for the DHCP Snooping to work, the DHCP server has to support Option-82.
As per my knowledge the DHCP Server on Windows Server 2003 doesent support it.
If a server supports Option-82 it will also send out the Option-82 information in the ACK packet it sends to the DHCP client. You can run a Ethereal on the DHCP server machine and check wether the DHCP Request packets and ACK packets are carrying the Option-82 information or not?
I was facing a similar situation with DHCP snooping. In my case the clients were getting the IP address. However the binding table was not forming. The Windows DHCP Server was not sending back the Option-82 info to the client. We found there were other people facing similar problem with the Windows Server. We tried the Turbo DHCP Server. We saw that this server was sending the Opt-82 information back. Likewise the binding table was now being formed on my switch .
Plz let me know how it is working in your case without Opt-82?
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