Originally Posted By: peter

If the client were Linux, I'd suggest setting up an IP alias of the interface, which would be guaranteed to get a new address, then downing the non-aliased version -- but I've no idea whether Windows has those same features.

That isn't going to fly on Windows, you can have the equivalent of aliases, but only one DHCP setup per interface and the rest static IPs.

Thinking about it, can it really work the way on Linux you claim it does ? The DHCP server only has the MAC address to identify the interface by, so surely adding DHCP'd alias is just going to get you the same IP address that has already been allocated to the interface by the server ?
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