[135357] in North American Network Operators' Group
Re: anyone running GPS clocks in Southeastern Georgia?
daemon@ATHENA.MIT.EDU (Jay Ashworth)
Sun Jan 23 17:57:41 2011
Date: Sun, 23 Jan 2011 17:58:06 -0500 (EST)
From: Jay Ashworth <jra@baylink.com>
To: NANOG <nanog@nanog.org>
In-Reply-To: <AANLkTim=Rks3MH+ySoYHYKaauZkhgV1-xJ05wXLxi=wE@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
----- Original Message -----
> From: "Gary Buhrmaster" <gary.buhrmaster@gmail.com>
>
> Most of the "brand name" GPS NTP solutions have a clock
> with is more than stable enough to survive without GPS
> lock for 45 minutes(*). Some of the more expensive units with
> temperature controlled oscillators have hold times in the
> many weeks. My guess is that the NTP ripples will be
> limited to those NTP servers just (or recently) booted
> which have not yet achieved a stable clock state.
Do such clocks reduce their advertised stratum when doing so?
Or are they always considered "GPS-steered", and therefore there's no
meaningful change short-term?
-- jra
