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So in conclusion, your decision to trust and use data from ICMP based troubleshooting should be based on your relative understanding of the transit path. You should never take a traceroute that has high latency on it and say its a network issue just because hope 7 has latency greater then 250ms. This is no different the a doctor telling you your spleen is the result of your headaches without factual basis.
If you do not have clear factual data when diagnosing a problem and you blame the network because of a traceroute, you may very well be completely missing the root cause of the problem. Think of it as getting tunneled vision when sh!t hits the fan and management is expecting answers and the first thing you notice is high latency on a traceroute. With out completely understanding traceroute you may be fixating on an issue that is really not an issue at all.
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Dice che senza conoscere dettagliatamente le reti e l'hardware su sui passano i traceroute, non puoi decidere che esiste un problema solo perché un numerino è più alto di un altro. Si fa una diagnosi errata.