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DHCP not working

By semmelbroesel ·
I recently managed to update my old Win XP Laptop to SP2, and I had hoped it would solve this problem...

In my LAN, most computers have a static IP, but when I take my laptop to a hotel or a hotspot, DHCP often fails to get an IP address. I have to disable the network connection and re-enable it, and sometimes that works.

IPCONFIG /renew does not work either, it shows an error message which I don't remember, and I can't reproduce it right now because it seems my wireless setup on the same laptop died on me (it claims Wireless Zero Config service is not on, but it is, and there is no other program controlling my wireless anymore... oh well).

Are there any files that I can replace or (re-)register to get DHCP back working?

Thanks!

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by ctrservices In reply to DHCP not working

Disable WEP and MAC Address Filtering. Let us know the results.

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by animatech In reply to DHCP not working

Make sure that you enabled the laptop to get an automate IP addres and check the advance tab under networking > TCP\IP > and make sure it is DHCP enabled.
to enable dhcp or view you ip settings you can use the netsh.exe utillity

netsh interface ip set address "Local Area Connection" dhcp - Will enable the dhcp

Info link - http://www.petri.co.il/configure_tcp_ip_from_cmd.htm

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by CG IT In reply to DHCP not working

create a hardware profile for when your on the road. Here's a KB on it.

http://support.microsoft.com/default.aspx?scid=kb;en-us;308577

One profile for when your on the LAN and another profile when away.

another avenue is if you exclusively use Wireless away and your ethernet at home/work, create seperate connections. Disable the connection for "on the road" while at home/office. Then while on the road, disable the home/office connection and enable the on the road.

The above KB article for hardware profiles do this same thing only you choose which hardware profile to use when booting up, instead of enabling or disabling a network connection.

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by semmelbroesel In reply to DHCP not working

I should have given more details, sorry.
The DHCP problem occurs for both wireless and wired LAN, two seperate NICs. My guess is that somehow Windows networking components got shot, but I can't tell which ones. SFC didn't find anything wrong. Also no spyware or viruses on my PCs.

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