, refer to Appendix C.

  • Page 75: Quick Config Manager

    To do this for Netscape Navigator: 1 Start Netscape Navigator. 2 From the Options menu, select Network Preferences. The preferences dialog box appears. 3 Check the ‘Every Time’ checkbox. 4 Click OK. To do this for Microsoft Internet Explorer: 1 Start Microsoft Internet Explorer. 2 From the View menu, select Options.

  • Page 76: Over The Network

    5-14 5: M HAPTER ANAGING THE When using Quick Config Manager with Windows ‘95 and managing through the console port, you must first disable FIFO buffers in the Advanced Port Settings window in Windows ‘95. To do this: 1 In the Windows ‘95 environment, select My Computer. 2 Select (in turn): Control Panel, System, Device Manager, Ports, COM1 (or whatever COM port you are using instead), Port Settings, and Advanced.

  • Page 77: Using The Command Line Interface

    SING THE OMMAND NTERFACE This chapter describes how to use the Command Line Interface (CLI). The CLI is a quick and simple interface that is built-in to the hub, which allows you to enter various IP address settings, reset it and initialize it. The web interface and Quick Config Manager can perform most of the tasks that the CLI can do.

  • Page 78: Accessing The Cli

    6: U HAPTER SING THE OMMAND NTERFACE Accessing the CLI By default, the hub automatically configures the baud rate of its console port to operate with the connected management station or terminal, provided the parity, stop bits and character size are identical to the connected management station or terminal.

  • Page 79: Logging Off

    Default User Names and Passwords Table 6-1 shows the default users that can access the hub and their level of access. We recommend that setting a password is the first task you carry out on the hub. Setting a password prevents unauthorized management access to the hub or stack.

  • Page 80: Using The Cli Menus

    6: U HAPTER SING THE OMMAND Using the CLI When you log on to the CLI correctly, the top-level menu is displayed, Menus as shown in Figure 6-1. The unit description, unit name and unit number are shown ( Figure 6-1 Use the CLI by selecting options from this menu and from the others below it.

  • Page 81: Navigating The Menus And Entering Commands

    Navigating the You can navigate the menus using any of the following methods: Menus and Entering Commands As you navigate through the menus, the prompt changes to display your current position in the hierarchy. For example, if you are in the interface sub-menu of the system menu, ready to enter your next option, the prompt reads: Entering Commands...

  • Page 82: Quick Guide To The Commands

    6: U HAPTER SING THE OMMAND Quick Guide to the Table 6-2 lists all of the commands available from the CLI and shows Commands you briefly what each one does and the pages in this chapter that describes how to use the commands. Table 6-2 Command define...

  • Page 83: Commands

    Commands The remaining sections in this chapter detail the management functions that can be carried out from the CLI. Changing the We recommend that setting a password is the first task you carry out Password on the hub. Setting a password prevents unauthorized management access to the hub or stack.

  • Page 84: Setting The Ip Configuration

    6: U HAPTER SING THE OMMAND Setting the IP Before you can manage the hub over the network, you must assign it Configuration an IP address and subnet mask. You may also need to enter a default router (sometimes known as the default gateway) address. The default router is the router (if you have one) which is used by the stack to communicate with other networks.

  • Page 85: Viewing The Configuration

    Displaying the Hub Configuration At the top-level menu, enter: system display The CLI displays information similar to this example: 3Com PS Hub 50 (3C16450) Unit Name: Marketing Location: Top floor Contact: James Time since reset: 2 days, 3 hours, 10 minutes Operational Version: 1.00...

  • Page 86: Resetting The Stack

    CAUTION: Performing a reset may cause some of the data being transmitted over the network to be lost. It also clears the non-permanent addresses in the PS Hub 50 unit’s switch database. To reset the stack: 1 At the top-level menu, enter: system reset 2 The CLI asks you to confirm the reset.

  • Page 87: Initializing The Stack

    Initializing the Stack Initializing the stack causes it to return to its factory default settings. You may want to do this if the stack has been previously used in a different part of your network, and its settings are incorrect for its new environment.

