You need to save your program and configurations first.
It may or may not get the same IP address if you have it set to DHCP. Write it down first because you may have to manually enter it in order to get the web pages running and restore your program.
It may not recognize your modules with the same numbers since it's a new base unit and they will be looking for the old one. If you have multiple EB8's, plug in the lowest numbered one first, then the next and so on. If you have other modules, plug them in in the same order as their module ID, one at a time. Hopefully they'll all come up numbered properly.
I just realized there's a lot of 'maybe' in there Larry!