while not exactly what you're looking for, this might be a good starting point: http://en.wikipedia.org/wiki/Virtual_Router_Redundancy_Protocol http://en.wikipe

while not exactly what you're looking for, this might be a good starting point: http://en.wikipedia.org/wiki/Virtual_Router_Redundancy_Protocol http://en.wikipedia.org/wiki/Virtual_Router_Redundancy_Proto... there seems to be some more reading material linked to at the bottom.