How Well Do You Understand Spanning Tree Protocol? Part 2 - Unmanaged Switch Loop + Managed Switch

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United States Robert Mayer
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Published on ● Video Link: https://www.youtube.com/watch?v=l5C-IykWMWw


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What happens when you create a L2 loop on an unmanaged switch that is connected to a managed switch with spanning tree configured? I'll give you a hint... Even if a port is "blocking", it still processes frames such as - STP, CDP, LLDP, VTP, PAgP, LACP, UDLD, etc.

So, if you create a loop that keeps feeding that managed switch with control plane frames, it could be the end!

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Tags:
networking
rmtech
rmtechcentral.com
spanning tree
portfast
spanning-tree portfast
switchport host
bpdu
switch loop
broadcast storm
layer 2 loop
l2 loop
network loop
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