Did you guys have any trouble with the solution to the STP exercise?  Let’s work through it and see what happens.  I got a few responses to the solution, and everyone seems to get the same answer, so I assume we’re all right.

Before we get started, I wanted to mention the tie breakers since there can be ties in STP.  If there is a tie in any calculation, the same tie breakers are used, so I’ll list them here to use as we move through the calculations.

Here’s an STP exercise for you.  Given the bridge priorities, MAC addresses, and interface types in the diagram, calculate the root bridge, root ports, designated ports, and blocked ports.  You can click on the image to enlarge it.  I’ll post a solution in the next few days.  As always, feel free to comment and ridicule my utter idiocy.  Be gentle, though; I don’t usually post exercises like this.

Send any configuration BPDUs questions my way.