I'm not satisfied with the weak anti-spoofing protections of TRILL, but I don't see this making things worse.

I have what I hope is a naive question: since this proposes to label level 1 areas by the set of RBs that connect them to the level 2, expanding on Section 6 (One Border RBridge Connects Multiple Areas), what happens when the set of RBs connecting to multiple areas is the same, such that all of those areas would then get the same name, under this scheme?   (I'm hoping this works, and I'm just not sorting out the details, but I'm making sure...)