[105543] in North American Network Operators' Group
RE: Possible explanations for a large hop in latency
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Fri Jun 27 02:51:02 2008
Date: Fri, 27 Jun 2008 08:50:52 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: nanog list <nanog@merit.edu>
In-Reply-To: <!&!AAAAAAAAAAAuAAAAAAAAAKTyXRN5/+lGvU59a+P7CFMBAN6gY+ZG84BMpVQcAbDh1IQAAAATbSgAABAAAABweIQu8cUwQ7b8kc3pwtiyAQAAAAA=@iname.com>
Errors-To: nanog-bounces@nanog.org
On Thu, 26 Jun 2008, Frank Bulk - iNAME wrote:
> Interestingly enough, when I trace from my Cisco router it seems to show
> some MPLS labels after the hop of interest (12.88.71.13 to 12.122.112.78,
> only 24 msec here!). I'm not sure how our Cisco box derives these from a
> foreign network.
The ICMP packet (TTL exceeded in transit) contains a copy of the packet
which TTL expired, including the labels, so label information is available
to traceroute.
--
Mikael Abrahamsson email: swmike@swm.pp.se
