3Com SuperStack 3C16115 User Manual
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3Com SuperStack 3C16115 User Manual

3Com SuperStack 3C16115 User Manual

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SuperStack
Webcache 1000 (3C16115)
Webcache 3000 (3C16116)

User Guide

http://www.3com.com/
Part No. DUA1611-5AAA02
Published May 2001
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  • Page 1: User Guide

    SuperStack Webcache 1000 (3C16115) Webcache 3000 (3C16116) User Guide http://www.3com.com/ Part No. DUA1611-5AAA02 Published May 2001 ®...
  • Page 2 All other company and product names may be trademarks of the respective companies with which they are associated. ENVIRONMENTAL STATEMENT It is the policy of 3Com Corporation to be environmentally-friendly in all operations. To uphold our policy, we are committed to: Establishing environmental performance standards that comply with national legislation and regulations.

  • Page 3: Table Of Contents

    Conventions Related Documentation Documentation Comments Product Registration ETTING TARTED NTRODUCING THE What is the Webcache? The Webcache and 3Com Network Supervisor Webcache — Front View Detail LEDs Webcache — Rear View Detail Power Socket Console Port WAN Port LAN Port...
  • Page 4 Proxy Cache Transparent Cache Migrating from Proxy Cache to Transparent Cache Mode Deploying the SuperStack 3 Firewall as a Proxy Forwarder Setting Up the Webcache for Management Before You Begin Setting Up Using the Web Interface Setting Up Using the Command Line Interface Getting Started Wizard Settings Connecting the Webcache to the Live Network Choosing the Correct Cables...
  • Page 5 The Device View The Help View The Navigation Tree The Information Area YSTEM Configuring the System Time What is the Network Time Protocol? Choosing a Network Time Protocol Server Configuring the System Time Using the Network Time Protocol Configuring the System Time Manually System Time and Performance Graphs ECURITY What are Passwords?
  • Page 6 SNMP Traps Configuring SNMP Traps ERFORMANCE What is Performance Monitoring? Caching Performance Graphs System Performance Graphs I/O Performance Graphs YSTEM IAGNOSTICS What are System Diagnostics? Pinging Other Devices Performing a Ping Tracing IP Addresses Performing a Trace Route System Log Configuring the System Log What is a Syslog Server? Obtaining a Syslog Server...
  • Page 7 III C OMMAND OMMAND NTERFACE Accessing the Command Line Interface Accessing the Command Line Interface Through the Console Port Accessing the Command Line Interface Over the Network Logging In To the Command Line Interface Exiting the Interface Understanding the Command Line Interface Entering Commands Displaying Menus Obtaining Help...
  • Page 8 Cable Specifications Pin-outs Null-Modem Cable PC-AT Serial Cable Modem Cable RJ-45 Pin Assignments ECHNICAL PECIFICATIONS ECHNICAL UPPORT Online Technical Services World Wide Web Site 3Com Knowledgebase Web Services 3Com FTP Site Support from Your Network Supplier Support from 3Com NDEX OUTS...
  • Page 9 Returning Products for Repair LOSSARY NDEX OFTWARE GNU G ENERAL UBLIC EGULATORY OTICES ICENSE GREEMENT 2, J ICENSE ERSION 1991...

  • 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: Conventions

    BOUT UIDE Conventions Table 1 and Table 2 list conventions that are used throughout this guide. Table 1 Notice Icons Table 2 Text Conventions Icon Notice Type Description Information note Information that describes important features or instructions Caution Information that alerts you to potential loss of data or potential damage to an application, system, or device Warning Information that alerts you to potential personal injury...

  • Page 13: Related Documentation

    Webcache 1000/3000 Release Note These notes provide information about the current software release, including new features, modifications, and known problems. Documentation accompanying 3Com Network Supervisor. This is supplied on the CD-ROM that accompanies the Webcache. Document title Document part number (on the title page)

  • Page 14: Product Registration

    3Com product documentation at this e-mail address. Questions related to technical support or sales should be directed in the first instance to your network supplier. Product You can now register your SuperStack 3 Webcache on the 3Com Web Registration site: http://support.3com.com/registration/frontpg.pl...

  • Page 15: I Getting Started

    ETTING Chapter 1 Introducing the Webcache Chapter 2 Installing the Webcache Chapter 3 Configuring Web Browsers TARTED...

  • Page 17: Introducing The Webcache

    Webcache? easily configurable webcache appliances. They offer the following benefits to your network: NTRODUCING THE What is the Webcache? The Webcache and 3Com Network Supervisor Webcache — Front View Detail Webcache — Rear View Detail Default Settings ® 3 Webcache 1000 and 3000 are high-performance,...

  • Page 18: The Webcache And 3Com Network Supervisor

    1: I HAPTER NTRODUCING THE The Webcache and The latest version of 3Com Network Supervisor is supplied on the 3Com Network CD-ROM that accompanies the Webcache. 3Com Network Supervisor Supervisor provides powerful, intuitive network management for small to medium enterprise networks. It automatically discovers network devices and reports network activity, stress monitoring and performance metrics for network managers.

  • Page 19: Webcache - Front View Detail

    Webcache — Front Figure 1 Webcache — Front View View Detail Activity LED Cache Storage Link Status Status LED(s) LED(s) Cache Storage Status Link Status The above illustration shows a Webcache 3000. The Webcache 1000 contains a single Cache Storage Device and therefore has one Cache Storage Status LED on the front panel.

  • Page 20: Webcache - Rear View Detail

    1: I HAPTER NTRODUCING THE Activity LED Power/Self test LED Webcache — Rear Figure 2 Webcache — Rear View View Detail WARNING: WAN and LAN RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot be used as standard traditional telephone sockets, or to connect the unit to a traditional PBX or public telephone network.

  • Page 21: Wan Port

    Webcache — Rear View Detail console port uses a standard null-modem cable and is set to 9600 baud, 8 data bits, no parity and 1 stop bit. WAN Port The WAN port is an auto-negotiating 10BASE-T/100BASE-TX RJ-45 port. It is used to connect the Webcache to the network in an inline deployment environment.

