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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: question concerning traceroute?
On Thu, Oct 17, 2002 at 10:31:12AM -0400, Darrell Carley <[email protected]> wrote: > I am trying to troubleshoot a latency issue for some of our networks, > and was wondering about this.Knowing that routing isn't always > symmetrical, is it possible for a traceroute to traverse a different > reverse path, than the path that it took to get there? .or will it > provide a trace of the path the packet took to reach the destination? > According to definition, is should take the same path, but are there any > other cases that I should be aware of? Something else to be aware of is the effect of ECMP on traceroutes--where the source/dest IP (among other hash inputs) can impact which of several parallel equal cost paths you take thru a backbone. ECMP is fairly common, so I would suspect a fairly large percentage of paths are subject to it. -Lane > > Darrell > > > > >
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