Dhcp authorization windows 2008

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Students Click Here. Hi I am having a nightmare trying to get dhcp working in a new windows server. It has stopped servicing clients. The following are some possible reasons for this: This machine is part of a directory service enterprise and is not authorized in the same domain.

This machine cannot reach its directory service enterprise and it has encountered another DHCP service on the network belonging to a directory service enterprise on which the local machine is not authorized. Some unexpected network error occurred.

A silly question, did you restore AD onto a DC? I just have a feeling that restore AD straight onto the server here is going to be the problem. That is what is really bothering me. Hi, Ace Many thanks for the comprehensive response. DHCP scope options: Router : I know this because the remainder of the clients had access to the Internet which is via the default gateway address When the Vista and Windows 7 clients had the alternate configuration applied they, too, were able to access the Internet via the default gateway address This is what is so baffling.

Something must have occurred that prevented the Vista and Win 7 clients from successfully pinging the gateway, despite the fact that the gateway was accessible the entire time.

One has to wonder if the gateway address was correct. I've no reason to assume it wasn't because we have just the one gateway: We use a Draytek Vigor router for the gateway and there is an option to block ping requests from the Internet which I have enabled, but ping requests from the local network are always acknowledged.

There must be something here that I'm missing or am not aware of. I'd also be interested in looking at how a DHCP server authenticates itself against the domain - how often this occurs, the steps involved etc. I've not found anything yet, so if you have any info on that I'd be really grateful if you could share it.

Thanks a lot for responding - it really got me thinking about this and I learned some new stuff. The people over at Netwrix have kindly responded to my query and I am satisfied that this software is not responsible for the DHCP hiccup. Ace: Thank you very much for the help.

If it does, that would explain why it was unable to successfully ping the gateway as our firewall explicitly allows local traffic from We recently purchased an additional server for remote access so that the DC would no longer be multi-homed. I will set up DHCP on that additional server. That's a good question. I would need to research that to see if my assumption on the algorithm applies. Yea, I would definitely look at DHCP failover instead of the overhead you're implying dealing with it on the client side!

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