  • Page 22: Default Settings

    1: I HAPTER NTRODUCING THE Table 4 LED Behavior Port Activity LED Link Speed LED The Link Speed LED does not change its state if the link is broken. It remains in its current state until a new link is established. Therefore Green Off, Yellow On indicates that no link is present and that the link was previously 100Mbps.
  • Page 23 Feature Webcache 1000/3000 Caching Port 8080 Access Logging Disabled Web Site Blocking Disabled Web Client Blocking Disabled Simple Network Enabled but requires configuration Management Protocol (SNMP) Network Time Protocol Disabled (NTP) Web Browser Disabled Auto-Configuration Upgrade Notification Enabled but requires configuration Upgrade Enabled Detection/Download...
  • Page 24 1: I HAPTER NTRODUCING THE EBCACHE...

  • Page 25: Installing The Webcache

    NSTALLING THE This chapter contains the information you need to install and set up the Webcache 1000/3000. It covers the following topics: Package Contents Choosing a Suitable Site Rack-Mounting the Webcache The Power-up Sequence Deploying the Webcache in Your Network Setting Up the Webcache for Management Getting Started Wizard Settings Connecting the Webcache to the Live Network...

  • Page 26: Package Contents

    The Webcache is accessible and cables can be connected easily. Water or moisture cannot enter the case of the Webcache. Air-flow is not restricted around the Webcache. 3Com recommends that you provide a minimum of 25 mm (1 in.) clearance.

  • Page 27: Rack-Mounting The Webcache

    If the Webcache is installed in a 19-inch rack or closed assembly its local air temperature may be greater than room ambient temperature. Rack-Mounting the The Webcache is 1U high and will fit in most standard 19-inch rack Webcache mounts. CAUTION: The rear of the Webcache must be supported.
  • Page 28 2: I HAPTER NSTALLING THE EBCACHE 3 Attach a rack-mounting bracket to each side of your Webcache using 4 of the screws provided for each bracket, as shown in Figure 5. Figure 5 Fitting a Rack-Mounting Bracket to the Webcache...
  • Page 29 4 Use an adjustable bracket to secure a rack-mounting rail to the rear of your rack as shown in Figure 6. To do this: a Slide the adjustable bracket onto the rack-mounting rail and attach it using two of the screws provided at a position suitable for your rack. b Use rack-nuts (not supplied) to attach the rack-mounting rail and adjustable bracket assembly to the rear of your rack.
  • Page 30 2: I HAPTER NSTALLING THE 5 Attach the rack-mounting rail to the front of the rack. To do this: a Insert two screws through aligned openings in the front plate, rack b Tighten the screws with a suitable screwdriver. Figure 7 Fitting a Rack-Mounting Rail to the Front of the Rack 6 Repeat step 4 and step 5 for the other side of the rack.

  • Page 31: The Power-Up Sequence

    7 Slide the rack-mounting brackets on the sides of the Webcache into the rack-mounting rails. 8 Secure the front of the Webcache to the rack with the captive thumbscrews, as shown in Figure 8. Figure 8 Attaching the Webcache to the Rack 9 Ensure that the ventilation holes in the Webcache are not obstructed.

  • Page 32: Checking For Correct Operation Of Leds

    2: I HAPTER NSTALLING THE CAUTION: The Webcache has no ON/OFF switch; the only method of connecting or disconnecting mains power is by connecting or disconnecting the power cord. Checking for Correct During the power-up of the Webcache, all ports on the Webcache are Operation of LEDs disabled, all of the LEDs light and the Power/Self test LED flashes green When the power-up has completed, check the Power/Self test LED to...

  • Page 33: Deploying The Webcache In Your Network

    The Webcache can be deployed in two ways: Network CAUTION: 3Com recommends that you deploy your Webcache on the LAN side of a firewall, or on the SuperStack 3 Firewall's DMZ port as described in “Deploying the SuperStack 3 Firewall as a Proxy Forwarder”...

  • Page 34: Transparent Cache

    2: I HAPTER NSTALLING THE EBCACHE In the Proxy Cache deployment the Webcache is connected to an Ethernet switch in your LAN. You must configure the Web browser on each client machine in your network to explicitly direct its Web requests to the Webcache.

  • Page 35: Migrating From Proxy Cache To Transparent Cache Mode

    If the Webcache fails, the Layer 4 device will detect the failure and redirect Web requests to the WAN, if the device supports Webcache health-checks, ensuring that access to the Web is maintained. Deploying the Webcache in Transparent mode has benefits for the security of your network.

  • Page 36: Setting Up The Webcache For Management

    Getting Started Wizard or by selecting Device View > System > Caching > Set Caching Mode from the Web interface. value). more advanced filtering abilities and is able to use the 3Com Web Site Filter (3C16111) if installed. Webcache. Setting Up Using the Web Interface — Connect a management workstation to the Webcache over an IP test network or directly via a cross-over cable.

  • Page 37: Before You Begin

    Webcache to your live network. In particular, ensure that the IP settings of the Webcache fit into those of your network. For more information, see “Getting Started Wizard Settings” on page 43. Before You Begin To setup the Webcache for management, you must correctly configure it with the following information.

  • Page 38: Setting Up Using The Web Interface

    2: I HAPTER NSTALLING THE Setting Up Using the You can setup the Webcache for management via the Web interface by Web Interface using a Web browser on a management workstation that is connected to the Webcache over your test network, or directly using a cross-over cable. Setting Up Over the Test Network The Webcache is pre-configured with a default IP address, which is within the range of addresses reserved by the IETF for private IP networks.
  • Page 39 Also the Web interface has been optimised for PC screens with the desktop area set to 800 by 600 pixels. 3Com recommends that you set the font size to Small Fonts. 2 In the Location/Address field of the browser, enter the URL of the Webcache.

