> When it shows an unsuccessful poll, I don't see a query at that time, > but I do typically see a couple of others at about the relevant time, > perhaps 4 - 6 seconds apart. These ones don't appear in the monitor log.
The most likely explanation is routing glitches. I'd try to establish a traceroute between the monitor and the server and see whether this reveals oddities. Tracing to your system, I get ... 6 10gigabitethernet5-3.core1.lon1.he.net (2001:470:0:1d2::1) 30.992 ms 30.548 ms 30.881 ms 7 a.armless.thn.aaisp.net.uk (2001:8b0:0:53::5a9b:3506) 25.585 ms 26.004 ms 25.919 ms 8 b.gormless.thn.aaisp.net.uk (2001:8b0:0:53:203:97ff:fe05:c000) 26.413 ms 26.055 ms 26.437 ms 9 7.a.0.1.0.0.0.0.0.0.0.0.0.0.0.0.1.1.1.1.1.1.1.1.0.b.8.0.1.0.0.2.ip6.arpa (2001:8b0:1111:1111::10a7) 671.539 ms 667.176 ms 674.588 ms 10 * * * 11 * * * Notice that the first hops have pretty good roundtrip times, and then performance degrades massively when it hits your network; 0.5s is a really bad roundtrip time for an NTP server. Regards, Martin _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
