Does anyknow know of any good books or good URLs that go in depth on some advanced spanning tree topics. Most books explain STP really well and how it works, but most dont have very many scenarios and complex/unusual scenarios. Whereas Routing TCP/IP Vol 1,11 have excellent scenarios on basic and complex routing such as redistribution of 3 routing protocols on one router, although unlikely in the real world, it still helps understand the detailed operation of redistribution and some advanced features.
I havent taken the CCIE yet, however, I'm sure the STP section on the lab or written wont be simple. I could easily see Cisco have PVST, MST, and CST all converge into one topology, have some links be trunked between them, and others just be access ports with certain vlans.