That was the first thing I tried and I get an error saying that the DHCP server is not available for that interface. So for some reason it's won't forget the address or where it got it from. Simon <div class="gmail_quote"> On 15 February 2011 10:07, John Stevenson <<a href="mailto:john@jr0cket.com">john@jr0cket.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div><div></div><div class="h5"><div class="gmail_quote">On 15 February 2011 09:55, Simon Swaysland <<a href="mailto:simon.swaysland@gmail.com" target="_blank">simon.swaysland@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hi, I'm having an issue with a DHCP server I've just set up on a new box running running Maverick. I was running DHCP on a Cisco 877, but decided to play with DHCP on my home server instead. My wife's laptop (windows7) is still requesting it's old IP address, 192.168.0.27, it connects to the interweb and works without an issue, but it isn't requesting a new IP address. I get this in syslog: Feb 14 15:13:21 BigDell dhcpd: DHCPREQUEST for 192.168.0.27 from 78:e4:00:69:01:b6 via eth0: unknown lease 192.168.0.27. Any idea of how to make it forget the old IP address and request a new one? Cheers, Simon </blockquote></div> </div></div>Hello Simon, To get a windows machine to change its assigned DCHP IP address, try the following commands in a terminal window (Dos box) on your Windows machine: ipconfig \release ipconfig \renew It has been a while since I used Windows, to I may have got the slashes the wrong way round. If the about does not work, try ipconfig /release ipconfig /renew Thank you -- John Stevenson Lean Agile Consultant / Coach <a href="http://jr0cket.com" target="_blank">jr0cket.com</a> | <a href="http://leanagilemachine.com" target="_blank">leanagilemachine.com</a> -- <a href="mailto:ubuntu-uk@lists.ubuntu.com">ubuntu-uk@lists.ubuntu.com</a> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk</a> <a href="https://wiki.ubuntu.com/UKTeam/" target="_blank">https://wiki.ubuntu.com/UKTeam/</a> </blockquote></div> -- SENTIO ALIQUOS TOGATOS CONTRA ME CONSPIRARE.