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Encore pire ….


Notes:

Calculate who is root bridge. You have 3 hours. Go.
Things to emphasize: Lots of redundancy here – lots of redundant links. Some lack of consistency. Yet still a terrible design.
This makes our key point: Resiliency is more than just adding redundant links. As a matter of fact, having lots of redundant links can actually hurt you, because it makes spanning tree and Dijkstra calculations more difficult – thus hurting your convergence time.
Fully-Messed environment