My computer is on DSL behind a router that uses DHCP. The connection was dropped this morning and Mac OS X's DHCP did not log back and in and get the new information from the router. I had to change the Network preferences to BootP, close the panel, and then return and select DHCP again. OS X logged back in to the router.
Is there any way to make DHCP log back in automatically?
Mac OS X Hints
http://hints.macworld.com/article.php?story=20010328230804845