  • Page 88: Enabling And Disabling Rmon Filter Capture

    6-12 6: U HAPTER SING THE OMMAND Enabling and You can enable or disable RMON Filter capture. By default this is Disabling RMON enabled. You may wish to disable this if you have no requirement to perform RMON packet monitoring and wish to increase the security of Filter Capture your network.

  • Page 89: Management Using The Web Interface

    If you want to access the web interface through a serial link from a Windows a hub in the stack), you must use the 3Com serial web utility (SLIP Driver); refer to Appendix C. Any number of people can access the web interface over the network, at the same time.
  • Page 90 7: M HAPTER ANAGEMENT 3 In the browser’s open location window or area, enter the web address URL (Uniform Resource Locator) for the stack. The web address URL for a stack is in the format: http:// nnn.nnn.nnn.nnn / Where nnn.nnn.nnn.nnn is: The SLIP address for the stack, which is ‘192.168.101.1’...
  • Page 91 Accessing the Web Interface When the correct user name and password have been entered, the front page of the web interface may be displayed, as shown in Figure 7-2. If this is the first time that the stack has been accessed using the web interface, the first page of the Getting Started pages is displayed.

  • Page 92: About The Web Interface

    7: M HAPTER ANAGEMENT About the The web interface has been designed so that it is easy to use. It is Web Interface made up of three areas, as shown in Figure 7-3; the banner, side bar (always displayed) and page (changes to show the different information about the stack).

  • Page 93: External Links

    Table 7-1 shows the management categories that are on the side bar. Table 7-1 External Links Table 7-2 shows the external links that appear on the banner. You can also click on the 3Com logo to display the 3Com web site. Table 7-2 Help Documentation...

  • Page 94: Page Components

    7: M HAPTER ANAGEMENT Page Components When you click on the management categories or stack icon, the page area changes to show various kinds of information. A page can consist of these components: Fields — Display current values and allow you to enter new values if required.

  • Page 95: Using The Web Interface

    Using the Web To display management category pages: Interface 1 Click on the management category (on the side bar) that you require. The page area changes to show a row of page links and the first page in that category, as shown in Figure 7-5. You can make changes to the information on the current page and click Apply when finished.

  • Page 96: Unit View And Unit Pages

    Segment Configuration — The Segment Configuration page is displayed. The segment switch or Cascade Switch — The Switch Configuration page is displayed (only available for a PS Hub 50). If you click on one of the segment buttons, the Unit View highlights the ports (with a blue surround) that are part of that segment.

  • Page 97: User Access Levels

    User Access Levels For information on what the different user levels can manage, refer to “Default User Names and Passwords” on page 6-3. You can exit from the web interface at any time by closing your web Exiting the Web Interface browser.

  • Page 98: Unit Pages

    “Port Setup” on page 7-13. The Segment Switch The Unit View for a PS Hub 50 shows the segment switch. If it is green, it is the active segment switch. If it is gray, it is disabled.

  • Page 99: Unit Status

    Unit Pages 7-11 Unit Status This page provides detailed information about the unit: Unit Name The name configured for the stack. Location Where the stack is located. Contact The person to contact if there is a problem with the stack. The Unit Name can be configured using the System Name page (in the Management Settings category), refer to “System Name”...

  • Page 100: Management Address

    7-12 7: M HAPTER ANAGEMENT SING THE NTERFACE Management This page specifies a unique IP address for the stack, as shown in Address Figure 7-8. If you have no previous knowledge of IP, refer to “IP Addresses” on page 5-7. If you change any of these values, you may need to re-access the hub using the new values.

  • Page 101: Port Setup

    Unit Pages 7-13 Port Setup This page specifies the port state (enable or disable), link state, partition state and the segment to which the port is attached, as shown in Figure 7-9. Figure 7-9 Port Setup Page The fields are: Connector Type Shows the type of cable connected to the port.