  • Page 40: Setting Up Using The Command Line Interface

    2: I HAPTER NSTALLING THE Figure 14 User name and password screen If the user name and password screen is not displayed, see “Solving Web Interface Problems” on page 130. 4 Enter your user name and password. For further information, see “Logging in as a Default User”...
  • Page 41 To setup the Webcache using the Command Line Interface over a test network using Telnet, open a Telnet session using a terminal emulator by specifying the IP address of the Webcache. If you are unsure how to do this, check the documentation supplied with the Telnet facility To connect the Webcache to the test network: The client machine must be in the same subnet as the Webcache to be able to access it using the default IP address.
  • Page 42 2: I HAPTER NSTALLING THE b Tighten the retaining screws on the cable to prevent it from being c Connect the other end of the cable to your terminal, terminal 2 To configure the settings of the terminal, terminal emulator, or modem, see the documentation that accompanies it.

  • Page 43: Getting Started Wizard Settings

    Getting Started The following table shows the settings that you can configure in both the Wizard Settings Web interface and Command Line Interface Getting Started wizards. CAUTION: You must configure the basic settings of the Webcache by completing the Getting Started wizard before you introduce the Webcache to your live network.

  • Page 44: Connecting The Webcache To The Live Network

    Webcache to the live network. Live Network Choosing the Correct 3Com recommends that you use Category 5 cable to connect the LAN Cables port to your network — the maximum segment length for this type of cable is 100 m (328 ft).

  • Page 45: Network Configuration Concepts

    Network The following sections explain certain key concepts of configuring your Configuration network, which you must understand in order to set up the Webcache Concepts successfully. IP Addresses If you are uncertain about what IP addresses to assign your equipment, contact your network administrator.

  • Page 46: Subnets And Using A Subnet Mask

    These bits in the mask are set to 0 if the device is to treat the bit as part of the device number. If you are unsure about what mask to use, 3Com suggest that you contact your network administrator.

  • Page 47: Domain Name System

    Domain Name System Domain Name System Syntax exists on your network, enter the IP address blank. If you set the default router to 0.0.0.0 or leave it blank, the Webcache will only be able to access devices that are in the same subnet as the Webcache.
  • Page 48 2: I HAPTER NSTALLING THE EBCACHE You cannot enter a host name starting or ending with a . (dot) character. It must start and end with a letter or number. You cannot enter a host name containing a space character. Domain Name The domain name must be at least 1 character long.

  • Page 49: Configuring Web Browsers

    This chapter contains information about configuring Web browsers on client machines for use in a Webcache proxy cache deployment. It covers the following alternative methods: For more information about Proxy Cache deployment, see “Proxy Cache” on page 33. No configuration of Web browsers on client machines is required for a Webcache transparent cache deployment;...

  • Page 50: Proxy Auto Configuration (Pac) File Scripts

    Port field. The default port number is 8 Click OK. 3Com recommends that you configure the client machine that you use to manage the Webcache so that it does not use the Webcache as a proxy server. In Internet Explorer, select Tools -> Internet Options ->...
  • Page 51 You can only use a PAC file to configure the Web browsers on client machines when the Webcache is operating in Proxy mode. You can use the Browser Auto-Configuration screen to create a PAC file which is stored on the Webcache. You can configure the PAC file to: Bypass the Webcache for plain host names Use a backup Webcache if the first one fails Directly access the Web if neither the first or second Webcache is...
  • Page 52 3: C HAPTER ONFIGURING 6 Tick Go Direct if no Webcache Available if you want to configure Web browsers to directly access the Web if the main and backup Webcaches fail. Click OK. You must next set the Web browser to read the PAC file for its settings. To set Internet Explorer 5: 1 Open Internet Explorer.

  • Page 53: Web Proxy Auto-Discovery (Wpad)

    (stored in a PAC file) from a server on your network without user intervention. You cannot set up the 3Com Webcache to be used as a WPAD server. The Web Proxy Auto-Discovery (WPAD) protocol is not supported by Netscape Navigator.

  • Page 54: Web Proxy Auto-Discovery Resources

    3: C HAPTER ONFIGURING To configure Internet Explorer 5 to use WPAD: 1 Open Internet Explorer. 2 From the Tools menu, click Internet Options. 3 Click the Connections tab. 4 Click LAN Settings. 5 Tick Automatically detect settings. 6 Click OK. Web Proxy You can view the Internet Draft for the Web Proxy Auto-Discovery Auto-Discovery...
  • Page 55 EBCACHE Chapter 4 Managing the Webcache Chapter 5 System Time Chapter 6 Security Chapter 7 Controlling and Monitoring Web Access Chapter 8 System Events Chapter 9 Performance Monitoring Chapter 10 System Diagnostics Chapter 11 Software Upgrade and Installation EATURES...

  • Page 57: Webcache

    “Command Line Interface” chapter on page 109. Even if you do not intend to actively manage the Webcache, 3Com recommends that you change the default password to prevent unauthorized access to your Webcache. See “Setting Passwords” on page 71 for more information.

  • Page 58: Logging In As A Default User

    Webcache. Table 9 User Names CAUTION: To prevent unauthorized access and configuration of the Webcache, 3Com recommends that you set a password for the admin user name as soon as possible. The admin user name is case-sensitive.
  • Page 59 been optimized for PC screens with the desktop area set to 800 by 600 pixels. It is also recommended to set the font size to Small Fonts. 2 In the Location/Address field of the browser, enter the URL of the Webcache.

  • Page 60: Understanding The Web Interface

    The Web interface is made up of four areas: The Banner The Banner is always displayed at the top of the browser window. It displays the 3Com logo and SuperStack logo. EBCACHE The Banner This is always displayed at the top of the browser window. It displays...

  • Page 61: The Toolbar

    The Help View Click Help to display the Help View. This view allows you to access the Online Help system for the Webcache, additional information from the 3Com Web site and provides specification guidelines for running the Web interface. Device Summary The table is entitled System Summary and displays information for the Webcache.
  • Page 62 4: M HAPTER ANAGING THE The Device View Navigation Tree is displayed on the left side of the browser window and allows you to perform operations for the Webcache. The Device View Information area is displayed on the right side of the browser and contains the device mimic and the Device Summary table.

