The Problem-Solving Model
9
Reproduce the Problem
Before spending time and effort trying to solve this problem, verify that it is
still a problem. Troubleshooting is a waste of time and resources if the
problem can't be reproduced. It's just like a dog chasing his tail.
Understand the Timeline
In addition to verifying whether the problem is reproducible, it is important
to investigate the frequency of the problem. For instance, maybe it happens
only once or twice a day. By establishing a timeframe you can more readily
identify any possible causes.
F I G U R E 1 . 4
Host A can't FTP to Host Z
Campus A
Frame
relay
cloud
Campus B
FDDI
ring
Host B
Host C
Host D
Host F
Host G
Host E
Host H
Host J
Host K
Host I
Host L
Host X
Host Y
Host W
Host Z
Host A
VLAN 1
VLAN 1
VLAN 3
VLAN 2
1. No FTP between
Host A and Host Z
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