  • Page 102: Console Port Configuration

    7-14 7: M HAPTER ANAGEMENT SING THE NTERFACE Console Port This page configures the console port. Configuration The PS Hub’s console port is already correctly configured by default, for direct connection to a management station. Only alter these default settings if you are connecting a modem to the console port. CAUTION: Do not change any of these settings unless you fully understand what you are doing.

  • Page 103: Segment Configuration

    Segment This page configures the segments in the hub, as shown in Figure 7-10. Configuration You can: Figure 7-10 To view which ports belong to a segment, click on the segment button on the Unit View. The graphic changes and ports that are members of that segment are highlighted with a dark blue surround.

  • Page 104: Switch Configuration

    Switch Configuration This page is used to select which cascaded segments the active segment switch is attached to. Click on the checkboxes to connect or isolate the switch as necessary. This functionality is only available for the PS Hub 50.

  • Page 105: Management Settings Pages

    Management This section describes the fields that appear on the pages in the Settings Pages Management Settings category. The first page displayed is the Documentation page. Documentation This page specifies the directories or URL’s that are used to access the online help system and documentation, as shown in Figure 7-12.

  • Page 106: Getting Started

    7-18 7: M HAPTER ANAGEMENT Getting Started The Getting Started pages are a series of pages which set up basic information for the stack. You are asked: If you have no previous knowledge of IP, refer to “IP Addresses” on page 5-7.

  • Page 107: Password Setting

    Management Settings Pages 7-19 Password Setting This page changes the password for the user level that you are using, as shown in Figure 7-13. The passwords that you type do not appear on the screen. Password Setting Page Figure 7-13 The fields are: New Password Type the new password you want to use.

  • Page 108: Configuration Pages

    CAUTION: Performing a reset may cause some of the data being transmitted over the network to be lost. It also clears the non-permanent addresses in the PS Hub 50 unit’s switch database. SING THE NTERFACE...

  • Page 109: Resilient Links

    Configuration Pages 7-21 Resilient Links This page shows the resilient links that have been set up for the stack, as shown in Figure 7-14. This page is only available if there is a PS Hub 50 in the stack. Only 10BASE-T and fiber optic ports (if there are fiber optic transceiver modules fitted to hubs in the stack) can be part of a resilient link.
  • Page 110 7-22 7: M HAPTER ANAGEMENT SING THE NTERFACE What are Resilient Links? You can make the network more robust by adding resilience to it. When a link fails all communication between equipment on each side of the link is lost. To ensure important communication is not lost, the network needs to be reinstated immediately which could be very inconvenient for the network manager.

  • Page 111: Add Resilient Link

    Resilient Link Rules Always follow these rules when setting up a resilient link pair: If you have more than two stacks there are a number of ways you can use resilience when linking them. Remember to connect the stacks correctly for both links, refer to “Connecting Different Hubs and Stacks to Your Hub”...

  • Page 112: Software Upgrade

    The file name format is: Where xx_yy is the version of agent software. You can specify multiple file names (separated by spaces), to upgrade PS Hub 40 and PS Hub 50 units in the stack at the same time, for example: psh02_00.bin psf02_00.bin...

  • Page 113: Health Pages

    Health Pages This section describes the fields that appear on the Segment Graph page in the Health category. Segment Graph This page shows two graphs for a segment in a unit in the stack. The first graph shows information for the last hour, the second graph shows information for the last 48 hours, as shown in Figure 7-16.
  • Page 114 7-26 7: M HAPTER ANAGEMENT SING THE NTERFACE DUA1640-5AAA02...

  • Page 115: Problem Solving

    The PS Hub has been designed to aid you when detecting and solving possible problems with your network. These problems are rarely serious, the cause is usually a disconnected or damaged cable, or incorrect configuration. If this chapter does not solve your problem, contact your supplier for information on what to do next.

  • Page 116: Solving Problems With The Hub

    Power LED yellow. The hub has failed its self-test due to an internal problem, you need to contact your supplier. Port Status LED yellow (PS Hub 40) or flashing green (PS Hub 50) for a 10Mbps transceiver module port. It is likely that there is a loop in your network which has caused this port to partition.

