Loop Avoidance

Loop Avoidance
Finally, the layer 2 switch is responsible for
loop avoidance
. Now obviously, it’s a good idea to
use redundant links between switches, because they help stop complete network failures if one
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Chapter 15 
Layer 2 Switching and the Spanning Tree Protocol (STP)
link fails. Redundant links are extremely helpful, but they can cause more problems than they
solve. The more redundancy built into a network, the more loops will occur, causing loops
within loops and exacerbating any problems caused. In this section, we’ll discuss some of the
most serious problems:

Broadcast storms

Multiple frame copies

MAC table instability