Dan, I am seeing approx. 170ms times to ntplax7.ntppool.net (monitoring server) on a traceroute.
At hop 7 it enters ntt.net (NTT America) in NYC where almost 100ms is added to the transit time. London time is 24ms, NYC time is 120ms so it appears there is high latency on the transatlantic link. My transit time to a Raleigh datacenter server is 128ms over the same transatlantic circuit. So it seems Virgin Media upstream provider NTT America is the possible cause of these problems. I will open a ticket in the morning about this Thank you, Ron On Mon, Feb 20, 2017 at 9:23 PM, Dan Geist <[email protected]> wrote: > The latency tracing to your IP from my ISP is pretty dramatic. I'm at 17 > ms from Atlanta, GA to Ashburn near D.C. From that point, there's a jump to > around 143 ms. > > I'd suspect an upstream network issue that started around the same time as > your stats went down the tubes. The last 4 hops between that point and the > server are only a couple of ms. > > Dan > > ----- Original Message ----- > > From: "Ron Hahn" <[email protected]> > > To: "pool" <[email protected]> > > Sent: Monday, February 20, 2017 2:03:00 PM > > Subject: [Pool] Why is my server score suddenly so poor? > > > Colleagues, > > > > Looking for some help here as I have spent a lot of time looking at this > > without any improvements. :-( > > > > Since early Friday, 17th the pool monitoring server was reporting that my > > pool server: > > > > http://www.pool.ntp.org/scores/89.101.218.6 > > > > in increasingly negative scores - anywhere between -20 and -60 range. > All > > over up and down. :-( > > > > So thinking that something has gone horrible wrong on my side I check: > > > > - fibre interface (and reboot) > > - switch (also reboot, no changes in some months) > > - firewall config (logs and rules) > > - LeoNTP appliance (reboot and also firmware upgrade as well) > > - swap of stratum 1 source > > - WAN utilisation (20-30%) > > > > I am finding nothing to explain why such low scores all of a sudden. > > > > I compared the LeoNTP box to my other stratum 1 sources and they are > within > > <1ms of each other - so I think time is good and not false ticking. > > > > I also wrote a script on my Raleigh (US) server to run ntpdate against > this > > every 5 minutes overnight. Only 4 timeouts in the entire night and some > > time this morning. > > > > Can anyone offer suggestions as to what to check next as this causing me > a > > big head ache now. > > > > Thank you for the help, > > > > Ron > > _______________________________________________ > > pool mailing list > > [email protected] > > http://lists.ntp.org/listinfo/pool > > -- > Dan Geist dan(@)polter.net > > _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
