3Com 3C16685 User Manual
  1. Manuals
  2. Brands
  3. 3Com Manuals
  4. Network Hardware
  5. 3C16685
  6. User manual
3Com 3C16685 User Manual

3Com 3C16685 User Manual

Superstack ii dual speed hub management module
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
®
http://www.3com.com/
Part No. DUA1668-5AAA04
Published November 2000
SuperStack
Dual Speed Hub 500

Management Module

User Guide

Software Version: 2.14
®
II

Advertisement

Table of Contents
loading

Related Manuals for 3Com 3C16685

Summary of Contents for 3Com 3C16685

  • Page 1: Management Module

    SuperStack Dual Speed Hub 500 ® Management Module User Guide Software Version: 2.14 http://www.3com.com/ Part No. DUA1668-5AAA04 Published November 2000 ®...
  • Page 2 “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable.

  • Page 3: Table Of Contents

    ONTENTS MPORTANT AFETY L’ INFORMATION DE ICHTIGE ICHERHEITSHINWEISE BOUT UIDE Conventions Related Documentation Product Registration Year 2000 Compliance Documentation Comments VERVIEW AND ODULE Introduction 15 Smart Auto-sensing Feature Management of the Dual Speed Hub 500 Management of the Distance Extender Modules Management of a Different Hub or Stack How the Management Module Can Be Used Management Resilience...
  • Page 4 ANAGING THE Management Features 24 Management of the Dual Speed Hub 500 Management of the Distance Extender Modules Management of a Different Hub or Stack Removing Management From the Hub How You Can Manage the Dual Speed Hub 500 Command Line Interface Web Interface SNMP Network Management RMON...
  • Page 5 Resetting the Stack Initializing the Stack Enabling and Disabling Remote Access to the Stack Enabling and Disabling RMON Filter Capture Using PING to Test the Connections to Other Devices Resetting the IP Configuration Upgrading the Management Software Displaying and Changing SNMP-related Information SING THE NTERFACE Accessing the Web Interface 73...
  • Page 6 Smart Auto-sensing Software Upgrade Health Pages Segment Graphs Accessing a Different Hub or Stack Configuring Your Browser ROBLEM OLVING Isolating a Problem 106 Solving Problems With the Command Line Interface Solving Problems With the Web Interface Solving Problems With an SNMP Network Management Application ABLING AND Management Settings 111...
  • Page 7 Using the Update Utility Solving Problems With the Serial Update Utility ECHNICAL UPPORT Online Technical Services 131 World Wide Web Site 3Com Knowledgebase Web Services 3Com FTP Site Support from Your Network Supplier Support from 3Com Returning Products for Repair LOSSARY...
  • Page 9 MPORTANT 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 Dual Speed Hub Management Module. Installation and removal of the module must be carried out by qualified personnel only.

  • Page 10: Wichtige Sicherheitshinweise

    ICHTIGE ICHERHEITSHINWEISE ICHTIGE ICHERHEITSHINWEISE WARNHINWEIS: 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 Dual Speed Hub Management Module Einheit die folgenden Sicherheitsanweisungen durchlesen. Die Installation und der Ausbau des Moduls darf nur durch Fachpersonal erfolgen.

  • Page 11: About This Guide

    Most user guides and release notes are available in Adobe Acrobat Reader Portable Document Format (PDF) or HTML on the 3Com World Wide Web site: http://www.3com.com/...
  • Page 12 BOUT UIDE Table 2 Text Conventions Convention Screen displays Commands The words “enter” and “type” Keyboard key names Words in italics Description This typeface represents information as it appears on the screen. The word “command” means that you must enter the command exactly as shown and then press Return or Enter.

  • Page 13: Related Documentation

    You can now register your SuperStack II Dual Speed Hub 500 Management Module on the 3Com Web site to receive up-to-date information on your product: http://support.3com.com/registration/frontpg.pl Year 2000 Compliance For information on Year 2000 compliance and 3Com products, visit the 3Com Year 2000 Web page: http://www.3com.com/products/yr2000.html 5HODWHG 'RFXPHQWDWLRQ...

  • Page 14: Documentation Comments

    UIDE Documentation Comments Your suggestions are very important to us. They will help make our documentation more useful to you. Please e-mail comments about this document to 3Com at: pddtechpubs_comments@3com.com Please include the following information when commencing: Document title Document part number (on the title page)

  • Page 15: Overview And Installation Of The Management Module

    OF THE This chapter contains the following topics: An introduction to the management module and the products it can be used with How the management module can be used Installing and removing the management module Introduction The SuperStack Figure 1, is an easy to use management module that provides SNMP and RMON support for the SuperStack II Dual Speed Hub 500 range of units.

  • Page 16: Smart Auto-Sensing Feature

    1: O HAPTER VERVIEW AND Smart Auto-sensing Feature Smart auto-sensing only works if it is enabled (it is enabled for the stack by default) and the device to which the port is connected supports 10/100 auto-negotiation. When a 100Mbps connection is made to one of the ports on the Dual Speed Hub 500, the Smart auto-sensing feature checks the quality of the connection.

  • Page 17: Management Of The Distance Extender Modules

    Management of the Distance Extender Modules The Dual Speed Hub 500 can be fitted with these modules: 3C16683 — 100BASE-TX Distance Extender Module 3C16684 — 100BASE-FX Distance Extender Module The slide-in modules for the Dual Speed Hub 500 are not hot-swappable.