  • Page 63: Device Summary

    Click Contacts to display contact information from the 3Com Web site in a new browser window. Click Home Page to display the Home page of the 3Com Web site in a new browser window. Click Library to display the Online Library of the 3Com Web site in a new browser window.

  • Page 64: The Navigation Tree

    4: M HAPTER ANAGING THE The Navigation Tree The Navigation Tree is always displayed on the left side of the browser window. It is a Windows icons which allow you to manage your Webcache. By default, when you open the Web interface, the Summary View is selected and the Navigation Tree is fully collapsed with only the top-level options displayed.

  • Page 65: The Information Area

    Symbol Behavior Click the symbol to update the Information Area with the latest summary information for the Stack and the units within it. This symbol is only available in the Summary View. Click the symbol to perform an operation by opening a new window. Click the symbol to open a wizard in a new window.
  • Page 66 4: M HAPTER ANAGING THE EBCACHE...

  • Page 67: System Time

    Management -> Time Configuration in the Navigation Tree to access the wizard. You can configure the system time in either of the following ways: 3Com recommends that you use the Network Time Protocol to configure the system time of the Webcache. YSTEM...

  • Page 68: What Is The Network Time Protocol

    3Com recommends that if your network has an internal NTP server, you should use this rather than a public stratum server. If not, you should use...

  • Page 69: Configuring The System Time Using The Network Time Protocol

    Configuring the To configure the system time of the Webcache using the Network Time System Time Using Protocol, you must enter the following information in the Getting Started the Network Time wizard or Time Configuration command in the Web interface: Protocol 1 Select a timezone from the options in the Timezone drop-down list.
  • Page 70 5: S HAPTER YSTEM A Warning window appears asking if you want to continue with the system time change. Click Yes to continue and reset the Performance Graphs, or No to cancel the change.

  • Page 71: Security

    “Logging in as a Default User” on page 58. CAUTION: To prevent unauthorized access and configuration of the Webcache, 3Com recommends that you set a password for the admin username as soon as possible. Setting Passwords To set the password using the Web interface, you need to login as the admin user and select Security ->...

  • Page 72: What Is Password Recovery

    6: S HAPTER ECURITY You must enter the following information in both the Getting Started wizard and the Password Configuration screen: 1 Choose between the following options by clicking the appropriate radio button: 2 Either: Passwords can be up to 10 characters long, are case-sensitive and must only contain alpha-numeric characters.

  • Page 73: Performing Password Recovery

    Webcache and reinserting it. 3Com recommends that you access the CLI in this instance by connecting a standard null-modem cable to the console port on the Webcache. This enables you to be physically close enough to the Webcache to reboot the Webcache before password recovery mode resets.
  • Page 74 6: S HAPTER ECURITY...

  • Page 75: Controlling And Monitoring Web Access

    This chapter contains information about controlling the access of the users of your network through the Webcache to the Internet. It covers the following topics: What is Web Site Web Site Blocking allows you to control which Web sites can be accessed Blocking? through the Webcache.

  • Page 76: Configuring Web Site Blocking

    7: C HAPTER ONTROLLING AND Configuring Web To configure Web Site Blocking using the Web interface: Site Blocking 1 Log in to the Web interface. 2 Click Device View on the Toolbar. 3 Select System -> Caching -> Web Site Blocking in the Navigation Tree. 4 Check Enable Web Site Blocking.

  • Page 77: What Is Web Client Blocking

    to this website has been denied. If you do not agree with this site being blocked, please contact extension 1234”. To customize the response using the Web interface: 1 Click Device View on the Toolbar. 2 Select System -> Caching -> Customize Response in the Navigation Tree.

  • Page 78: Configuring Web Client Blocking

    7: C HAPTER ONTROLLING AND Configuring Web To configure Web Client Blocking using the Web interface: Client Blocking 1 Log in to the Web interface. 2 Click Device View on the Toolbar. 3 Select System -> Caching -> Client Machine Blocking in the Navigation Tree.

  • Page 79: What Is Access Logging

    preventing you from using the Web interface.You can regain access by either: CAUTION: If you are using Browser Auto-Configuration Files to configure your client machine Web browser settings, and you are using Web Client Blocking to control access to the Internet, you should ensure that Go Direct if no Webcache Available is not checked in the Browser Auto-Configuration screen.

  • Page 80: Configuring Access Logging

    7: C HAPTER ONTROLLING AND Field Action/Code Size Method Ident Hierarchy/From These fields are not applicable to the Webcache. Content Configuring Access To configure Access Logging using the Web interface: Logging 1 Log in to the Web interface. 2 Click Device View on the Toolbar. 3 Select System ->...

  • Page 81: Viewing The Access Log

    can change the password by clicking Change Password and entering the new password. 10 If you want to test and upload the Access Log now, click FTP Now. Enter a filename for the log and click OK. The filename can only contain alphanumeric and .
  • Page 82 7: C HAPTER ONTROLLING AND ONITORING CCESS 3Com recommends that you use Webtrends Log Analyzer to analyze the access logs that the Webcache produces: http://www.webtrends.com...

  • Page 83: System Events

    The emails are generated internally within the Webcache in a fixed format that is also used by 3com Network Supervisor. The emails can be sent to as many accounts as you like.
  • Page 84 “webcache@3com.com”. The partial address “webcache” would be rejected by the server. 3Com recommends that you use the domain name of the Webcache as the email address. If you have entered “webcache” as the host name and “mycompany.com”...

  • Page 85: Snmp Traps

    System Failure is also indicated by a yellow Power/Self Test/System Fault LED on the front panel of the Webcache; for more information, see the “Introducing the Webcache” chapter on page 17. 9 Click OK. SNMP Traps You can configure the Webcache to automatically generate Simple Network Management Protocol (SNMP) traps when certain significant system events occur.

