How odd. Both clocks are stratum 1? Were the associated servers chiming off other servers as well?
Cheers, -- jra ----- Original Message ----- > From: "Mel Beckman" <m...@beckman.org> > To: "John Curran" <jcur...@arin.net>, "NANOG" <nanog@nanog.org> > Sent: Friday, May 10, 2024 4:29:13 PM > Subject: Re: NOAA Space Weather Prediction Center issued a Severe (G4) > Geomagnetic Storm Watch > We just had two TM1000 TimeMachine brand GPS NTP servers lose clock sync at > the > same time, in two different cities (LA and Santa Barbara). The outage lasted > about five minutes, during which the NTP servers were responding, but with > time > that was 1900 seconds out of sync. The devices showed satellite lock on 8 > birds > (not all the same ones). I've never seen this behavior before with years of > NTP > clock experience. > > It could be that these inexpensive NTP servers aren't very selective about > bogus > inputs, as I would have expected them to lose synch in the event of a GPS > signal failure. Instead they produced garbage. Our PRTG NTP monitor logged the > problem this way: > > > Sensor SNTP (SNTP) *** > Device 10.2.10.90-TimeMachine NTP server (10.2.10.90) > New Status at 5/10/2024 12:49:52 PM (Pacific Standard Time): > Down > Last Message: > The target server did not return a valid time. To resolve this issue, use a > packet analyzing tool and do a trace of the NTP packets to check if all fields > are correctly populated. (code: PE085) > > ________________________________ > From: NANOG <nanog-bounces+mel=beckman....@nanog.org> on behalf of John Curran > <jcur...@arin.net> > Sent: Friday, May 10, 2024 10:54 AM > To: NANOG <nanog@nanog.org> > Subject: NOAA Space Weather Prediction Center issued a Severe (G4) Geomagnetic > Storm Watch > > > <https://www.swpc.noaa.gov/news/swpc-issues-its-first-g4-watch-2005> > SWPC Issues Its First G4 Watch Since 2005 | NOAA / NWS Space Weather > Prediction > Center<https://www.swpc.noaa.gov/news/swpc-issues-its-first-g4-watch-2005> > swpc.noaa.gov<https://www.swpc.noaa.gov/news/swpc-issues-its-first-g4-watch-2005> > [favicon.ico]<https://www.swpc.noaa.gov/news/swpc-issues-its-first-g4-watch-2005> > > "Multiple CMEs erupted associated with flare activity from Region 3664 on > 07-09 > May. These CMEs are expected to merge with potential arrival expected by early > May 11 on the UTC day.” > > (Low but distinct possibility of effects to radio and transmission systems) > > FYI, > /John > > John Curran > President and CEO > American Registry for Internet Numbers -- Jay R. Ashworth Baylink j...@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
