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3Com Webcache 3000 (3C16116), Webcache 1000 (3C16115) manual Solving Webcache Performance Problems

Models: Webcache 3000 (3C16116) Webcache 1000 (3C16115)

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Solving Webcache Performance Problems 135

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.

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3Com Webcache 3000 (3C16116), Webcache 1000 (3C16115) manual Solving Webcache Performance Problems

Contents

SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents II Webcache Features System Time Performance Monitoring III Command Line Interface Problem Solving Returning Products for Repair Page About this Guide Conventions Icon DescriptionConvention Description Pddtechpubscomments@3com.com RelatedDocumentation Comments Product RegistrationSite Getting Started Page Reduced Web Latency What isWebcache? Reduced Network Traffic Supervisor Controlled Web AccessWebcache 3Com Network View Detail Color Indicates Cache Storage Status LEDsLink Status LEDs LED Color Indicates Activity LED Power/Self test LED LEDs Caching Mode Feature Webcache 1000/3000 Port SpeedDuplex Mode DNS Server Default Router NTP Network Time Protocol Disabled Introducing the Webcache Installing the Webcache Package Contents Choosing a SuitableSite Webcachemounts Rack-Mounting Kit Contents Fitting a Rack-Mounting Bracket to the Webcache Fitting a Rack-Mounting Rail to the Rear of the Rack Fitting a Rack-Mounting Rail to the Front of the Rack Repeat and for the other side of the rack Webcache Power-upPowering-up Sequence Color State Problem Proxy Cache Deploying Webcache in Your Network Transparent Cache Transparent Cache Deployment Key As a Proxy Forwarder below Setting Up the Webcache for Management Example Setting Up Using a Cross-over Cable Setting Up Over the Test Network Is the default IP address of the Webcache Accessing the Web Interface User name and password screen To connect to the Webcache via the console port Setting Up Through the Console Port Accessing the Command Line Interface Completing the Getting Started wizard before you introduce Wizard SettingsSetting Meaning Default Example Getting Started Cables ConnectingWebcache to Live Network Obtaining a Registered IP Address ConfigurationConcepts IP Addresses Installing the Webcache Host Name Domain Name You cannot enter a host name containing a space character Click LAN Settings Tick Use a proxy server ManualExplicitly direct its Web requests to the Webcache Select Manual Proxy Configuration Proxy AutoFile Scripts Http//intranet Select Automatic Proxy Configuration Click LAN Settings Tick Use automatic configuration script Web Proxy Auto-Discovery Wpad protocol is not supported by Without delays caused by WpadWeb Proxy Auto-Discovery Third-party Tools Web ProxyAuto-Discovery Resources Chapter System Events Performance Monitoring System DiagnosticsSoftware Upgrade and Installation Chapter Managing the Webcache System Time SecurityPage Software Interfaces Management Interface Default UserAdmin user name is case-sensitive Logging in as a Accessing the Web Interface Banner Understanding the The Web Interface Help View ToolbarSummary View Device View Unit Hotspot Device MimicConsole Port Hotspot LAN Port Hotspot Device Summary SymbolBehavior Area Information Managing the Webcache System Time Protocol Server Network TimeProtocol? Choosing a Manually ConfiguringProtocol System Time System Time Username as soon as possible Passwords?Setting Passwords What are Security of the Webcache. When password recovery is enabled Account no passwordAccess to the management interfaces Enabled on the Webcache Password Recovery Password for the admin usernamePerforming Security WEB Access Check Enable Web Site Blocking Site BlockingExample Domain Name Rules What is Web Client Blocking? Log in to the Web interface Click Device View on the Toolbar Client Blocking Bypass the Webcache entirely after reading the Browser See Proxy Auto Configuration PAC File Scripts onAccess log to the FTP server Access logs contain the following fields Field Description Logging Access Logs LogAnalyzing Controlling and Monitoring WEB Access Notification System Events Webcache has failed its Power On Self Test Check Enable Email Notifcation of System EventsNew software upgrade is available Software upgrade has succeeded Software upgrade has failed System events occur. An Snmp trap is a message generated by It. You can configure the