> Maybe I read your paper on project SNIPE too quickly, but it was not > immediately clear that the problems you mentioned were a specific > result of an attempt to make the application resilient against > (sudden) changes in IP address. that wasn't quite the purpose of SNIPE. SNIPE didn't really anticipate that the network would change IP addresses out from under it, but rather that processes (and thus their IP addresses) would need to be accessible from multiple addresses (in order to be able to use the most efficient network medium available), and to be able to migrate from one address to another (in order that the system as a whole could continue to operate for long periods of time without interruption). still, the mechanisms we built for SNIPE (and then discarded) were very similar to what people are now proposing as a way to cope with changes in IP address, and our experience with SNIPE seems like a good indicator of how well those mechanisms could be expected to work.