  • Page 117: Solving Problems With The Command Line Interface

    Transceiver module not working. Check the Status LED for the transceiver module slot. There is a problem if the LED is yellow (PS Hub 40) or flashing green (PS Hub 50 10Mbps transceiver module). It may be for these reasons: Solving Problems The initial Login prompt does not display.

  • Page 118: Solving Problems With The Web Interface

    Interface The web browser cannot access the stack over a serial link from a Windows ‘95 management station. You must use the 3Com serial web utility (SLIP Driver), refer to Appendix C. The web browser can no longer access the stack. Check that the port through which you are trying to access the stack has not been disabled.

  • Page 119: Solving Problems With An Snmp Network Management Application

    Solving Problems The SNMP network management application cannot access the With an SNMP stack. Check that: Network Management Application Traps are not received by the SNMP network management application. Check that the address of the management station is entered in the stack. You can do this using Quick Config Manager; refer to “Giving the Stack an IP Address”...
  • Page 120 8: P HAPTER ROBLEM OLVING DUA1640-5AAA02...

  • Page 121: Tandards And

    Dimensions and Table A-1 and Table A-2 show the specifications for the PS Hub. Operating Table A-1 Environment Table A-2 BABT Approval The PS Hub is covered by Oftel General Approval, (for U.K. Users NS/G/12345/J/100003, for indirect connection to a public Only) telecommunications system.

  • Page 122: Standards

    A: D PPENDIX IMENSIONS Standards Table A-3 shows the standards the PS Hub conforms to. Table A-3 Functional Safety EMC emissions EMC immunity Environmental Reliability * Category 5 screened cables must be used to ensure compliance with the Class B/Class 2 requirements of this standard. The use of unscreened cables (Category 3 or 5) complies with the Class A/Class 1 requirements.

  • Page 123: Cabling

    Cabling This section shows the pin-outs for the various cables that are used with the PS Hub. These cables are available from your supplier. 10BASE-T Cable Figure A-1 Straight-through Figure A-2 Crossover Figure A-3 DUA1640-5AAA02 Pin Numbering for 10BASE-T Straight-through 10BASE-T Cabling Crossover 10BASE-T Cabling Cabling...

  • Page 124: Console Cable

    A: D PPENDIX IMENSIONS TANDARDS AND Console Cable Figure A-4 Examples of Null Modem Cables You Can Use Figure A-5 ABLING Pin Numbering for Console Example of Null Modem Cabling for 9 pin Management Station DUA1640-5AAA02...

  • Page 125: Modem Cable

    Figure A-6 Modem Cable Figure A-7 DUA1640-5AAA02 Example of Null Modem Cabling for 25 Example of Modem Cabling for 25 Cabling pin Management Station pin Management Station...

  • Page 126: Cascade Connections

    A: D PPENDIX IMENSIONS Cascade Connections Cascade cables are available in a range of lengths from your supplier. Hot Swap Cascade Units are also available. Table A-4 shows the product numbers and the lengths of these items. Table A-4 Number 3C16420 3C16421 3C16422...
  • Page 127 ANAGEMENT SING UICK ONFIG ANAGER This appendix describes how to install and use Quick Config Manager. For an overview of what you can do when managing the stack, refer to “Why Manage Your Stack?” on page 5-2. Quick Config Manager has a comprehensive help system that has the same useful information as this appendix.

  • Page 128: B Management Using Quick Config Manager

    SING UICK ONFIG ANAGER Zoom View (updated) Access Information (updated) Switch Configuration (new) Software Upgrade (updated) Launch Load Balancing Tool (new) Microsoft Windows 3.1 or later or Windows ‘95 or Windows NT. The Load Balancing Tool only installs and runs on a Windows ‘95 or Windows NT system.

