Dave wrote: > David Woolley wrote: ositive and negative steps which approximately balance each other >> indicate a heavily loaded link with variable and asymmetric >> propagation delays. Apart from local servers, or your Rubidium PPS, >> or reducing the traffic, the other solutions are to apply and get the >> ISP to apply traffic shaping to prioritise NTP traffic, or to use the >> tinker huff and puff option, noting the health warnings attached to it. > > > I've changed to local servers as suggested
That wasn't my suggestion. The usual location of the problem with balanced positive and negative steps is the link to your ISP, so using UK servers wouldn't make a difference. You've actually got runs of positive and negative steps, which is worrying. Normally pure runs of postive steps indicate a lost interrupt problem. Runs in a consistent direction and of similar size and interval generally indicate that something else is trying to discipline the clock. Alternating steps in positive and negative directions tends to indicate an overloaded, asymmetric link, but if you have a severe problem you tend to have the server rejected (which is why the problem is less common with analogue modems), rather than accumulating a large correction. Missed interrupts may be a problem if runs last long enough for ntpd to adapt to the new, effective, frequency. > > server 0.uk.pool.ntp.org > server 1.uk.pool.ntp.org > server 2.uk.pool.ntp.org > server 3.uk.pool.ntp.org > _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