  • Page 18: How The Management Module Can Be Used

    1: O HAPTER VERVIEW AND How the Management Module Can Be Used The management module can be fitted into either of the transceiver module slots in the Dual Speed Hub 500; refer to Management Module” this. When multiple Dual Speed Hub 500 units are connected together with cascade cables, they form a single hub (called a stack).

  • Page 19: Installing And Removing The Management Module

    Installing and Removing the Management Module Before You Start WARNING: Ensure you have read the Important Safety Information section carefully before you start. AVERTISSEMENT: Assurer que vous avez lu soigneusement la section de L’information de Sécurité Importante avant que vous commenciez.

  • Page 20: Installing The Management Module

    1: O HAPTER VERVIEW AND Installing the Management Module Before you install the management module, please ensure that any equipment to be attached to the Dual Speed Hub 500 has the latest version of its driver software installed, especially any network interface card.

  • Page 21: Removing The Management Module

    Figure 2 Inserting the Management Module (either slot can be used) 5 Fix the front panel of the management module to the hub using the two screws from the blanking plate, as shown in Figure 3 Fixing the Management Module in Place Removing the Management Module To remove the management module from the Dual Speed Hub 500: 1 Ensure that the hub is disconnected from the power supply, and that...

  • Page 22: Powering On The Hub Or Stack

    1: O HAPTER VERVIEW AND 4 Replace the blanking plate over the empty transceiver module slot in the rear of the hub, and use the two screws to fix the blanking plate in place. For information on how the hub’s configuration is affected by the removal of the management module, refer to Management From the Hub”...

  • Page 23: Managing The Dual Speed Hub

    ANAGING THE This chapter contains the following topics: An overview of the management provided by the management module What you can use to manage the hub or stack How you can make a management connection to the hub or stack A stack of Dual Speed Hub 500 units is treated as a single manageable entity, and the management is distributed.

  • Page 24: Management Features

    2: M HAPTER ANAGING THE Management Features With management, you can change and view the way the hub or stack operates. Management of the Dual Speed Hub 500 Using the management interfaces that are provided by the management module (the command line interface and web interface), you can: Display a graphical representation of the stack and quickly view the status of each hub and its ports.

  • Page 25: Management Of The Distance Extender Modules

    It also allows you to perform remote monitoring using RMON. For more information about Transcend Enterprise Manager and other 3Com SNMP network management applications, refer to Network Management” RMON, refer to...

  • Page 26: How You Can Manage The Dual Speed Hub 500

    2: M HAPTER ANAGING THE How You Can Manage the Dual Speed Hub 500 The management module includes two complete management interfaces for the Dual Speed Hub 500, that you can access locally (through the console port on the Dual Speed Hub 500) or remotely (over the network): Command line interface —...

  • Page 27: Snmp Network Management

    3Com network from a single management station. Using intelligent 3Com software distributed throughout the network (TranscendWare today’s platforms and manage a wide variety of 3Com products. For further information about which Transcend management application can benefit your growing network, call your local sales office;...

  • Page 28: Methods Of Management

    You can only use the RMON features of the hub if you have an RMON management application, such as the RMON application supplied with 3Com’s Transcend Enterprise Manager, or using a MIB browser. RMON and the RMON capabilities of the Dual Speed Hub 500 are...

  • Page 29: Requirements For Managing Over The Network

    Figure 4 Different Management Connections to the Stack Requirements for Managing Over the Network When managing your stack over the network, you must remember that (regardless of your method of management): The stack must be correctly configured with IP information. You must make a direct management connection through the console port to do this (or use a BOOTP server).

  • Page 30: Ip Addresses

    2: M HAPTER ANAGING THE the network, the port through which your communication reaches the stack must not be disabled by management. 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 31: Command Line Interface

    Command Line Interface The command line interface allows you to configure a limited set of parameters for the unit. You can access the command line interface: Through the console port Over the network This section has information on accessing the command line interface.
  • Page 32 2: M HAPTER ANAGING THE To connect your equipment: 1 Connect the serial port on your terminal or management station to the console port on the unit, 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 unit.
  • Page 33 5 Click in the main HyperTerminal window and press Return twice to start the communication. Terminal Terminal can usually be found from the Main window, in the Accessories program group. To start a Terminal session (after connecting to the unit’s console port): 1 Double-click on the ‘Terminal’...

  • Page 34: Over The Network

    2: M HAPTER ANAGING THE 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 command line interface management sessions at the same time.

  • Page 35: Web Interface

    If your management station is running Windows 95, you must use a SLIP driver that sets up SLIP access for web interface management. A suitable SLIP driver (the 3Com serial web utility) is supplied on the CD-ROM that accompanies the management module. To install and...
  • Page 36 2: M HAPTER ANAGING THE Suitable Web browsers are: Netscape Navigator Version 3.0 or later Microsoft Internet Explorer Version 3.0 or later For information on using your Web browser, or finding out what it supports, refer to the documentation that accompanies it or visit the Web site of the company that produces your Web browser.

  • Page 37: Using The Command Line Interface

    NTERFACE This chapter describes how to use the command line interface. The command line interface is a quick and simple interface which allows you to enter various IP address settings, reset the stack and initialize the stack. The web interface can perform most of the tasks that the command line interface can do.

