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Cisco Routers: Routing Loops

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A number of years ago, I had bought several server and networking instructional video DVDs (Trainsignal, CBT Nugget, LearnKey) to stay sharp on those topics, but no matter which videos I viewed, I always had one complaint. None of the videos demonstrated concepts from a visual viewpoint. For example, if a video was explaining how spanning-tree would use BPDUs to prevent routing loops, the instructor would pull up a terminal window and show BPDUs being send and received by Cisco switches, and leave it up to the viewer to imagine what was happening. They might even display a few diagrams to give a general idea of what the networking topology looks like, but I still wanted more. Since I am a more visually orientated person, I would prefer to see an animation of switches connect to each other and BPDU packets interacting between the switches.

I created these series of free videos for people like me who want to visualize what is happening, and not just simply hear a description of the process. Most people have to create network lab scenarios because the process is not clear to them. I have done my best using Cisco Packet Tracer and PowerPoint Animation to give my viewers a better understanding of how server and networking systems work at the visual level. I hope you will enjoy this and please let me know about any future instructional videos you would like me to create.

Philip Brown
Dallas, TX

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