[131440] in North American Network Operators' Group
RE: NTP Server
daemon@ATHENA.MIT.EDU (Brandon Kim)
Sun Oct 24 13:44:47 2010
From: Brandon Kim <brandon.kim@brandontek.com>
To: nanog group <nanog@nanog.org>
Date: Sun, 24 Oct 2010 13:41:06 -0400
In-Reply-To: <4CC466D6.5020701@2mbit.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Looks like you have a pretty good setup. What vendor equipment are you usin=
g? You can let me know offline so it doesn't
sound like you're advertising them....
> Date: Sun=2C 24 Oct 2010 11:03:18 -0600
> From: bruns@2mbit.com
> To: nanog@nanog.org
> Subject: Re: NTP Server
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> On 10/24/10 9:34 AM=2C Brandon Kim wrote:
> > I wanted to open up this question regarding NTP server. I recalled
> > someone had created a posting of this quite awhile back.
> >> From a service provider/ISP standpoint=2C does anyone think that
> >> having a local NTP server is really necessary?
> >
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> It may not be necessary=2C but it certainly is not a bad thing. Not=20
> having to depend on third parties for a service is a good thing.
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> > I've asked some of my fellow engineers at work and many of them gives
> > me the same response=2C "Can't we just use free ones out on the
> > internet?"
> >
> > 1) How necessary do you believe in local NTP servers? Do you really
> > need the logs to be perfectly accurate?
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> Perfectly accurate is very helpful when trying to associate several=20
> incidents going on at the same time or when trying to figure out the=20
> timeline leading up to why a machine had a kernel panic=2C for example.
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> > 2) If you do have a local NTP
> > server=2C is it only for local internal use=2C or do you provide this N=
TP
> > server to your clients as an added service?
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> Our master stratum 1 GPS clock only has ipv6 access to the outside=20
> world. Our two 'public' ntp servers can talk directly to it over ipv4=20
> or ipv6=2C and those are are publicly available via ipv4 or ipv6.
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> > 3) If you do have a local
> > NTP server=2C do you have a standby local NTP server or do you use the
> > internet as your standby server?
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> If the stratum 1 becomes unavailable (its 500 miles away on a different=20
> network)=2C the two public NTP servers are peered with one another=2C and=
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> both have a different outside third-party NTP server to sync with (may=20
> it be an upstream provider's ntp server=2C or one of the pool ones from=20
> ntp.org).
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> Never had a problem with this setup=2C and its worked rather well.
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> --=20
> Brielle Bruns
> The Summit Open Source Development Group
> http://www.sosdg.org / http://www.ahbl.org
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=
