Surely all your machines can communicate quite happily using IPv6 link-local addresses? Why this fascination with Legacy IP?
Because none of my facilities (including my desktops) are set up to use IPv6. More to the point -- I have an emotional prejudice against IPv6 -- I am NOT looking forward to the day when my refrigerator has its own IPv6 address, and reports to third parties how much beer I have downed.
mikus