On this stream I did something different. I started forgetting my networking skills since I transitioned to software development full-time. NetworkChuck created a troubleshooting lab in Packet Tracer and I thought it would be great to see what I still remember from my networking knowledge.
I think the lab is great and I had a lot of fun troubleshooting it. Thanks to NetworkChuck for creating it!
My only problem is that Packet Tracer is a simulator and is not running real IOS and does not behave like one. Some commands are missing, some behavior is weird and incorrect. It greatly affects your troubleshooting, because you are never sure that the output you are observing is because of the configuration problem or a simulator "feature".
On 2:38:28 packet tracer crashed and I had to start from the beginning (at least I had notes!) which was very frustrating. Anyway, I think I got to the bottom of majority of misconfigurations and had a great time doing it.

Try the lab on your own: https://bit.ly/brokennetwork
NetworkChuck's video of breaking the lab: https://www.youtube.com/watch?v=DTW0eu5eLEo
Keith Barker's video of troubleshooting this lab: https://www.youtube.com/watch?v=hU7koTD1RnA