Possible explanations for a large hop in latency

Mikael Abrahamsson swmike at swm.pp.se
Fri Jun 27 01:50:52 CDT 2008


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 at swm.pp.se




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