Root Cause Analysis

The final of the three steps, root cause analysis, strives to finish the troubleshooting process to identify the specific device and function that needs to be fixed. The root cause is a problem in the network, that once it is fixed, solves at least part of the original problem.

Finding the root cause is vitally important because the root cause can be fixed. For example, continuing the same problem with R2 not being able to forward packets to PC2, consider the list of problems identified through problem isolation:

Image R2 cannot forward packets to PC2.

R2 gets no ARP Reply from PC2.

SW4’s interface for the trunk to SW5 is in a ...

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