  • Page 38: Initial Access

    3: U HAPTER SING THE Initial Access The Login: prompt is displayed. As the initial user, enter the default user name admin and press Return at the Password: prompt. The first time you access the command line interface using the Admin level, there is no password. CAUTION: Your system is open to anyone until you set a password for the Admin level.

  • Page 39: Logging Off

    (Dual Speed Hub 500 and Marketing (1) in this example). Figure 5 Top-level Menu Menu options: ----------3Com SuperStack II Dual Speed Hub 500----------- ethernet logout snmp system Type ? for help.

  • Page 40: Menu Structure

    3: U HAPTER SING THE Menu Structure Figure 6 shows the menu/command structure for the command line interface. A number of new commands and their hierarchies were introduced with version 2 agent. These are: The ethernet commands — autoNegotiation, detail, portMode, security, segment and smartAutosensing All snmp commands The system commands —...
  • Page 41 Figure 6 Command Line Interface Menu Structure Top-level menu ethernet autoNegotiation detail portMode portState security segment smartAutosensing summary initializeConfig interface ping logout snmp community next trap system capture display information initialize inventory password remoteAccess reset security softwareUpgrade unit Using the Menus cascadeConnection detail label...

  • Page 42: Navigating The Menus And Entering Commands

    3: U HAPTER SING THE From the top-level menu, you can access four sub-menus: Ethernet Menu — From here you can enable or disable ports, view status information about them, and configure Smart auto-sensing for the entire stack. IP Menu — From here, you can configure IP parameters and PING other devices in your network.

  • Page 43: Quick Guide To The Commands

    Entering Commands When you reach the menu level containing the specific command you want to enter, you are prompted for a command name. Commands can also be entered at the end of the menu string. Where applicable, default values for commands are shown in parentheses after the prompt.
  • Page 44 3: U HAPTER SING THE Table 5 Command Line Interface Commands (continued) Command segment cascade- Connection detail label summary switch switchState smartAutosensing summary IP Menu initializeConfig interface bootp define display ping SNMP Menu community next (continued) OMMAND NTERFACE What does it do? Connects or disconnects a segment from the cascade unit.
  • Page 45 Table 5 Command Line Interface Commands (continued) Command trap define display modify remove System Menu capture display information initialize inventory password remoteAccess reset access display Displays the access rights for all access security access modify user define user display user modify user remove softwareUpgrade (continued)

  • Page 46: Commands

    3: U HAPTER SING THE Table 5 Command Line Interface Commands (continued) Command unit Commands The remaining sections in this chapter describe the management functions that can be carried out from the command line interface. Changing the Password We recommend that setting a password is the first task you carry out on the unit.
  • Page 47 Setting System Information These commands allow you to set a system name, contact and location for all units in a stack. At the Top-level menu enter: system information The CLI prompt shows you the current system information in square parentheses, and allows you to set the new information: Enter system name Enter system Enter system...
  • Page 48 3: U HAPTER SING THE Enter the community string [<user>]: 6 Enter a community string for the new user. Displaying User Details You can display the user details for the stack using the display command on the System/Security/User menu. It is recommended that all of the default passwords are changed. To display the user details for the stack: From the Top-level menu, enter: system security user display...
  • Page 49 Re-enter the password: 4 Enter the password for the user again. The following prompt is displayed: Enter the community string [<user>]: 5 Enter a community string for the user. Removing User Details You can remove user details from the stack using the remove command on the System/Security/User menu.

  • Page 50: Configuring Another Unit In The Stack

    3: U HAPTER SING THE The following prompt is displayed: Enter access level (monitor,manager,security): 2 Enter the access level to be modified. The following prompt is displayed: Enter new value for SNMP (enable,disable) [enable]: 3 Enter enable if the access level allows SNMP management, or disable if it does not.
  • Page 51 Configuring the Unit’s IP Information Before you can manage the unit or stack over the network, you must assign it an IP address and subnet mask. You may also need to enter a default gateway (sometimes known as the default router) address. The default router is the router (if you have one) that is used by the stack to communicate with other networks.

  • Page 52: Viewing The Configuration

    SLIP address and SLIP subnet mask for the unit. Displaying the Administration Information At the top-level menu, enter: system display The command line interface displays information similar to this example: 3Com Dual Speed Hub 500 (3C16611) Unit Name: Marketing Location: Top floor Contact: James OMMAND NTERFACE...
  • Page 53 Time since reset: 2 days, 3 hours, 10 minutes Operational Version: 2.14 Hardware Version: 2.00 Boot Version: 1.00 MAC Address : 08:00:4e:4f:9c:42 Product Number : 3C16611 Serial Number: 2103332 In the example above, you will see the term ‘Operational Version”. This is the same as the software agent version.

