They expect the network to be like the phone or power outlets; you just plug in where you happen to be. If we expect renumbering and provider-based addressing to be feasible, it seems to me that w/s vendors need to provide powerful tools to enable *transparent* *on-the-fly* renumbering - else it won't happen. And even if they do (and where's the carrot for *them*?), it will be quite a while before such tools are ubiquitous enough to make the process always easy. Should we be working with vendors in this area? I'm told that numerous host vendors are working on developing DHCP. Of course, this does not fix legacy systems, but it does mean that renumbering may get easier than it is today. The carrot for them is that it makes it easier to renumber. ;-) This makes life easier for the network manager, who has to deal with Sally and George moving their department to the third floor problems. Tony