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Question : TCP/IP is not responding to pings, DHCP is not working
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I am operating a small wireless network using a Linksys 801.11b wireless router, an IBM ThinkPad X30 w/built-in wireless adapter, and a Toshiba satellite with a WPC54G card. The IBM rocks and rolls on the network. Connection with the access point is solid and Internet access is solid as well. The Toshiba will not pick up an IP address despite what I know to be correct network settings. Even modifying the TCP/IP properties and assigning a static IP address, mask, and DNS server info does not resolve the problem. The Toshiba, once reconfigured for static IP, can not ping the ThinkPad or the Linksys gateway. The ThinkPad can not ping the Toshiba. When running IPCONFIG from the command prompt, it appears that an auto-configuration address is in place on the Ethernet port, and this IP address shows up on the wireless port when the static IP information is removed.
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Answer : TCP/IP is not responding to pings, DHCP is not working
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first make sure its not a TCP/IP problem
Repair TCP/IP and Winsock errors
Use this piece of software to reset your TCP and Winsock settings.
http://ntcanuck.com/Beta/useful_programs/WinsockFix.exe
You can determine if you have a Winsock problem by doing the following.
Put in the windows XP CD and navigate to the support >Tools folder.
Double click setup and select full install.
Click Start >run >cmd {enter}
Type netdiag /test:winsock /v {enter}
To reset the Winsock registry entries
Click Start >Run >regedit {enter}
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Winsock and delete it
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Winsock2 and delete it
Exit Regedit and reboot.
To install TCP/IP over itself (to do this you need a copy of nettcpip.inf there IS one on the Windows XP CD and MAY be one on your hard drive)
Right click "My Network Places" select Properties.
Right click the connection and select Properties.
Click Install >Protocol >add >have disk
Browse to the location of nettcpip.inf (see above)
Select TCP/IP click OK
Reboot
*****Also See*****
LSP-Fix
http://www.cexx.org/lspfix.htm
Windows 98, 98SE, or Windows Me
http://www.bu.edu/pcsc/internetaccess/winsock2fix.html
Windows 95/98/98SE/ME
http://digital-solutions.co.uk/lavasoft/whndnfix.zip
Then address the wireless problem
Cant connect to a Wireless AP (Access Point) or Router
First open My Network Places (or network neighborhood if your 9X or ME) for XP users this will be on the start menu or desktop.
Click View Network Connections, you should see your wireless network card, right click it and select properties. Select the Wireless Networks tab, and press the configure button.
In the SSID box type the SSID for the device you are trying to connect to (they are CaSe SenSiTiVe)
You should now be able to connect if not do the following, try each step one by one and test connection after each one.
1. First make sure this isnt the problem
Wi-Fi Protected Access (WPA) Patch (Q815485) Can Cause Connection Loss
http://www.intel.com/support/network/wireless/pro2100/sb/cs-006131-prd944.htm
2. Click start >Run >services.msc {enter} locate the Wireless Zero Configuration Service, right click it select Stop. Right click it again select properties and change its startup type to disabled.
3. Go back to My network places and bring back the properties of the wireless network card (as described above) on the Wireless Networks Tab click Advanced > Power Management > un-tick the default tick box and move the slider all the way up.
4. If non of these has worked, then I would suggest getting out the CD that came with the Wireless card and looking for a setup utility on the CD. If you have cordless phones in the house unplug them.
5. If your still drawing a blank, then Id suggest borrowing a laptop with Wireless to see if it can see your AP/Router and to see if anyone else has one running near you that is interfering with your signal, http://www.netstumbler.com/ is a good utility to see what's broadcasting around you BUT it will not detect networks that have a hidden (not broadcasted SSID) you need something expensive like http://www.airmagnet.com/ for that. Remember wireless runs over numbered channels if you pick up another network within TWO channels of yours it will interfere.
If your locked onto another network see
http://www.experts-exchange.com/Hardware/Notebooks_Wireless/Q_21019342.html#11300009
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