  • Page 54: Configuring The Unit's Ports

    3: U HAPTER SING THE Configuring the Unit’s Ports You can view and change information about the ports on the unit using the command line interface. You can: Enable and disable the ports. View information about the status of the ports. To view and change information about the ports on another unit in the stack, use the unit command to change unit;...
  • Page 55 If there is a high number of errors, it could indicate that there is faulty equipment somewhere on the network segments that are connected to the ports, or that the network is badly configured. Displaying and Changing Port Information From the Ethernet sub-menu you can display information about your network since the Hub was last reset, initialized or powered off/on.
  • Page 56 3: U HAPTER SING THE Enabling and Disabling Auto-negotiation Auto-negotiation is a system that allows the Hub to automatically detect the speed of twisted pair links, and thereby set the speed of its twisted pair ports. If auto-negotiation is enabled on a 10BASE-T/100BASE-TX port, the speed of the link is automatically detected and set accordingly.
  • Page 57 Commands The screen shows the following statistics: Good Frames — This is the total number of frames with no errors seen at the port. Examining this statistic regularly can help you monitor your network’s overall performance. For example unusual increases in traffic rate may indicate a potential problem. Good Octets —...
  • Page 58 3: U HAPTER SING THE OMMAND NTERFACE operating correctly, check the cable and cable connections for breaks or damage. Frames Too Long — These are frames that exceed the maximum size for Ethernet frames (1518 octets). If you see a high number of such frames you will need to isolate the source of these frames and examine the transceiver or adapter card at the device.
  • Page 59 Total Errors — This number should be a small proportion of the Good Frames number. It is the sum of the following errors seen at the port: FCS Errors FCS Alignment Errors Short Events Frames Too Long Very Long Events Data Rate Mismatches Late Events Specifying the Speed of a Port...
  • Page 60 3: U HAPTER SING THE Need to Know (NTK) In normal Hub operation, packets received are sent to all ports irrespective of the packet destination address. With NTK enabled, the Hub sends a packet to its destination address, but will scramble it when sending the packet to all the other secure ports.

  • Page 61: Ethernet Segment Management

    b If you have entered required. You are then prompted with the following: Enter Disconnect Unauthorized Device mode (enable,disable) [disable]: Enable or disable DUD as required. Ethernet Segment Management Naming an Ethernet Segment The label command allows you to create a name (or label) for a segment.
  • Page 62 3: U HAPTER SING THE OMMAND NTERFACE The screen shows the following statistics: Octets — This is the number of octets transmitted/received on this segment. This calculation includes the MAC header and FCS, but excludes preamble/Start-of-Frame Delimiter. Frames — This is the total number of frames since last reset. Examining the statistic regularly can help you monitor network traffic.
  • Page 63 of these packets and examine the transceiver or adapter card at the device. Some protocols may generate these packets. Fragments — The total number of packets received that were not an integral number of octets in length or that had a bad Frame Check Sequence (FCS), and were less than 64 octets in length (excluding framing bits but including FCS octets).
  • Page 64 3: U HAPTER SING THE Managing the Ethernet Segment Cascade Connection When you connect 10Mbps and 100Mbps equipment to the unit, the ports are automatically connected to the relevant segment. The segment switch joins the 10Mbps and 100Mbps segments so that all of the equipment connected to the segments can communicate.
  • Page 65 Configuring the Switch Between Segments You can enable or disable the segment switch between segments using the ethernet segment switch switchState command. 1 At the Top-level menu enter: ethernet segment switch switchState The following prompt is displayed: Enter new value (autoConfigure,disabled) [autoConfigure]: 2 Enter the new value as required.

  • Page 66: Resetting The Stack

    3: U HAPTER SING THE To configure Smart auto-sensing: 1 At the top-level menu, enter: ethernet smartAutosensing 2 You are prompted for the stack’s new Smart auto-sensing state: Enter new value (enable, disable) [enable]: Enable or disable Smart auto-sensing as required. Resetting the Stack Resetting the stack simulates powering off and powering on the stack.

  • Page 67: Enabling And Disabling Remote Access To The Stack

    To initialize the stack: 1 At the top-level menu, enter: system initialize 2 The command line interface asks you to confirm the initialize. Enter y if you wish to proceed, or n if you want to stop the initialize. During an initialize, you are unable to communicate with the stack. After the initialize, press Return twice to restore communication (if required).

  • Page 68: Using Ping To Test The Connections To Other Devices

    3: U HAPTER SING THE If you have a Dual Speed Hub 500 with a serial number less than 0600/00000000000, upgrading the software to version 2.1x or above will not give you support for the RMON Filter and Capture groups on the 100Mbps segments, which means that you cannot perform RMON Filter Capture for the 100Mbps segments.

  • Page 69: Upgrading The Management Software

    Do you wish to continue (yes/no) [no]: 2 Enter yes to reset the IP configuration. Upgrading the Management Software When 3Com issues a new version of the management software agent for the Dual Speed Hub 500, you can upgrade the units in your stack.

  • Page 70: Displaying And Changing Snmp-Related Information

    3: U HAPTER SING THE A power interrupt during the software upgrade may cause a corrupted agent image on the hub. If this occurs then subsequent rebooting of the unit will be unsuccessful and the power LED will flash. In this event the software should be updated using the Update Utility”.
  • Page 71 snmp trap define You are then prompted to enter the trap community string: Enter the trap community string [monitor]: 2 You are then prompted to enter the trap destination address: Enter the trap destination address: Displaying Trap Destination Details You can display the community string and IP addresses of the current trap destinations using the display command on the SNMP/Trap menu.
  • Page 72 3: U HAPTER SING THE Enter the trap destination address [<ip address>]: 4 Enter the new IP address of the trap destination. Removing Trap Destination Details You can remove the details of a current trap destination device using the remove command on the SNMP/Trap menu. To remove trap destination details: 1 At the Top-level menu, enter: snmp trap remove...