  • Page 129: Installation Procedure

    Installation Quick Config Manager can be installed on its own or onto a Procedure workstation that already has other Transcend management applications installed. CAUTION: Do not install Quick Config Manager in the same directory as any previously installed Transcend management applications. Quick Config Manager and the Load Balancing Tool are installed in subdirectories (QCM and LOADBAL) under the default directory of C:\TRANSCND.

  • Page 130: Running Quick Config Manager

    B: M PPENDIX ANAGEMENT Running Quick Whenever you want to start the Quick Config Manager application, Config Manager double-click on the Quick Configuration Manager icon. CAUTION: Do not run Quick Config Manager in parallel with any other Transcend management application. Before you can manage the stack, you must make a management connection to the stack.

  • Page 131: Selecting Your Management Access Method

    Selecting Your Management Access Method (Windows ‘95 and Windows NT only) Selecting Your Windows ‘95 and Windows NT allow you to manage the stack over the Management network (in-band) using Quick Config Manager. To manage the stack Access Method over the network, the stack must have an IP address and IP must be (Windows ‘95 and configured on your management station.
  • Page 132 B: M PPENDIX ANAGEMENT SING UICK ONFIG ANAGER Quick Config Manager Window Map Figure B-2 DUA1640-5AAA02...
  • Page 133 Quick Config Manager Window Map DUA1640-5AAA02...

  • Page 134: Accessing The Stack

    B: M PPENDIX ANAGEMENT Accessing the Stack The PS Hub uses community strings as a security measure, to check management access to the stack. The community string you use must match one of the community strings configured for the stack. Quick Config Manager remembers the last community string used.

  • Page 135: Giving The Stack An Ip Address

    Giving the Stack You can configure the stack with an IP address and other address an IP Address information, enabling it to communicate over (become part of) an IP network. The stack does not need an IP address to make Quick Config Manager work with it over a serial connection.
  • Page 136 B-10 B: M PPENDIX ANAGEMENT To display the IP Setup dialog box and view or configure the hub’s address settings: 1 From the Configure menu, select IP Setup. Quick Config Manager displays either the IP Setup dialog box or the Easy Setup Option, as shown in Figure B-4, depending on the IP information currently configured for the hub: Figure B-4...
  • Page 137 2 Enter the relevant information into the IP Setup dialog box or Easy Setup dialog boxes and click OK to exit the dialog boxes. 3 Reset the hub for any changes to take effect. After resetting the hub, you may need to select Reset View from the File menu to restart communication using the new information.

  • Page 138: Viewing The Stack

    B-12 B: M PPENDIX ANAGEMENT Viewing the Stack Quick Config Manager can display a graphical representation of the stack you are managing, with: For information on segments and how they work, refer to “Segments and Port Switching” on page 1-8. To display the stack: Figure B-5 In the Community/Polling dialog box, you can specify whether the...
  • Page 139 Port Colors and Icons The port color coding shows these conditions: Port colors If you have a PS Hub 50 in the stack, its Segment Switch icon is: Segment Switch icon If a hub is connected to a Redundant Power System (RPS), an icon is RPS icon shown on the right of the hub’s graphical representation.

  • Page 140: Configuring Segments

    B-14 B: M PPENDIX ANAGEMENT Connecting or Isolating Segments from Their Cascade Segments Next to each segment name button, is another button that shows if the segment is connected or isolated from its associated cascade segment: Double-click the button to connect or disconnect the segment from the cascade segment.
  • Page 141 For management communication to work over the network, the port through which your communication reaches the stack must be connected to segment 1 of the hub with the IP address configured. You can configure the segments for any of the hubs in the stack, regardless of the hub through which your management reaches the stack.
  • Page 142 B-16 B: M PPENDIX ANAGEMENT 4 Using the Segment pull down list box, select the segment to which you want to move ports. 5 Highlight the ports in the Port Segment list and click Add >> to add them to the Segment Member Ports list. 6 Click Apply to confirm your changes before choosing any other hubs or segments for which you want to move ports.

