Or as Bullwinkle said:
"No doubt about it, I gotta get another hat!"
For my money, the solution is IPv6 with 8+8 addresses, so the
routing goop can be changed without impacting the transport
machinery. this will allow essentially transparent "renumbering"
if done right.
And rule (13):
"Often the easiest way to resolve a problem is to simply
agree not to have it."
-mo