  • Page 73: Using The Web Interface

    Windows 95 management station (connected to the console port of a unit in the stack), you must use a SLIP driver that sets up SLIP access for web interface management. A suitable SLIP driver (the 3Com serial web utility) is supplied on the CD-ROM that accompanies the management module;...
  • Page 74 4: U HAPTER SING THE Where nnn.nnn.nnn.nnn is: The SLIP address for the stack, which is ‘192.168.101.1’ by default, if managing through the console port The IP address for the stack, if managing over the network For example, to access a stack with an IP address of ‘192.168.100.8’ you would enter: http://192.168.100.8/ 4 When the browser has located the stack, a password panel is...

  • Page 75: About The Web Interface

    While managing the stack, you can use your Web browser to look at other Web pages or interfaces, and then simply use the back button to re-access the web interface. You do not need to re-enter your user name and password when doing this. At the start of your management session, the web interface displays one of two pages, as shown in Getting Started page —...

  • Page 76: Management Categories

    4: U HAPTER SING THE Some fields are only displayed after a software upgrade failure. These provide information about the software upgrade. Figure 9 Components of the Web Interface External links Management categories Side bar Page If you click on the: Management categories (on the side bar) —...

  • Page 77: External Links

    Table 7 Units in the Stack Icon External Links Table 8 shows the external links that appear on the banner. You can also click on the 3Com logo to display the 3Com Web site. Table 8 General Icons Help Documentation...

  • Page 78: Page Components

    Documentation” If you do not have a connection to the Internet, your Web browser is unable to display 3Com pages from the external links (3Com Library, 3Com Contacts, 3Com Support). Page Components When you click on the management categories or stack icon, the page area changes to show various kinds of information.

  • Page 79: Web Interface Map

    Web Interface Map Figure 10 shows how the pages in the web interface are linked. The page number under each box is where the description is in this chapter. Figure 10 Web Interface Map Unit Unit Status Management Addresses Management Settings Configuration Health Management of an Attached Stack...

  • Page 80: Using The Web Interface

    4: U HAPTER SING THE Using the Web Interface To display management category pages: 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 to the information on the current page and click Apply when finished.

  • Page 81: User Access Levels

    Figure 12 Areas of the Unit View If you click on: The unit (but not on a port or button) — The Unit Status page is redisplayed. A 10BASE-T or transceiver module port — The Port Setup page is displayed for that port. The console port —...

  • Page 82: Online Help System And Documentation

    4: U HAPTER SING THE Online Help System and Documentation The CD-ROM supplied with the management module has an online help system and online documentation which can be used with the web interface: The online help system is in Web format (HTML) so when it is launched, it appears in your Web browser.

  • Page 83: Unit Pages

    Unit Pages This section describes the fields that appear on the pages in the Unit category. The first page displayed is the Unit Status page (together with the Unit View). Unit View The Unit View is a graphical version of the unit, as shown in Figure Figure 13 Unit View To refresh the Unit View (to show any new changes), click Refresh.

  • Page 84: Unit Status

    Boot PROM Version The version of software on the Boot PROM inside the unit. Product Number Displays the 3Com product number of the unit. TFTP Server (optionally displayed) Displays the IP address of the last TFTP server used to upgrade the unit’s management software.

  • Page 85: Management Address

    Unit Pages To display the Management Addresses page, click IP Setup at the bottom of the Unit Status page. Management Address This page specifies a unique IP address for the unit (which can be used to access the stack over the network), as shown in Figure If you have no previous knowledge of IP, refer to “IP Addresses”...

  • Page 86: Port Setup

    4: U HAPTER SING THE NTERFACE Port Setup This page specifies the port state (enable or disable), port speed, link state and partition state of the port, as shown in Figure Figure 15 Port Setup Page The fields are: Connector Type Shows the type of cable connector used to connect to the port.

  • Page 87: Console Port Configuration

    Unit Pages (auto-negotiation). We recommend that you keep this setting so that you have maximum flexibility when connecting devices to the unit. The front panel ports on the Dual Speed Hub 500 and any transceiver modules (that are used in the transceiver module slots) can only operate in half duplex mode (shown by ‘HD’).

  • Page 88: Segment Configuration

    4: U HAPTER SING THE NTERFACE CAUTION: Do not change any of these settings unless you fully understand what you are doing. Incorrect settings may lock you out from the unit’s console port, and you may have to contact your supplier for information on recovering management communication if you cannot access the unit over the network.
  • Page 89 Unit Pages Figure 16 Segment Configuration The fields are: 10Mbps segment connected to Cascade Allows you to connect or isolate the 10Mbps segment from the 10Mbps cascaded segment that is connected to other units in the stack, as shown in Figure Isolating the segment (unchecking the checkbox) means that 10Mbps traffic received by the unit is not passed on to other units in...
  • Page 90 4: U HAPTER SING THE NTERFACE Figure 17 Connected and Isolated 10Mbps Segments (Logical View) 100Mbps segment connected to Cascade Allows you to connect or isolate the 100Mbps segment from the 100Mbps cascaded segment that is connected to other units in the stack. Figure 17 shows an example of connected and isolated 10Mbps segments.

  • Page 91: Management Settings Pages

    Current State Of Switch Displays the mode of operation for the unit’s internal switch. The switch can be: Operational — The switch is active and passing traffic between the 10Mbps and 100Mbps segments in the unit. Standby — The switch is inactive but will become active if required by the stack (and if the unit is the bottom unit in the stack).

  • Page 92: Getting Started

    4: U HAPTER SING THE Figure 18 Documentation Page The fields are: Help Specifies where the online help system can be found. Enter the appropriate directory or Web address. Examples are: file://f:/help/index.htm http://yournetwork.com/help/index.htm Documentation Specifies where the online documentation can be found.