  • Page 86: Configuring Snmp Traps

    Line Interface; for more information, see “Setting the Webcache SNMP Community String” on page 124. Description A cache storage device within the Webcache has failed. You have to return the unit to 3Com. The Webcache can no longer function as a cache due to hardware failure.

  • Page 87: Performance

    The System Performance and I/O Performance graphs show more detailed information which is intended for use by your System Administrator and 3Com support personnel. Performance monitoring is always enabled; you cannot turn it off. Caching...
  • Page 88 9: P HAPTER ERFORMANCE 3 Select Caching Performance Graphs from the available graph types. Select one of the three available time periods, Daily, Weekly, or Monthly, by clicking the appropriate radio button. 4 Click OK. The Caching Performance graphs show the following information, which is updated every 5 minutes: ONITORING Bandwidth Saving (%)

  • Page 89: System Performance Graphs

    The I/O (Input/Output) Performance graphs show more detailed Graphs information about the performance of the Webcache. They are intended for use by your System Administrator and 3Com support personnel. Hit and Miss Latencies (msec) The average time per request that the Webcache takes to respond to client machine HTTP requests.
  • Page 90 9: P HAPTER ERFORMANCE To view the I/O Performance graphs: 1 Log in to the Web interface. 2 Select Performance -> Graphs in the Navigation Tree. 3 Select I/O Performance Graphs from the available graph types. Select one of the three available time periods, Daily, Weekly, or Monthly, by clicking the appropriate radio button.

  • Page 91: System Diagnostics

    This chapter contains information about troubleshooting the configuration and network connectivity of the Webcache 1000/3000. It covers the following topics: What are System You can use the various system diagnostic capabilities of the Webcache to Diagnostics? help you identify any problems that may occur. Pinging Other The PING feature allows you to send out a PING request to test whether Devices...

  • Page 92: Tracing Ip Addresses

    10: S HAPTER YSTEM IAGNOSTICS 4 In the IP Address field, enter the IP address of the device that you want to PING. Click Ping. 5 The Webcache sends a single PING request to the specified device and a message similar to the following is displayed: Starting ping, resolution of displayed time is 10 milli-seconds If the device is accessible and functioning correctly, a message similar to...

  • Page 93: System Log

    4 You can choose to save the contents of the System Log onto a single management station in your network that has syslog analysis tools. This is of particular benefit if you are working with 3Com support personnel. Enter the IP address of the syslog server in the Enter Syslog Server IP Address field to enable this feature.

  • Page 94: What Is A Syslog Server

    10: S HAPTER YSTEM IAGNOSTICS should only enable it if you have been instructed to do so by 3Com support personnel. What is a Syslog Syslog is a standard protocol for reporting system events that occur on Server? the Webcache and most other modern network devices. A syslog server allows you to capture these system events, store them and display them in a variety of formats.

  • Page 95: Viewing The System Log

    System Log screen is displayed. The last 256 lines of the System Log are displayed. Click Refresh to update the information that is displayed. The System Log is primarily intended to be used by your System Administrator and 3Com support personnel to troubleshoot the Webcache. System Log...
  • Page 96 10: S HAPTER YSTEM IAGNOSTICS...

  • Page 97: Software Upgrade And Installation

    You can upgrade the management software of the Webcache when a Upgrade? new version becomes available. 3Com recommends that you always upgrade to the latest software version to take advantage of additional functionality, bug fixes and features. You can configure the Webcache to automatically detect and download new software versions, and notify you of their availability (via email notification;...

  • Page 98: Software Upgrade Snmp Traps

    OFTWARE The configuration of the Webcache is preserved after a software upgrade has been performed; you do not have to re-configure the settings. 3Com recommends that you configure the Webcache to automatically detect new software versions. Software Upgrade An SNMP Trap is sent to your network management station when any of...

  • Page 99: Performing A Software Upgrade

    You may want to change the FTP site in order to download a software upgrade from a location other than the default 3Com FTP site. You can restore the FTP site to the factory defaults by clicking Restore Defaults.
  • Page 100 HAPTER OFTWARE PGRADE AND 3Com recommends that you save your system configuration settings once the Webcache is configured and deployed within your network. Saving the configuration settings ensures that you can recover your entire system configuration if you ever need to re-install an older software version.
  • Page 101 If you selected Upgrade Later, the Finish screen is displayed. Click Finish to exit the Upgrade Software wizard. If you selected Discard Upgrade, the Finish screen is displayed. Click Finish to exit the Upgrade Software wizard. 6 Carefully read the summary information, which displays the name of the software image file, its software version and the date on which it was created.

  • Page 102: What Is A Software Installation

    Webcache. A software installation should only be performed as an emergency recovery procedure. 3Com recommends that you always run the latest software version on the Webcache. CAUTION: Unlike a software upgrade, all of the Webcache’s configuration settings are lost after a software installation has been completed;...

  • Page 103: Saving And Restoring Configurations

    3 Select System -> Control -> Install Software in the Navigation Tree. The first screen of the Software Installation wizard is displayed. Click Next. 4 In the Webcache Software Image field, enter the network path and filename of the software image file that you want to install. You can click Browse to search for the location of a software image file.
  • Page 104 To do this, you need to install the software image of the previous software version. This is available either on the CD supplied with the Webcache or on the 3Com FTP site. The same software image is used for installation and for upgrades.

  • Page 105: Saving A Configuration

    earlier software version via a software installation, you can use a matching configuration file to restore the settings. Saving a To save the current system configuration of the Webcache using the Web Configuration interface: 1 Log in to the Web interface. 2 Click Device View on the Toolbar.
  • Page 106 11: S HAPTER OFTWARE PGRADE AND CAUTION: You cannot restore a system configuration file which was created on a different software version to the version that the Webcache is currently running. 5 Click Restore. The restore process begins. 6 The Restore Configuration Successful screen appears. Click OK to reboot the Webcache and complete the restoration of the system configuration file.
  • Page 107 OMMAND NTERFACE Chapter 12 Command Line Interface...

