[119907] in North American Network Operators' Group
Historical traceroute logging
daemon@ATHENA.MIT.EDU (Justin Shore)
Thu Dec 3 15:42:06 2009
Date: Thu, 03 Dec 2009 14:40:30 -0600
From: Justin Shore <justin@justinshore.com>
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Does anyone know of any tools that can do repeated traceroutes over time
to a remote IP and log the results for later viewing/comparison? I'd
like to do a traceroute several times a day and store the details in CVS
or somewhere accessible down the road. Alerting to major path changes
would be nice but not critical. The ability to compare traceroute
output down the road would also be nice but also not critical. I'm more
interested in the path than the individual hops' RTTs.
What's prompting this is a major change in RTTs for several hours
yesterday to an ITSP with a site in the south. We share a common
upstream (L3) and have in the past always transited that provider to get
to each other. I showed a route change for the specific /23 in question
in my border routers' RIBs. The adjacent /23 originating from the same
ITSP but in a different part of the country did not change (and neither
did RTTs to the hosts we monitor in that /23). The site claimed nothing
changed on their end and that they know of no changes upstream. BGP
Play shows a route change from Level3 to Internap during the time in
question (thought the times don't line up exactly) which most likely
caused the more than double RTTs we were seeing. My Cacti Advanced Ping
graphs caught the problem in all its glory. Nagios alerted me to the
high RTT times as well. What I didn't get during that period of time
was a traceroute to the site in question.
I'd like to run a traceroute several times a day and find some way to
store the output and work with it later if needed. I'd prefer OSS but
commercial apps would be considered too. I'm sure I'm not the first to
have a need to check traceroutes like that. How do the rest of you
handle it?
Thanks
Justin