  • Page 143: Configuring The Segment Switch

    All PS Hub 50 units have a segment switch. If you have multiple Segment Switch PS Hub 50 units in a stack, only one of the units has its segment switch enabled, called the active segment switch. You can use Quick Config Manager to connect or isolate the stack’s active segment switch from...

  • Page 144: Load Balancing

    B-18 B: M PPENDIX ANAGEMENT Load Balancing The PS Hub has a load balancing feature which you can use to move the ports between the segments in the stack for you. The aim of load balancing is to reduce total traffic across the segments. It does this by distributing the traffic between the segments, and keeping the stations that frequently communicate with each other on the same cascaded segment, which provides more efficient segments.

  • Page 145: Menus

    Figure B-8 Because load balancing is part of the PS Hub, when you exit from the Load Balancing Tool, the load balancing feature continues to work as configured. Menus The Load Balancing window has five menu items along the top. There is also a pull right menu that can be obtained by clicking on the right mouse button while the mouse pointer is over one of the segments.

  • Page 146: Viewing Current Utilization

    B-20 B: M PPENDIX ANAGEMENT Viewing Current When the Load Balancing window is first displayed, the window shows Utilization the Current Utilization page, as shown in Figure B-9. Figure B-9 This page shows the current utilization both across the stack and on individual segments.

  • Page 147: Viewing Utilization History

    Viewing Utilization If you click the History tab to the top of the panel, the Utilization History History page is displayed, as shown in Figure B-11. Figure B-11 This page shows a graph of the utilization history for: The graph displays the values as percentages. When the PS Hub is powered on, it starts recording the values for each segment.
  • Page 148 B-22 B: M PPENDIX ANAGEMENT How the Utilization History Graph Can Be Used The Utilization History graph is very useful for showing you the positive changes in utilization of load balancing. You can view the utilization before and after load balancing was performed, as shown in Figure B-12.

  • Page 149: Fixing And Unfixing Segments And Ports

    Fixing and Unfixing You can fix segments and ports so that they are not moved by load Segments and Ports balancing: Fixing ports or segments does not prevent you from moving the ports between segments yourself, using the web interface or Quick Config Manager.
  • Page 150 B-24 B: M PPENDIX ANAGEMENT Ports To fix or unfix a port or multiple ports: 1 Right-click on the segment’s name or utilization bar for the segment that contains the port(s). A pull right menu appears next to the mouse pointer. 2 Select Fixed Ports.

  • Page 151: Performing Load Balancing

    CAUTION: The equipment connected to the ports that are moved by load balancing must have their MAC addresses relearnt by the PS Hub 50 (or external switch), so a small amount of packet loss may occur while these addresses are relearnt.
  • Page 152 B-26 B: M PPENDIX ANAGEMENT Enabling or Disabling the Automatic Load Balancing Feature To enable or disable the automatic load balancing feature: 1 From the Configure menu, select Load Balancing. Quick Config Manager displays the Load Balancing dialog box. 2 Use the Enable Load Balancing check box to enable or disable the automatic load balancing feature.

  • Page 153: Changing The Console Port Settings

    Changing the The PS Hub’s console port is already correctly configured by default, Console Port for direct connection to a management station (terminal). Only alter Settings these default settings if you are connecting a modem to the console port. CAUTION: Do not change any of these settings unless you fully understand what you are doing.

  • Page 154: Upgrading A Stack

    In the future, an upgrade may be issued which enhances the functionality of the PS Hub. Any such upgrade will be available on the 3Com Bulletin Board Service, refer to “3Com Bulletin Board Service” on page E-1. Quick Config Manager allows you to upgrade a whole stack at a time, with any such upgrade.

  • Page 155: Solving Problems With Quick Config Manager

    The file name format is: Where xx_yy is the version of agent software. You can specify multiple file names (separated by spaces), to upgrade PS Hub 40 and PS Hub 50 units in the stack at the same time, for example: psh02_00.bin psf02_00.bin...
  • Page 156 B-30 B: M PPENDIX ANAGEMENT You cannot access the hub over the network for the first time. Check that: You lose your management connection while managing the stack. If you have changed the community string of the access level that you are using, you must enter the new community string in the Community/Polling dialog box.

