Originally Posted by SplitInfinity

Host A does not own his own IP's OR has IP's that are lent to him by a carrier, but are not routed with his own BGP. Should the provider he borrowed his ip's from drop off the face of the earth, EVERY SINGLE customer of his has to move to new ip's change DNS, reprogram systems dependant on IP's and etc. A very costly risk. Ask me, I have been through that before!!!

Now, on the contrary, host B owns his own IP's, Runs his own BGP sessions with multiple providers, has his own entries in RADb routing arbriter databases and generally does things the right way. Should one of his pipes
go Enron on him (die/bankrupt/otherwise dead) then he has NO downtime.
No one has to move DNS, renumber or otherwise have downtime.
In this scenario.... even if a car crashed into the meet me room in his colo or self owned datacenter... all he needs to do is pick up the servers, move them to another physical location without the crashed car of course, and turn the servers back on.. All that has to be done on Host B's part is to assure the ip netrange is announced on the internet at the new location...

Portability, thats the key to this thread. Amen.