  • Page 93: Password Setting

    The file path or Web address (URL) for the online help system and documentation files. To enter a new password (you can leave it blank if you don’t want to change it). If you have no previous knowledge of IP, refer to page You do not need to use the Getting Started pages to configure this information, as it can all be configured using other pages in the web...

  • Page 94: System Name

    4: U HAPTER SING THE The fields are: New Password Type the new password you want to use. Confirm Password Retype the password for confirmation. Clear Button Clears the New Password and Confirm Password fields so that you can retype your new password if you make a mistake when typing into those fields.

  • Page 95: Reset

    During an initialize, the Web browser is unable to communicate with the stack. After the initialize, communication is restored. The initialize process takes about 10 seconds. Reset This page is used to reset the stack. Resetting the stack simulates powering on and powering off the stack. You may want to do this if you want to reset the stack’s statistics counters.
  • Page 96 4: U HAPTER SING THE NTERFACE The fields are: Main Link Shows the unit and port number of the main link, and the state of the link. Standby Link Shows the unit and port number of the standby link, and the state of the link. Pair State Shows whether the resilient link pair is operational or not.

  • Page 97: Add Resilient Link

    configure the unit to send traps (messages) to the SNMP network management application, if the states of the links change. Resilient Link Pairs To set up a resilient link pair, you need to manage the stack that both links in the pair are connected to. The number of resilient link pairs you can set up is only restricted by the number of ports you have in the stack.

  • Page 98: Smart Auto-Sensing

    4: U HAPTER SING THE NTERFACE Smart Auto-sensing You can use the Smart Auto-sensing page to configure Smart auto-sensing for the stack, as shown in Figure 21. By default, Smart auto-sensing is enabled for the stack. Smart auto-sensing checks the quality of any new 100Mbps connection made to the stack.

  • Page 99: Software Upgrade

    Configuration Pages Software Upgrade When 3Com issues a new version of the management software agent for the Dual Speed Hub 500, you can upgrade the units in your stack. This page is used to upgrade the stack, as shown in...

  • Page 100: Health Pages

    4: U HAPTER SING THE flash. In this event the software should be updated using the Update Utility”. See Health Pages This section describes the fields that appear on the Segment Graphs page in the Health category. Segment Graphs This page shows two graphs for 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 graphs are generated using JAVA.

  • Page 101: Accessing A Different Hub Or Stack

    could indicate that there is faulty equipment somewhere on the network, or that the network is badly configured. Accessing a Different Hub or Stack If a different type of unit or stack is connected to the Dual Speed Hub 500 stack with a Cascade Converter Kit, you can access its management screens from the Dual Speed Hub 500 web interface.
  • Page 102 4: U HAPTER SING THE to the Dual Speed Hub 500 web interface when one of the units in the icon is clicked. Figure 25 Cascade Module Attached Unit(s) Page 2 In the IP Address field, specify the IP address of the attached stack (for example a Hub 10 stack) and click Launch Telnet Session.

  • Page 103: Configuring Your Browser

    The attached stack’s management session in the Telnet application is completely separate from the web interface, so you can: Launch multiple Telnet sessions — this is restricted by the number of management sessions allowed by the attached stack’s management. Continue to manage the Dual Speed Hub 500 stack while managing the attached stack.
  • Page 104 4: U HAPTER SING THE NTERFACE...

  • Page 105: Problem Solving

    ROBLEM The Dual Speed Hub 500 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. This chapter has information on solving management problems, that involves the use of the management module.

  • Page 106: Isolating A Problem

    5: P HAPTER ROBLEM Isolating a Problem A good way of isolating a problem is to see whether it occurs on a particular port only. This can be done by: Using a different port to see if the problem still exists. Using management to view how a port has been set up.

  • Page 107: Solving Problems With The Web Interface

    The Web browser cannot access the stack through the console port. Check that: If you have a management station running Windows using the 3Com serial web utility (SLIP Driver). Refer to Appendix You are using the correct SLIP address and SLIP subnet mask. The default SLIP address is ‘192.168.101.1’, and the default SLIP...
  • Page 108 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). Check that it is installed correctly. Refer to Some of the web interface is not displayed in the Web browser after downloading.
  • Page 109 Solving Problems With the Web Interface make a small configuration change to your Web browser; refer to “Configuring Your Browser” page The Unit View shows a TP connector with a red cable. This particular 100Mbps connection has been downgraded to a 10Mbps connection by the Smart auto-sensing feature (indicated by the red cable), as it a poor quality connection and performs better at 10Mbps.

  • Page 110: Solving Problems With An Snmp Network Management Application

    5: P HAPTER ROBLEM Solving Problems With an SNMP Network Management Application The SNMP network management application cannot access the stack. Check that: The stack’s IP address, subnet mask and default router are correctly configured, using either: The command line interface — refer to Information”...

  • Page 111: Abling And Management Settings

    ABLING AND ETTINGS Management Settings Table 9 shows the settings you need to set your management station’s serial port to, if you are managing the Dual Speed Hub 500 directly through its console port. Table 9 Management Station Settings Data bits (character size) Stop bit Parity Cabling...
  • Page 112 A: C PPENDIX ABLING AND Straight-through Figure 27 Straight-through 10BASE-T and 100BASE-TX Cabling TxD+ TxD- RxD+ RxD- Pins 4, 5, 7 and 8 are not used Crossover Figure 28 Crossover 10BASE-T and 100BASE-TX Cabling TxD+ TxD- RxD+ RxD- Pins 4, 5, 7 and 8 are not used ANAGEMENT ETTINGS Network Interface...