  • Page 109: Command

    The Webcache 1000/3000 has a Command Line Interface that allows you to manage certain features from a terminal. You may want to use the Command Line Interface to setup the Webcache for management through the console port or over your network via Telnet. This chapter describes how to access and use the Command Line Interface.

  • Page 110: Accessing The Command Line Interface Through The Console Port

    12: C HAPTER OMMAND Accessing the To manage the Webcache using the Command Line Interface through the Command Line console port: Interface Through the Console Port 1 Connect the terminal or terminal emulator to the console port. To connect the cable: a Attach the female connector on the cable to the male connector on b Tighten the retaining screws on the cable to prevent it from being c Connect the other end of the cable to your terminal, terminal...

  • Page 111: Accessing The Command Line Interface Over The Network

    2 At the Login and Password prompts, enter your user name and password. For further information, see “Logging in as a Default User” on page 58. To prevent unauthorized configuration of the Webcache, 3Com recommends that you change the default password as soon as possible.

  • Page 112: Understanding The Command Line Interface

    12: C HAPTER OMMAND Understanding the Once you log in to the Command Line Interface, the Top-level menu is Command Line displayed as shown below: Interface Figure 20 The Top-level Menu The Command Line Interface is made up of two areas: From the Top-level menu, you can access these sub-menus: NTERFACE The Menu Area —...

  • Page 113: Entering Commands

    Entering Commands The command area of the Command Line Interface contains a Select menu option prompt that allows you to enter the commands in the menu area. Commands are not case-sensitive. Displaying Menus There are several ways to display the menus in the Command Line Interface menu structure: Understanding the Command Line Interface System menu...

  • Page 114: Obtaining Help

    12: C HAPTER OMMAND Obtaining Help You can access the Command Line Interface help system at any time by entering A Quick Guide to Table 12 describes the commands that are available in the Command Line the Commands Interface. Table 12 Command line interface commands Command gettingStarted logout...

  • Page 115: Getting Started

    Getting Started The Getting Started command allows you to quickly configure or view basic setup information for the Webcache. To configure basic setup information: 1 At the Top-level menu, enter: gettingStarted The following prompt is displayed: Enter system name: 2 Enter a system name for the Webcache. The name can be up to 80 characters long.
  • Page 116 12: C HAPTER OMMAND 9 Enter a valid domain name. The following prompt is displayed: Enter DNS Server IP address [0.0.0.0]: 10 Enter a valid Domain Network System (DNS) Server IP address. The following prompt and a list of timezones is displayed: Enter the index of timezone (1-30)[14]: 11 Enter the index number of the timezone that you want the Webcache to operate in.

  • Page 117: Exiting The Command Line Interface

    The following prompt is displayed: Retype password: 16 Re-enter the new password. A message is displayed informing you that the password has been successfully changed. The following prompt is displayed: Please enter mode of operation (proxy, transparent) [proxy]: 17 Enter either For further information, see “Deploying the Webcache in Your Network”...

  • Page 118: Specifying Basic Ip Configuration

    12: C HAPTER OMMAND Specifying Basic IP You can use the Configuration IP stack of the Webcache. This will allow you to manage the Webcache over IP via the CLI or Web interface. This command allows you to configure the IP address, subnet mask and the default router IP address. To configure basic IP management: 1 At the Top-level menu, enter: protocol ip basicConfig...

  • Page 119: Resetting Ip Information To Factory Default Settings

    The following prompt is displayed: Enter DNS Server IP address [196.168.100.3]: 4 Enter a valid Domain Name System (DNS) Server IP address. Resetting IP You can reset all IP information on the Webcache to factory default Information to settings using the Factory Default To reset IP information to factory defaults: Settings...

  • Page 120: Displaying Ip Summary Information

    12: C HAPTER OMMAND 64 bytes from 192.156.136.22: icmp_seq=0 ttl=248 time=195.2 If the device is not accessible, or is not functioning correctly, a message similar to the following is displayed: No answer from 192.156.136.22 Displaying IP You can display IP summary information for the Webcache using the Summary summary Information...

  • Page 121: Displaying And Changing Security Information

    If the device is accessible and functioning correctly, a message similar to the following is displayed which displays the network hops: 1.routerc1 (140.204.20.20) 1.292ms, 1.343ms, 1.810ms 2.BW-RTR-4.EUR.3Com.COM (161.71.21.45) 26.027ms, 27.156ms, 44.902ms 3.BW-RTR-1.EUR.3Com.COM (140.204.220.15) 24.323ms, 24.854ms, 30.096ms 4.janeway (161.71.123.36) 27.303ms, 33.639ms...

  • Page 122: Enabling And Disabling Password Recovery

    CAUTION: 3Com recommends that you leave Password Recovery enabled. If you disable it and subsequently forget the password for the admin user name, you will have to return the Webcache to 3Com. To enable or disable password recovery: 1 At the Top-level menu, enter:...

  • Page 123: Rebooting The Webcache

    2 Enter initialization. What Happens During an Initialization? Initializing the Webcache returns it to its default (factory) settings; for more information see “Default Settings” on page 22. You may want to initialize the Webcache if it has previously been used in a different part of your network, and its settings are incorrect for the new environment.

  • Page 124: Specifying Location Details

    12: C HAPTER OMMAND To specify the contact name details: 1 At the Top-level menu, enter: system management contact The following prompt is displayed: Enter system contact [<contact name>]: 2 Enter a system contact for the Webcache. The name can be up to 80 characters long.

  • Page 125: Displaying Summary Information

    To display the information: 1 At the Top-level menu, enter: system summary The administration details are displayed as shown in the example below: 3Com SuperStack 3 System Name Location Contact Time Since Reset...

  • Page 126: Software Version

    12: C HAPTER OMMAND NTERFACE Contact Displays the details of a person to contact about the Webcache. For information about assigning new contact details, see “Specifying a Contact Name” on page 123. Time Since Reset Displays the time that has elapsed since the Webcache was last reset, initialized or powered-up.

