[rbridge] Draft problem statement

[Alper Yegin]

> Hopefully the endnodes aren't *that* mobile. It's not being
> designed for mobile ad-hoc networking, but for
> wired networks. So endnode movement won't be
> very frequent. We just want it to be plug-and-play when it
> does happen.

But it is so tempting to use this for mobile ad-hoc networks, localized
(or micro-) mobility management, etc :) And I think it is hard to
prevent that. We should eventually have some understanding on the
scalability characteristics, and maybe have some appropriate warning
signs...

Alper