network management station to logSnmp Traps Cache storage device has failed Click OK Traps Caching Monitoring? Bandwidth Saving % Hit and Miss Rate %Request Rate sec-1 CPU Load % SystemHit and Miss Latencies msec Throughput Kbits/sec DNS Lookups sec Disk Activity secNetwork Packets sec New TCP Connection sec Devices Diagnostics?What are System Pinging Other Route Tracing IPAddresses Performing a Trace System Log is primarily intended to be used by your System Administrator and 3Com support personnel to troubleshootSystem Log That worked are displayed Special.asp Log System Diagnostics Installation For more information about Snmp Traps, see Snmp Traps on Upgrades Performing an Automatically Detected Software Upgrade Performing a Software Upgrade Discard Upgrade View Upgrade Version Release NotesUpgrade Now Upgrade Later Performing a Manual Software Upgrade Performing a What is a SoftwareInstallation? Installation Restoring ConfigurationsConfigure the settings of the replacement Webcache Saving Example Web interface Matching configuration file to restore the settingsRestoring a Interface Click Restore. The restore process begins III Command Line Interface 108 Accessing Command Line Interface Command Line Console port Accessing Command Line Interface Security menu GettingStarted commandLogout command Protocol menu To enter abbreviated commands To enter a simple commandTo enter multiple commands To enter commands that require values Quick Guide to Commands Enter a valid subnet mask Following prompt is displayed Basic setup information for the WebcacheFollowing prompt is displayed Enter a valid IP address Following prompt is displayed Enter a valid time Enter the new password for the admin userEnter a valid domain name Following prompt is displayed Enter a valid date Following prompt is displayed Automatically log you out Command on the Top-level menuExiting Displaying Changing IP-related Information Specify an IP address to be traced Enter a valid gateway IP addressEnter a valid domain name Resetting IP Information to Factory Default Settings Enter yes to reset the IP address for the WebcacheEnter a valid Domain Name System DNS Server IP address To display the IP information, at the Top-level menu, enter Information Displaying Changing the AdminPassword No password Following example prompt is displayed Displaying Changing Webcache Information Functions What Happens During an Initialization? What Happens During a Reboot? Specifying a Management menuTo specify the name At the Top-level menu, enter System Name Enter a community string for the admin user nameTo set the community string At the Top-level menu, enter Following read-only fields are displayed Hardware Version Time Since ResetContact Software Version Problem Solving 128 Accessing the Webcache via the Console Line Solving Web Accessing the Webcache via TelnetInterface Problems You cannot access the Webcache using Telnet You cannot access the Web interface System Time does not update in the Web interface Solving Command ProblemsLine Interface PerformanceCheck Problems No Web sites can be accessed using the WebcacheSolving Webcache The performance of the Webcache is poor Solving Webcache Performance Problems Problem Solving Appendices and Index 138 Safety Information Personnel only Important SafetyPower Cord Set This must be approved for the country where it is used France and Peru only Only Calibre 18 AWG Type SV ou 5J Conducteurs Consignes importantes de sécuritéCordon électrique Il doit être agréé dans le pays dutilisation Consignes importantes de sécurité Wichtige Sicherheitsinformat ionen Das Gerät muß geerdet seinNetzstecker Bezeichnung Neutral tragen †Impédance à la terre Appendix a Safety Information Category PIN -OUTS PC-AT Serial Cable Pin-outsNull-Modem Cable Pin to RS-232 25-pin Modem Cable 9-pin to RS-232 25-pin Pin Number Signal Function Appendix B Cable Specifications and PIN-OUTS Environmental Requirements Physical DimensionsSafety Power Supply Protocols Used for Administration Standards SupportedTerminal Emulation Online Technical Services Hostname ftp.3com.com Europe and South Africa Asia, Pacific Rim Country Telephone Number Fax Number Returning Products for Repair Appendix D Technical Support Glossary Gateway EthernetFast Ethernet Full duplex Protocol LAN portLatency Line speed Glossary Glossary Glossary Index Index LAN Snmp Index Index 3COM END User Software License Agreement GNU General Public License Version 2, June Page No Warranty Page Regulatory Notices