  • Page 127: Roblem Olving

    ROBLEM OLVING Chapter 13 Problem Solving...

  • Page 129: Accessing The Webcache Via The Console Line

    This chapter contains a list of known problems and suggested solutions. It covers the following topics: Accessing the The terminal or terminal emulator cannot access the Webcache. Webcache via the Check that: Console Line If the login sequence still does not display, reset the Webcache. For more information, see “Rebooting the Webcache”...

  • Page 130: Accessing The Webcache Via Telnet

    13: P HAPTER ROBLEM OLVING The terminal or terminal emulator can no longer access the Webcache over the network. Check that the connections and network cabling for the LAN port are in place. If there is still a problem, try accessing the Webcache through a different port.
  • Page 131 For the browser to operate the Web interface correctly JavaScript Cascading Style Sheets must be enabled on your browser. These features are enabled on a browser by default. You will only need to enable them if you have changed your browser settings. You cannot access the Web interface.
  • Page 132 13: P HAPTER ROBLEM OLVING problem, click in the part of the Web interface that has not displayed and repeat the above. Some of the text is not displayed in the Web interface windows. You must ensure that the Display Font Size for your System is set to Small .

  • Page 133: Solving Command Line Interface Problems

    Alternatively, the Webcache system time can be set manually. If you have configured the system time manually and it is inaccurate, the Webcache clock has probably drifted over time. 3Com recommends that you use the Network Time Protocol to prevent this. If this is not possible, reset the system time manually using the Time Configuration window.

  • Page 134: Solving Webcache Performance Problems

    Whether any of the cache storage devices have failed. Examine the front panel LEDs to ensure there are no faults found. If there are, contact 3Com support personnel. As long as there is at least one working cache storage device, the Webcache will operate as a cache, but the failure of a cache storage device will degrade the performance of the Webcache.
  • Page 135 Solving Webcache Performance Problems Local domain sites cannot be accessed using the Webcache as a proxy This is caused by an incorrect setting of the DNS domain name on the Webcache. Check the DNS configuration of the Webcache.
  • Page 136 13: P HAPTER ROBLEM OLVING...

  • Page 137: Ppendices And Index

    PPENDICES AND Appendix A Safety Information Appendix B Cable Specifications and Pin-outs Appendix C Technical Specifications Appendix D Technical Support Glossary Index NDEX...

  • Page 139: Safety Information

    AFETY NFORMATION You must read the following safety information before carrying out any installation or removal of components, or any maintenance procedures on the Webcache 1000/3000. WARNING: Warnings contain directions that you must follow for your personal safety. Follow all directions carefully. You must read the following safety information carefully before you install or remove the unit.

  • Page 140: Important Safety Information

    A: S PPENDIX AFETY NFORMATION Important Safety Information Europe USA and Canada Denmark Switzerland Installation and removal of the unit must be carried out by qualified personnel only. The unit must be earthed (grounded). The unit must be connected to an earthed (grounded) outlet to comply with European safety standards and EMC standards.
  • Page 141 France and Peru only This unit cannot be powered from IT† supplies. If your supplies are of IT type, this unit must be powered by 230V (2P+T) via an isolation transformer ratio 1:1, with the secondary connection point labelled Neutral, connected directly to earth (ground). †Impédance à...

  • Page 142: Consignes Importantes De Sécurité

    A: S PPENDIX AFETY NFORMATION Consignes importantes de sécurité Royaume-Uni Europe Etats-Unis et Canada Danemark Suisse L'installation et la dépose de ce groupe doivent être confiés à un personnel qualifié. Vous devez mettre l’appareil à la terre (à la masse) ce groupe. Vous devez raccorder ce groupe à...
  • Page 143 que si l'équipement auquel il est raccordé fonctionne dans les mêmes conditions. Le coupleur d'appareil (le connecteur du groupe et non pas la prise murale) doit respecter une configuration qui permet un branchement sur une entrée d'appareil EN60320/CEI 320. France et Pérou uniquement: Ce groupe ne peut pas être alimenté par un dispositif à...

  • Page 144: Wichtige Sicherheitsinformationen

    A: S PPENDIX AFETY NFORMATION Wichtige Sicherheitsinformat ionen Vereinigtes Königreich: Europa USA und Kanada Dänemark Die Schweiz Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal erfolgen. Das Gerät muß geerdet sein. Das Gerät muß an eine geerdete Steckdose angeschlossen werden, die europäischen Sicherheitsvorschriften und den Vorschriften zur EMV entspricht.
  • Page 145 Bezeichnung Neutral tragen. †Impédance à la terre. WARNHINWEIS: RJ-45-Porte. Diese Porte sind geschützte Datensteckdosen. Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für die Verbindung der Einheit mit einem traditionellem privatem oder öffentlichem Telefonnetzwerk gebraucht werden. Nur RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese Steckdosen anschließen.
  • Page 146 A: S PPENDIX AFETY NFORMATION...

  • Page 147: Pecifications And Pin - Outs

    Cable Specifications The Webcache supports the following cable types: 3Com recommends that you use Category 5 cable — the maximum segment length for this type of cable is 100 m (328 ft). ABLE PECIFICATIONS AND OUTS Category 3 One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586 standard.

  • Page 148: Pin-Outs

    B: C PPENDIX ABLE PECIFICATIONS AND Pin-outs Null-Modem Cable 9-pin to RS-232 25-pin Webcache 1000/3000 Cable connector: 9-pin female PC-AT Serial Cable 9-pin to 9-pin Webcache 1000/3000 Cable connector: 9-pin female OUTS Screen Shell Ground Screen Shell Ground PC/Terminal Cable connector: 25-pin male/female Screen only required if screen always required...

  • Page 149: Modem Cable

    Modem Cable 9-pin to RS-232 25-pin Webcache 1000/3000 Cable connector: 9-pin female Screen Ground RJ-45 Pin Pin assignments are identical for 10BASE-T and 100BASE-TX RJ-45 Assignments connectors. Table 13 Pin Assignments Pin Number Ports configured as MDI Ports configured as MDIX RS-232 Modem Port Cable connector: 25-pin male Shell...
  • Page 150 B: C PPENDIX ABLE PECIFICATIONS AND OUTS...

