Reddit mentions of The All-New Switch Book: The Complete Guide to LAN Switching Technology

I've provided two citations in this thread. Mind sharing the document you're talking about?

edit: one more, section 2.1.1

If the port on which the frame is received is the same port where the target destination resides,
the bridge can simply discard the frame because it can be assumed that the target will have
received the frame through the normal LAN delivery mechanisms.

edit 2: If you still have doubts, take a look at the 2 switch topology I supplied elsewhere in this thread. I think we can all agree that the lower switch will flood a C1 -> C2 frame to the upper switch after C2's link drops.

At this point, the lower switch will know to reach "C1" via C1's access port. The upper switch will know to reach C1 via the lower switch. Reachability to C1 is correct throughout the topology.

If the upper switch forwards the frame back toward the lower switch (because that's where C2 is) the lower switch CAM table will get corrupted: The lower switch will re-learn C1 via the upper switch. Obviously wrong.

You should probably start from the bottom up.. The best book I can recommend:

http://www.amazon.com/The-All-New-Switch-Book-Technology/dp/0470287152/ref=sr_1_14?ie=UTF8&qid=1344017473&sr=8-14&keywords=lan+switching