  • Page 157: Serial Web Utility

    If you are using a management station running Microsoft Windows Hub’s console port, you must use the 3Com serial web utility (SLIP Driver) supplied on the CD-ROM that accompanies the hub. Every time you want to access the web interface, use the serial web utility to set up the connection to the web interface;...
  • Page 158 C: S PPENDIX ERIAL TILITY 4 In the Run dialog box, type (where The installation program starts and checks your system configuration; enter any information that’s requested. If the setup program cannot find specific files on your management station, it asks you to insert you Windows ‘95 CD-ROM. If it still cannot find the files, you must obtain them directly from Microsoft.

  • Page 159: Using The Serial Web Utility

    6 When you have finished, the final installation dialog box is displayed informing you that the serial web utility has been installed on your management station. Click Finish to close the dialog box. 7 You are asked if you want to restart Windows ‘95 so that it can use the new settings you have configured.

  • Page 160: Solving Problems With The Serial Web Utility

    C: S PPENDIX ERIAL 4 The connection is successful if the web interface’s password panel is displayed. You are now ready to manage the hub or stack; refer to Chapter 7. Solving Problems If you are unable to connect to the hub’s web interface, it may be that: With the Serial Web Utility To change some of the settings for the management station, use the...

  • Page 161: Agent Upgrade Utility

    The CD-ROM supplied with the hub has an agent upgrade utility on it that can be used for upgrading the new version of agent software to the PS Hub. NOTE: You would only use this utility if a previous software upgrade has failed and you are unable to communicate with your hubs using the web interface or Quick Config Manager.
  • Page 162 7 Power on the hub immediately (within 5 seconds). The utility transfers the agent software to the hub. 8 Repeat all of the steps for any other hubs that need upgrading. TILITY PS Hub 40 software upgrade — PS Hub 50 software upgrade — -c 2 .bin update psh .bin...

  • Page 163: Solving Problems With The Agent Upgrade Utility

    Solving Problems If you have any problems using the upgrade utility, use the following With the Agent actions to solve your problems. Upgrade Utility An error occurred when the utility tried to connect through the PC’s serial port. The serial port being used is not the same as the serial port specified in the upgrade command.
  • Page 164 D: A PPENDIX GENT PGRADE An error occurred when the utility tried to transfer the file. There could be a number of reason for this: TILITY The null modem cable has become disconnected from the hub or the PC during the file transfer. Reconnect the cable and start again. Power to the hub has been disrupted during the file transfer.

  • Page 165: Technical Support

    For the very latest, we recommend that you access 3Com Corporation’s World Wide Web site. Online Technical 3Com offers worldwide product support 24 hours a day, 7 days a Services week, through the following online systems: World Wide Web Site Access the latest networking information on 3Com Corporation’s World...

  • Page 166: 3Comfacts Automated Fax Service

    3Com Corporation’s interactive fax service, 3ComFacts, provides data 3ComFacts Automated Fax sheets, technical articles, diagrams, and troubleshooting instructions on Service 3Com products 24 hours a day, 7 days a week. Call 3ComFacts using your Touch-Tone telephone using one of these international access numbers: Country Hong Kong U.K.

  • Page 167: 3Comforum On Compuserve Online Service

    Malaysia 3ComForum contains patches, software, drivers, and technical articles 3ComForum on CompuServe Online about all 3Com products, as well as a messaging section for peer Service support. To use 3ComForum, you need a CompuServe account. To use 3ComForum: 1 Log on to your CompuServe account.

  • Page 168: Support From 3Com

    Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com. Contact your local 3Com sales office to find your authorized service provider using one of these numbers: Regional Sales Office...

  • Page 169: Returning Products For Repair

    Returning Products Before you send a product directly to 3Com for repair, you must first for Repair obtain a Return Materials Authorization (RMA) number. Products sent to 3Com without RMA numbers will be returned to the sender unopened, at the sender’s expense.

