[52808] in North American Network Operators' Group
Re: question concerning traceroute?
daemon@ATHENA.MIT.EDU (Martin)
Thu Oct 17 10:46:13 2002
From: Martin <marty@supine.com>
Date: Fri, 18 Oct 2002 00:43:04 +1000
To: nanog@merit.edu
In-Reply-To: <000e01c275e9$d7a5c3f0$c701a8c0@sarcasta>
Errors-To: owner-nanog-outgoing@merit.edu
$author = "Darrell Carley" ;
>
> 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?
a traceroute shows the outbound route. it's possible for the the probe
packets to follow one path and the returning icmp packets to take another
path. a looking glass in the AS your tracing to is a good way to see what
the return path is...
marty
--
Close your brown eyes,
And lay down next to me.
Close your eyes, lay down.
'Cos there goes the fear,
Let it go.
"There Goes the Fear" - Doves
