Introduction to Spanning-Tree | Network Fundamentals Part 25

Are frames immortal? You might be surprised. If a layer-2 loop exists in your network, you might find that your frames loop indefinitely.

Is this a problem? Yes! As frames loop around your network, they consume resources. Add in more hosts and more frames, and you can grind your network to a halt.

This is what we call a broadcast storm.

So what can we do? The good news is that this problem was solved way back in 1985, when spanning-tree was developed.

Spanning-Tree Protocol (STP) detects loops, and then selects a link in the loop to disable. This breaks the loop, so we no longer have a problem.

In the next video, we’ll see exactly how this works.


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