  • Page 113: Console Cable

    Cabling Console Cable Figure 29 Pin Numbering for Console Examples of Null Modem Cables You Can Use Figure 30 Example of Null Modem Cabling for 9-pin Management Station...

  • Page 114: Modem Cable

    A: C PPENDIX ABLING AND ANAGEMENT ETTINGS Figure 31 Example of Null Modem Cabling for 25-pin Management Station Modem Cable Figure 32 Example of Modem Cabling for 25-pin Management Station...

  • Page 115: Cascade Connections

    Cascade Connections Cascade cables are available in a range of lengths from your supplier. There are also Hot Swap Cascade Units which increase the resilience of your cascade connections, and Converters which enable you to connect PS Hubs and a Hub 10 stack to your Dual Speed Hub 500 stack.
  • Page 116 A: C PPENDIX ABLING AND ANAGEMENT ETTINGS...

  • Page 117: Utility

    If you are using a management station running Microsoft Windows ® the unit’s console port, you must use the 3Com serial web utility (SLIP Driver) supplied on the CD-ROM that accompanies the management module. The 3Com serial web utility only works on Windows 95 or 98.
  • Page 118 B: S PPENDIX ERIAL 4 In the Run dialog box, type drive:\Win95\Drivers\Slip\ SETUP (where drive is the letter of your CD-ROM drive) and click OK. The installation program starts and checks your system configuration; enter any information that is requested. If the setup program cannot find specific files on your management station, it asks you to insert your Windows CD-ROM.

  • Page 119: 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 on Finish to close the dialog box. 7 You are asked if you want to restart Windows so that it can use the new settings you have configured.

  • Page 120: Solving Problems With The Serial Web Utility

    B: S PPENDIX ERIAL 4 The connection is successful if the web interface’s password panel is displayed. You are now ready to manage the unit; refer to Interface”. Solving Problems With the Serial Web Utility If you are unable to connect to the unit’s web interface, it may be that: The unit is not powered on.

  • Page 121: Rmon

    RMON features supported by the unit. You can only use the RMON features of the unit if you have an RMON management application, such as the RMON application supplied with 3Com’s Transcend browser. RMON is the common abbreviation for the Remote Monitoring MIB...

  • Page 122: About The Rmon Groups

    Both rising and falling thresholds are supported, and thresholds can be on the absolute value of a variable or its delta value. In addition, the 3Com SmartAgent allows alarm thresholds to be autocalibrated. Alarms are used to inform you of a network performance problem and they can trigger automated action responses through the Events group.
  • Page 123 What is RMON? Hosts Top N The Hosts Top N group extends the Hosts table by providing sorted host statistics, such as the top 20 nodes sending packets or an ordered list of all nodes according to the errors they sent over the last 24 hours.

  • Page 124: Benefits Of Rmon

    RMON and the Dual Speed Hub 500 RMON requires one probe per LAN segment, and stand-alone RMON probes have traditionally been expensive. Therefore, 3Com’s approach has been to build an inexpensive RMON probe into the SmartAgent widely deployed around the network without costing more than traditional network management.

  • Page 125: Rmon Features Of The Dual Speed Hub 500

    One other problem with stand-alone RMON probes is that they are passive; able to monitor and report, but nothing more. Placing probe functionality inside the network device allows integration of RMON with normal device management to allow proactive management. As an example, statistics can be related to the segments and the unit can take autonomous actions such as disabling a port on a segment (temporarily or permanently) if errors on that segment exceed a pre-defined threshold.

  • Page 126: Default Events

    C: RMON PPENDIX Default Events Table 12 details the default read-only events for the unit. Table 12 Default Read-only Events for the Unit Description of Event No action Send trap Turn port off for 5 seconds, notify network management application Turn port off, notify network management application Turn port on, notify network management application Turn port off for 5 seconds...

  • Page 127: D Serial Update Utility

    ERIAL The Serial Update Utility (also known as the Management Agent Upgrade Utility) can be used to update the Management Agent of selected SuperStack the latest version of the utility on it. You would only use this utility if a previous software update has failed and you are unable to communicate with your hubs using the management interfaces.
  • Page 128 D: S PPENDIX ERIAL d Change your directory to the 'update' directory on the hard drive. 4 At the MS-DOS prompt, enter the update command: update <file> <file> is the name of the management software file. Note that the software files have the format zzzxx_yy.bin, where: zzz is an abbreviation for the unit.

  • Page 129: Solving Problems With The Serial Update Utility

    Solving Problems With the Serial Update Utility If you have any problems using the update utility, use the following actions to solve your problems. An error occurs when the utility attempts to connect through the serial port of the PC. Meaning: The serial port being used is not the same as the serial Action: An error occurs when the utility attempts to communicate...
  • Page 130 D: S PPENDIX ERIAL The error message USAGE: update [-c comport] filename is displayed. Meaning: You are not specifying the correct number of parameters Action: An error occurred when the utility tried to transfer the file. There could be a number of reason for this: The null modem cable has become disconnected from the hub or the PC during the file transfer.

  • Page 131: Support

    For the most recent information, 3Com recommends that you access the 3Com Corporation World Wide Web site. Online Technical Services 3Com offers worldwide product support 24 hours a day, 7 days a week, through the following online systems: World Wide Web site...