  • Page 171: Glossary

    10BASE-T The IEEE 802.3 specification for Ethernet over Twisted Pair (TP) cabling. active segment In a stack with multiple PS Hub 50 units, only one segment switch can switch be active (called the active segment switch), the other segment switches are disabled. See segment switch.
  • Page 172 (usually not larger than a floor or building). Characterized by high data rates and low error rates. learnt address An address in the switch database that has been learnt (stored) by the segment switch. Unused learnt addresses are removed from the switch database by the ageing process.
  • Page 173 Single packets copied to a specific subset of network addresses. These addresses are specified in the destination-address field of the packet. An address in the switch database that has been made permanent. permanent address Permanent addresses are not removed from the switch database by the ageing process.

  • Page 174: Segment Switch

    LOSSARY segment switch The internal switch in a PS Hub 50. It connects the four cascaded segments so that devices connected to the cascaded segments can communicate through the segment switch. The segment switch works by learning addresses and storing them in a switch database, which it can refer to and selectively forward on information.

  • Page 175: World Wide Web

    ® Transcend 3Com’s management system used to manage all of 3Com’s networking solutions. User Datagram Protocol. An internet standard protocol that allows an application program on one device to send a datagram to an application program on another device.
  • Page 176 LOSSARY...
  • Page 177 NDEX Numerics 100Mbps transceiver module 2-6 10BASE-T cable 3-4 ports 3-2 using cables 3-11 3Com Bulletin Board Service (3ComBBS) E-1 3Com sales offices E-4 3Com URL E-1 3ComFacts E-2 3ComForum E-3 802.1 bridge mode 2-4 about the hub 1-1 access...
  • Page 178 A-1 equipment Ethernet example of workgrouping 1-11 expanding a network 1-6 external extra bits 3-4 setting for segment switch 2-4 SLIP address 5-7 user names and passwords 6-3 7-12 7-20 Community/Polling B-8 device access B-5 IP Setup B-10...
  • Page 179 3-13 hub segments work 1-8 load balancing works 4-2 PS Hub 50 transceiver module ports work 2-6 PS Hubs differ 2-1 how the segment switch works 2-3 how to use hub 1-4 LEDs and ports 3-2 accessing B-8...
  • Page 180 6-8 displaying 6-9 IP Setup dialog box B-10 IP/IPX-based network management 5-5 application problems 8-5 isolating problems 8-1 segment switch 7-16 segments 7-15 B-14 items that come with the hub 3-4 labels 3-7 learnt addresses 2-3 LEDs 3-1 lights 3-1...
  • Page 181 8-2 using the web interface 8-4 product number cables A-6 hub 3-7 PS Hub 40 transceiver module ports 2-2 PS Hub 50 1-6 PS Hub 50 segment switch 2-2 PS Hub 50 transceiver module port 2-6 Quick Config Manager 5-3...
  • Page 182 LEDs 3-2 load balancing 4-1 naming B-14 selecting management access method B-5 self test 3-17 self-adhesive rubber feet 3-6 self-selecting switch mode 2-3 separate networks 1-8 serial access C-1 serial number of the hub 3-7 serial web utility C-1 server B-29...
  • Page 183 1-5 transceiver module 1-6 3-12 blanking plate 3-1 slots 3-2 transceiver module ports 3-12 PS Hub 40 2-2 PS Hub 50 2-6 Transcend Quick Configuration Manager 5-3 traps 7-22 trouble shooting 8-1 unfixing ports and segments B-23...
  • Page 184 NDEX workgroups 1-4 building up 1-8 example 1-11 workstation connections 3-4 World Wide Web (WWW) E-1 Zoom View B-8 B-12 B-16...
  • Page 185 See below for terms and conditions of this warranty. 3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller:...
  • Page 186 ATTEMPTS TO REPAIR OR MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD. TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL,...
  • Page 187 EMC S TATEMENTS FCC S TATEMENT CSA S TATEMENT VCCI S TATEMENT NFORMATION 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. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

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