Service Provider, Troubleshooting


OK, I know this is a little rudimentary, but… it seems to come up a lot.  Simply put, traceroutes that result in the last hop showing low latency and no packet loss, have no latency or packet loss along the way, regardless of what the traceroute shows.  I’ve seen a lot of escalations trying to troubleshoot why the 3rd router in a 10 hop traceroute is not responding, or has a high ping, but the end to end is low and consistent.  Below is a little powerpoint I put together, to help illustrate how traceroute works, in the interest of getting people to stop chasing wild geese.  I hope it helps you explain this relatively straight forward concept:



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