Then one must ask, why are so many people finding it necessary to
become multi-homed? A lot of it is kind of a vicious wheel.
Because "NSP A" had routeing problems "customer X" had to backup
their link to "NSP B". I personally think most of its down to a lack
of education to the customers.
Will people please stop asking this question, it seems to put a jinx
on the net. Everytime it gets asked, some major provider kills their
network for a day, giving the answer to the question.