That didn't seem to help on the MacBook - however I've seen disabling IPv6 on some Vista machine help so I was hopeful ;) I disabled LEAP and used PEAP instead but I found I still had to do the 'ipconfig set en1 BOOTP' and 'ipconfig set en1 DHCP' commands to make the interface get a new...
Same problem....The Airport card was getting a valid address for our guest network but when the MacBook is configured for one of our secure wireless networks it wouldn't release the old IP address and therefore wouldn't work.
DHCP release/renew does not seem to have any affect. So...