  • Page 132: 3Com Ftp Site

    3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the 3Com public FTP site. This service is available 24 hours a day, 7 days a week. To connect to the 3Com FTP site, enter the following information into...
  • Page 133 3Com technical telephone support phone number at the location nearest you. When you contact 3Com for assistance, have the following information ready: Product model name, part number, and serial number A list of system hardware and software, including revision levels...
  • Page 134 E: T PPENDIX ECHNICAL Country Telephone Number North America 1 800 NET 3Com (1 800 638 3266) Enterprise Customers: 1 800 876-3266 UPPORT Country Telephone Number...

  • Page 135: Returning Products For Repair

    Returning Products for Repair Before you send a product directly to 3Com for repair, you must first obtain an authorization number. Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’s expense. To obtain an authorization number, call or fax:...
  • Page 136 E: T PPENDIX ECHNICAL UPPORT...

  • Page 137: Glossary

    LOSSARY 10BASE-T This is a technical specification used for Ethernet networks. 10BASE-T is part of the IEEE standards body specification for Ethernet (10Mbps) over Category 3, 4 or 5 twisted pair cable (two pairs of wire — one pair for transmitting data and the other for receiving data). 10BASE-T has a distance limit of approximately 100m (328ft) per segment.
  • Page 138 LOSSARY broadcast A message sent to all destination devices on the network. broadcast storm Multiple simultaneous broadcasts that typically absorb available bandwidth and can cause network failure. cascaded segments The segments that run up and down the stack by the cascade cables, to which the Dual Speed Hub 500 units’...
  • Page 139 half duplex The term half duplex is used to describe data transmission that can occur in two directions over the same communications link, in only one direction at a time. HTTP HyperText Transfer Protocol. The client/server protocol used to connect servers on the World Wide Web. Internet The name given to a public network which spans the world and consists of thousands of pieces of network equipment.
  • Page 140 LOSSARY line speed See baud rate. main port The port in a resilient link that carries data traffic in normal operating conditions. Management Information Base. Stores a device’s management characteristics and parameters. MIBs are used by Simple Network Management Protocol (SNMP) to contain attributes of their managed systems.
  • Page 141 Intelligent management agents in devices and logical connectivity systems that reduce the computational load on the network management station and reduce management-oriented traffic on the network. SmartAgent is a 3Com product. SNMP Simple Network Management Protocol. A protocol originally designed to be used in managing TCP/IP internets. SNMP is presently...
  • Page 142 ® 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 143 See World Wide Web. World Wide Web The World Wide Web (often known as the ‘Web’) is a global network which is part of the Internet. It is made up of thousands of different ‘Web pages’ and ‘Web sites’ (collections of Web pages) which are inter-linked.
  • Page 144 LOSSARY...
  • Page 145 100BASE-TX cable 111 100Mbps 87 segment 64, 90 10BASE-T cable 111 10Mbps 87 segment 89 3Com Knowledgebase Web Services 131 3Com serial web utility 117 3Com URL 131 about resilient links 96 access levels 38, 81 accessing another unit in the stack 50...
  • Page 146 NDEX IP information 51 password 46 ports 54 resilient links 95 segment switch 88 segments 88 Web browser 36, 103 connections console port 32 testing 68 connector type 86 console cable 113 console port command line interface management 31 connecting to 32 management 28 settings 31, 111 web interface management 35...
  • Page 147 hardware versions 84 Health pages 100 help command line interface 43 web interface 91 how the management module can be used 18 Hub 10 17, 25 management 101 HyperTerminal application 32 icon, stack 77 identifying which ports are on a segment 84 in-band management 28 initial access to the command line...
  • Page 148 NDEX command line interface management 34 loop 83 management 28 mask 85 testing connections 68 web interface management 35 network supplier support 132 new commands 40 new Smart auto-sensing 16 null modem cable 113 obtaining help 43, 82 registered IP address 30 online help system and documentation 82, online technical services 131 operational version 53...
  • Page 149 96 switch mode 90 switch, segment 88 system information, displaying 52 System Name page 94 TCP/IP 35 technical support 3Com Knowledgebase Web Services 131 3Com URL 131 network suppliers 132 product repair 135 Telnet 34 terminal 88...
  • Page 150 NDEX defaults 38 using agent upgrade utility 127 management module 18 serial web utility 119 Telnet 34 terminal emulator 32 web interface 73, 80 utilization 100 version agent software 84 hardware 84 Transcend software 27 version,agent software 22 viewing configuration 52 graphs 100 ways of using the management module 18 address 73...
  • Page 151 If it appears that any product that is stated to meet this standard does not perform properly with regard to such date data on and after January 1, 2000, and Customer notifies 3Com within ninety (90) days of IMITED ARRANTY ®...
  • Page 152 (48) hours of installation but no later than thirty (30) days after the date of purchase, and this is verified by 3Com, it will be considered dead- or defective-on-arrival (DOA) and a replacement shall be provided prior to...
  • Page 153 3Com’s response to a request for telephone technical support will be in the form of a return call froma 3Com representative by close of business the following business day, defined as 9 a.m.
  • Page 154 EGULATORY OTICES 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 TATEMENT against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 155 BSMI TATEMENT...

This manual is also suitable for:

Dual speed hub 500 mgmt moduleDual speed hub 500

Table of Contents