3Com 3CRWDR200B-75, 3CRWDR200A-75, WL-553 manual Alert LED, Recovering from, Further advice

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106CHAPTER 6: TROUBLESHOOTING

Alert LED	The Alert LED will flash when the Router unit is first powered up while
	the system software checks the hardware for proper operation. Once the
	Router has started normal operation, the Alert LED will go out.
	■ If the Alert LED does not go out following start up, but illuminates
	continuously, this indicates that the software has detected a possible
	fault with the hardware. Remove power from the Router, wait 10
	seconds and then re-apply power. If the Alert LED comes on
	continuously again, then a fault has been detected. Locate the copy of
	the Router software on the accompanying CD-ROM or 3Com web site
	(http://www.3com.com) and upload it to the Router to see if this
	clears the fault (refer to “Recovering from Corrupted Software”
	below). If this does not fix the problem, contact your supplier for
	further advice.
	■ During normal operation, you may notice the Alert LED lighting briefly
	from time to time. This indicates that the Router has detected a hacker
	attack from the Internet and has prevented it from harming your
	network. You need take no specific action on this, unless you decide
	that these attacks are happening frequently in which case you may
	wish to discuss this with your ISP. The Router logs such attacks, and
	this information is available through the Status and Logs screens.

Recovering from	If the Alert LED remains permanently on following power-up, it is possible
Corrupted Software that the system software has become corrupted. In this condition, the
	Router will enter a “recovery” state; DHCP is disabled, and the LAN IP
	address is set to 192.168.1.1. Follow the instructions below to upload a
	new copy of the system software to a Router unit in this state.

Ensure that one of your computers has a copy of the new software image file stored on its hard disk or available on CD-ROM.

The latest software is available on 3Com’s Web site at:

http://www.3com.com

1 Remove power from the Router and disconnect all your computers, except for the one computer with the software image.

2 You will need to reconfigure this computer with the following static IP address information:

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Contents OfficeConnect 3Com Corporation Campus Drive Marlborough, MA USA Contents Running the Setup Wizard WAN Using Discovery END User Software License Agreement Page About this Guide ConventionsConfigure your Router Text ConventionsIntroducing the Router Example Network Without a Firewall Router Firewall Router AdvantagesFront Panel Minimum System Component RequirementsOperations Power LED Green Rear Panel SocketPower Adapter OK LED Introducing the Router Introduction Safety InformationPositioning the Router Feet Using the RubberWall Mounting Stacking the RouterIP Address Subnet Mask Default Router address DNS address Page Connecting the Router Hardware Installation Address Details on how to obtain an IP address automaticallyObtaining an IP AutomaticallyRestart your computer Local Area Properties ScreenObtaining an IP Address Automatically Software Disabling PPPoEPptp Client MacintoshProxy Disabling WebUse Proxy Server option is unchecked Setting UP Your Computers Accessing WizardCountry Selection Screen Welcome Welcome Screen Wizard Screen Password Change Administration Password Screen Click Next to display the Time Zone setup screen WAN Settings Internet Settings Screen PPPoE Mode PPPoE ScreenPPPoA Mode PPPoA ScreenDynamic/Fixed IP in 1483 Bridge Mode Dynamic/Fixed IP in Bridge ModeIP over ATM ModeIPoA IP over ATM ScreenBridging Mode Bridging Mode ScreenDhcp Server Setup Screen Accessing the Wizard Summary Configuration Summary Screen Through the Router ConfigurationNavigating PagesGetting Help Changing the Administration Password LAN Settings menu provides the following options LAN SettingsFor information on how to run the wizard Unit ConfigurationLAN Settings Static Dhcp Dhcp Lease Table Dhcp Lease Table Screen Country Domain Enable Wireless NetworkingWireless Mode Please select your country from the drop-down listService Area Name/SSID Enable Broadcast SsidProfile Support for NICs To enable WEP, select WEP from the Encryption Type WEPType Click Save to save the settingTo enable WPA, select WPA-PSKor WPA2-PSKfrom the Encryption WPA with RadiusEnter the Radius Server IP address Enter the Radius Port numberTxop Transmission Opportunity WMM Wireless Multimedia Edca AP ParamentersEdca STA Parameters Connection Control Screen Client List Client List ScreenAdvanced Wireless Settings Screen Wireless Settings Router Configuration PPPoA PPP over ATM WDS ScreenPPPoE FirewallIPoA IP over ATM Virtual Server Virtual Servers ScreenSpecial Applications Special Applications Screen Single DMZ Click Apply to save the configuration and apply the changesMultiple DMZ SPI Screen PC Privileges PC Privileges Screen Router Configuration Schedule Rules Screen Make sure the Enable Content Filter check box is checked Content Filter ScreenTo enable the URL Filtering, please do the following URL Filter ScreenItems Restart, Time Zone, Configuration, and Upgrade System ToolsRestart Restart Screen Time Zone Time Zone Screen Restore Configuration Data Backup ConfigurationReset to Factory Default Upgrade Upgrade Screen Service, ProxyARP, Port Mapping, and IPSec AdvancedSetting Up RIP RIP screenTZO.com Ddns screenQuality of Service QoS Screen NOIP.comProxy ARP Screen IPSec Screen Port Mapping Screen Management Check Enable System Log box Snmp Screen Check UPnP Enabled to activate UPnP UPnP ScreenDisable Remote Administration This option is set as default Remote Management ScreenDiagnostics Diagnostics Screen Device InfoSummary The Summary Screen Statistics The Statistics Screen ARP screen is used to display the ARP status Support Support Screen Feedback Feedback Screen Router Configuration Basic Connection Browsing to the Router Configuration ScreensChecks Reset to Connecting toForgotten Password Factory DefaultsWireless NetworkingTroubleshooting Power Adapter OK Power LED orLED Not Lit Seconds and then re-apply power. If the Alert LED comes on Recovering fromFault with the hardware. Remove power from the Router, wait Further adviceFrequently Asked Questions How do I reset the Router to Factory Defaults?3Com Warranty and Support Services Http//knowledgebase.3com.com3Com Warranty and Support Services Troubleshooting Discovery Windows Installation 95/98/2000/Me/NT/ XPRunning ApplicationDiscovered Router Screen Internet protocol suite consists of a well-defined set Protocol SuiteManaging the Router over the Network TCP working together. TCP/IP is an internationally adoptedType One Type TwoHow does a Device Obtain an IP Address and Subnet Mask? Appendix B IP Addressing Interfaces Adsl Wireless 11g 108Mbps Firewall RouterWlan Interfaces Dimensions Operating TemperaturePower WeightSystem Requirements Operating Systems Maximum cable length of 100m 327.86 ftAppendix C Technical Specifications Safety Information Important Safety InformationWichtige Sicherheitshinweise Consignes importantes de sécurité Appendix D Safety Information Agreement Appendix E END User Software License Agreement Glossary Chapter Glossary Ethernet Address See MAC address Hub RouterHalf Duplex IP AddressCard NIC MAC AddressNetwork ProtocolChapter Glossary Traffic The movement of data packets on a network Area Index Index Regulatory Including interference that may cause undesired operation Ycanada IC Installed outdoors is subject to licensing That the Industry Canada technical specifications were metPower Eirp is not more than that required for successful Même si ce brouillage est susceptible de compromettre le141 142 Page USA

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