DHCP not working

[TheMikeh]

Hey,

Basically we have a small business network consisting of 6x servers, 30 client machines and 5 managed POE switch's. We then have an endian os firewall on a server which manages routing etc. Now DHCP has and always was enabled on our primary domain controller and worked fine, however all our machines are static IP'd except the laptops.

For the past week the laptops have been failing to get a valid IP address and just shows as being on an 'unidentified network'. Now Ive got a program called DHCP Find and when run on the laptop it shows a packet being recieved stating the correct DHCP server and a valid IP address but it doesn;'t seem to go any further.

Ive checked that the DHCP scope is correct, with the correct DNS, WINS and ROUTER values on the scope, ive even tried a fixed lease using one of the laptops MAC address's and still nothing.

Does anyone have any ideas? all the laptops are Win Vista SP1 machines, the DHCP is on our primary domain controller which is 32bit Win 2003. I have even tried disabling the DHCP on the domain controller and turning on the DHCP on the firewall and it still does the same.

Any ideas? help!

Thanks
Mike

 

[TheMikeh]

DNS has never been running on our PDC as endian has support for AD enviroments. Just for your information Ive finally fixed the problem! Turns out there was a Mac Timecapsule which was trying to issue IP's via DHCP due to the user plugging the cable into one of its ethernet ports not its wan port!! Unplugged it and the DHCP magically started working.

Thanks for the help.

 

[TechyMcSe2k]

Thanks for the Update!

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[NetworkTek]

Good Deal! Thanks for the update on it

Network+ Inet+ MCP