Just as with ISIS .. and most anything else. In order to continue operating when it's "ceiling" is reached, network design and vendor implementation must be tailored (optimized) to accommodate shortcomings in the specific application. I've seen one of these "theoretical" ceilings w/ISIS at a previous employer (one of the "big 5"). I guess you could say "allowing the glass to break wasn't an option". -danny

Perhaps I'm forgetting something... Doesn't OSPF have a "glass ceiling"..

Kind of like the current mboned issue's ?

Routes, * states, * interfaces | macs, * changes...... != scalable...

Perhaps I am wrong..... Anyone care to clarify ?

Or, should we limit our scope of the term "scalable"... In which case, OSPF is dynamite.