  • Page 151: Specifications

    –10 ° to +70 °C (14 ° to 158 °F) 10–95% relative humidity, non-condensing EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). UL 1950, EN60950, CSA 22.2 No. 950, IEC 60950, NOM-019 SCFI,...

  • Page 152: Technical Specifications

    C: T PPENDIX ECHNICAL PECIFICATIONS Standards Supported SNMP: SNMP protocol (RFC 1517) MIB-II (RFC 1213) Interface MIB (RFC 1573) Remote Monitoring MIB (RFC 1757) Terminal Emulation: Telnet (RFC 854) Protocols Used for Administration: UDP (RFC 768) IP (RFC 791) ICMP (RFC 792) TCP (RFC 793) ARP (RFC 826) TFTP (RFC 783)

  • Page 153: Technical Support

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

  • Page 154: 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 155 Here is a list of worldwide technical telephone support numbers. These numbers are correct at the time of publication. Refer to the 3Com Web site for updated information. Country Telephone Number Asia, Pacific Rim Australia 1 800 678 515 Hong Kong...

  • Page 156: Returning Products For Repair

    D: T PPENDIX ECHNICAL Returning Products Before you send a product directly to 3Com for repair, you must first for Repair obtain an authorization number. Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’s expense.
  • Page 157 Country U.S.A. and Canada Telephone Number 1 800 NET 3Com (1 800 638 3266) Enterprise Customers: 1 800 876 3266 Returning Products for Repair Fax Number 1 408 326 7120 (not toll-free)
  • Page 158 D: T PPENDIX ECHNICAL UPPORT...

  • Page 159: Auto-Negotiation

    LOSSARY 3Com Network The 3Com umbrella management system used to manage all of 3Com’s Supervisor networking solutions. 10BASE-T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE-TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable.

  • Page 160: Full-Duplex

    LOSSARY Domain Name System. This system maps a numerical Internet Protocol (IP) address to a more meaningful and easy-to-remember name. When you need to access another device on your network, you enter the name of the device, instead of its IP address. Ethernet A LAN specification developed jointly by Xerox, Intel and Digital Equipment Corporation.
  • Page 161 with periods (full-stops), and is made up of a network section, an optional subnet section and a host section. Local Area Network. A network of client machines (such as PCs, printers, servers) and network devices (hubs and switches) that cover a relatively small geographic area (usually not larger than a floor or building).
  • Page 162 LOSSARY proxy cache The Webcache is connected to a Layer 2 switch in your LAN. The Web browser on each client machine in your network must be configured to explicitly direct its Web requests to the Webcache. router A router is a device on your network which is used to forward IP packets to a remote destination.
  • Page 163 LOSSARY VLAN Virtual LAN. A group of location- and topology-independent devices that communicate as if they are on the same physical LAN. Wide Area Network. A communications network that covers a wide area. A WAN can cover a large geographic area, and may contain several LANs within it.
  • Page 164 LOSSARY...
  • Page 165 NDEX Numbers 10BASE-T/100BASE-TX port 21 3Com Knowledgebase Web Services 153 3Com Network Supervisor 18, 83 3Com URL 153 access levels of default users 58 Access Logging 79 analyzing the logs 81 configuring 80 squid format 79 viewing 81 accessing the Web interface 39, 58...
  • Page 166 NDEX saving 103, 105 connecting to the live network 44 console port 20, 41 hotspot 62 contact command 123 controlling Web access 75 conventions notice icons, About This Guide 12 text, About This Guide 12 Coordinated Universal Time 68 cross-over cable 38 customizing the response 76 default IP address 38, 40...
  • Page 167 link speed 22 port activity 22 WAN port 21 location command 124 log, system 93 configuring 93 viewing 95 logging access 79 analyzing the logs 81 configuring 80 viewing 81 logging in password 71 user name 71 logging in as a default user 58 logout command 117 management Command Line Interface 109...
  • Page 168 67 configuring 67 manual 69 Network Time Protocol 69 technical specifications 151 technical support 3Com Knowledgebase Web Services 153 3Com URL 153 network suppliers 154 product repair 156 test network 38, 40 third-party tools 54 time configuration 67...
  • Page 169 trace route 92 traceroute command 120 tracking access 79 analyzing the logs 81 configuring 80 viewing 81 transparent cache 33, 34 transparent mode 21 troubleshooting 91 Unit hotspot 62 upgrading software 97 configuring 98 performing 99 SNMP Traps 98 unsuccessful 98 URL 153 user guide 26 user name, admin 71...
  • Page 170 NDEX...
  • Page 171 TRADE SECRETS; TITLE: You acknowledge and agree that the structure, sequence and organization of the Software are the valuable trade secrets of 3Com and its suppliers. You agree to hold such trade secrets in confidence. You further acknowledge and agree that ownership of, and title to, the Software and all subsequent copies thereof regardless of the form or media are held by 3Com and its suppliers.
  • Page 172 GNU General Public Licence. These items of software are used unmodified. The source code for the version of Linux used is available on the 3Com FTP site at ftp.3com.com Copyright (C) 1989, 1991 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA.
  • Page 173 medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee.
  • Page 174 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein.You are not responsible for enforcing compliance by third parties to this License.
  • Page 175 <one line to give the program's name and a brief idea of what it does.> Copyright (C) 19yy <name of author> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation;...
  • Page 176 EGULATORY OTICES FCC S TATEMENT NFORMATION CSA S TATEMENT CE S TATEMENT UROPE VCCI S TATEMENT BSMI S TATEMENT 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.

This manual is also suitable for:

Superstack 3c16116Superstack 3 webcache 10003c16115-us - superstack 3 webcache 10003c16116-us - superstack 3 webcache 3000Superstack 3 webcache 3000

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