Date: Tue, 09 Oct 2018 08:06:21 -0600 From: Ian Lepore <ian@freebsd.org> To: Wojciech Puchar <wojtek@puchar.net>, Peter Jeremy <peter@rulingia.com> Cc: freebsd-hackers@freebsd.org Subject: Re: ntpd strange problem Message-ID: <1539093981.72469.30.camel@freebsd.org> In-Reply-To: <alpine.BSF.2.20.1810090841430.41943@puchar.net> References: <alpine.BSF.2.20.1810041557330.94038@puchar.net> <20181005061829.GG21091@server.rulingia.com> <alpine.BSF.2.20.1810051122310.9032@puchar.net> <a31ca466-3ef6-8a66-10cc-1c24cd6dc928@FreeBSD.org> <alpine.BSF.2.20.1810062041490.7470@puchar.net> <1538855151.14264.54.camel@freebsd.org> <alpine.BSF.2.20.1810081315510.26846@puchar.net> <20181009052924.GJ21091@server.rulingia.com> <alpine.BSF.2.20.1810090841430.41943@puchar.net>
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On Tue, 2018-10-09 at 08:42 +0200, Wojciech Puchar wrote: > > > > > > > > Strange but today (4 days after i restarted ntpd) it seems to be > > > in sync > > A couple of suggestions: > > * (especially if you have an ADSL link): The NTP protocol assumes > > that > > the path between the client and server are have symmetric > > timing. In > i have gigabit connectivity with low and stable delays. so it's not > this. > > > > > my experience, bulk uploads or downloads can cause significant path > > delay asymmetries, which can confuse ntpd. > > * You only have a single server and are therefore dependent on the > > trustworthiness of that server. A few more servers could be > > useful. > this server is quite (actually excellently) stable and i trust it. When I asked for various outputs, I meant "when the unsync problem is happening"; those outputs are uninteresting when everything is working right. You should remove the config for the "local" clock from your ntp.conf. Configuring a bogus local clock is NEVER the right thing to do, and it's even worse to configure it at a high stratum number. -- Ian
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