[99318] in North American Network Operators' Group
Re: Question on Loosely Synchronized Router Clocks
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Mon Sep 17 18:09:37 2007
To: Kevin Oberman <oberman@es.net>
Cc: Xin Liu <smilerliu@gmail.com>, nanog@merit.edu
In-Reply-To: Your message of "Mon, 17 Sep 2007 14:28:45 PDT."
<20070917212845.2D01245027@ptavv.es.net>
From: Valdis.Kletnieks@vt.edu
Date: Mon, 17 Sep 2007 18:02:21 -0400
Errors-To: owner-nanog@merit.edu
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On Mon, 17 Sep 2007 14:28:45 PDT, Kevin Oberman said:
> I had a router that lost it's NTP servers and was off by about 20
> minutes. The only obvious problem was the timestamps in syslog. (That's
> what alarmed to cause us to notice and fix it.)
Trying to correlate logfiles with more than a several-second offset is
good and sufficient reason in itself to make sure everything is NTP-synched.
Of course, if your network runs so well that you never *notice* the offsets
because you never have to correlate logfiles, you're probably either a better
net admin than I, or merely more oblivious.. ;)
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