MAJOR Strange DHCP Issue Please HELP!

[Aholmes]

Our LAN has been running fine for the last year.All of the sudden our DHCP clients are not picking up DHCP leases.

We have 4 subnets. Each SUB has a DHCP server (windows 2000) . Most of our clients are Windows 2000 PRO.

When a client boots up the "preparing network connections" hangs for a while. Once it gets to the logon screen you can log in to the local machine.

The IPCONFIG /ALL reveals a 0.0.0.0 IP setting.
If I add a Static IP and then reboot the machine boots up fine. I can remove the static and then go DHCP and the machine will get a lease just fine.

the behavior is consitent with all the clients. I have replaced switches... dished out security fixes and rebuilt one of our four DHCP servers . Nothing is working....

on top of this i ran Sniffer PRO and had a very hi-rate of DROPPED packets.. not sure what that means either.

two of our 4 subnets are having identical problems.

thanks for your help!

 

[eightball]

On the afflicted Subnets is the dhcp server actually on the subnet? Is it a DHCP server that is configured to handle all the subnets from one server? Do uou have routers with helper addresses?

 

[GlenJohnson]

On the servers, is there anything in the event logs? What has changed that you can think of since the network has been stable so long. It sounds like the dhcp service is running, but I can't figure out that ip address. Have you disabled the function of getting auto ip's on the clients when they can't find dhcp server?

Glen A. Johnson
"Fall seven times, stand up eight."
Proverb

Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884

 

[spi200]

Hi

Sounds like the scope has been deactivated in DHCP, check it to see it is not been altered or check the Server log files to see what is causing the scope problems.

Regards

David