nanog mailing list archives
Re: anyone running GPS clocks in Southeastern Georgia?
From: "Robert E. Seastrom" <rs () seastrom com>
Date: Fri, 21 Jan 2011 17:37:46 -0500
Gary Buhrmaster <gary.buhrmaster () gmail com> writes:
NTP isn't going to be the only "ripple".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. Gary (*) This presumes that this test results in loss of signal lock, and not intentionally injected false information.
Seeing the ripples also presumes that people are monitoring their NTP system health more closely than just looking at the output of ntpq -p. :) -r
Current thread:
- RE: anyone running GPS clocks in Southeastern Georgia?, (continued)
- RE: anyone running GPS clocks in Southeastern Georgia? Matlock, Kenneth L (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Robert E. Seastrom (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Peter Beckman (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Gary E. Miller (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Owen DeLong (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Brandon Ross (Jan 22)
- Re: anyone running GPS clocks in Southeastern Georgia? Gary Buhrmaster (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Cutler James R (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Robert E. Seastrom (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Owen DeLong (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Jay Ashworth (Jan 23)
- Re: anyone running GPS clocks in Southeastern Georgia? Cutler James R (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Robert E. Seastrom (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? James Brown (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Anton Kapela (Jan 23)
- Re: anyone running GPS clocks in Southeastern Georgia? Joel Jaeggli (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Robert E. Seastrom (Jan 21)
- Re: anyone running GPS clocks in Southeastern Georgia? Peter Lothberg (Jan 22)