Clients lose default gateway

[frankcpl]

I am having an issue with a windows 2003 network. I have the server running DHCP and DNS. Everything worked great the first week. Then some clients (Windows XP SP 3) lose the default gateway. I ipconfig /all and everything is right except there is nothing in the default gateway. Does anyone know why this happens?

Any help is greatly appreciated.

 

[VinceWhirlwind]

1.Check your DHCP server's mscope details are correct.
2.Make sure somebody hasn't connected another DHCP to the LAN. Disconnect your existing DHCP server and do an IPconfig /release and /renew to see if there isn't another server running.

 

[frankcpl]

DHCP Server's MSCOPE? not for sure what you are talking about. Unless you are talking about the scope ipaddresses.

I have access points on the network, but no other DHCPs. I can release the ips and renew them, the only way I can get a default password to show up is by adding the route -p, it works for a day or two then it disappears again.

 

[VinceWhirlwind]

Yes, "scope" - not sure where that "m" came from....

So your scope is correctly configured? It's not the IP addresses I'm worried about - it's the "router" option (option 3).

It's about 3 years since I managed an organisation's DHCP server, but I seem to remember I could "stop" individual scopes when required - this would be a good way to see if there is another device handing out IP addresses on that subnet.

 

[frankcpl]

I will try that Monday, Thanks for the information.

 

[frankcpl]

Tried that and still no dice. I have finally figured out a little something. The guys before me set up the server to be DHCP and DNS by enabling internet sharing on one nic and not using the RRAS but when I try to enable that it doesn't allow anyone to connect. Is there any thing anyone can think that I might need to check?