How to force Windows 7 to ask for a "fresh" IP address from DHCP server?

Posted by haimg on Super User See other posts from Super User or by haimg
Published on 2012-09-05T23:51:34Z Indexed on 2014/06/13 9:32 UTC
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Windows

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networking

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dhcp

I'm troubleshooting a certain issue with my DHCP configuration, and need my Windows machine to ask for a "fresh" IP address, so I can see which address DHCP server gives by default.

When I do ipconfig /release followed by ipconfig /renew, Windows "proposes" its old IP address to the DHCP server (just checked with Wireshark, initial "DHCP Discover" message has Option-50 (requested IP address) with Windows machine's old IP).

Tried disabling/enabling network adapter. Same behavior.

Question: How can I force Windows to just ask for a new IP address, without proposing its old IP address.

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