Hello,
I'm new to configuring NTP, and am having a bit of trouble figuring out why there are regular spike_detect messages on my syslog. I already checked the connection to the NTP server and it is stable with no packet drops. Additionally, that same NTP server is used by another machine on the same network and it is synchronizing fine. So it seems isolated to this particular machine. I find one particular sequence curious. From 17:30 to 18:53, there was a positive spike, followed by a negative spike, followed by a positive spike interleaved with clock_sync. Can you give me some hints regarding what may be causing this? Jun 5 14:48:32 info localhost ntpd[13659]: Listen normally on 48 bond0 10.119.218.249 UDP 123 Jun 5 14:48:32 info localhost ntpd[13659]: Listen normally on 49 lo ::1 UDP 123 Jun 5 14:48:32 info localhost ntpd[13659]: Listen normally on 50 bond0 fe80::217:a4ff:fe77:c38 UDP 123 Jun 5 14:48:32 info localhost ntpd[13659]: Listening on routing socket on fd #68 for interface updates Jun 5 14:48:32 info localhost ntpd[13659]: 0.0.0.0 c016 06 restart Jun 5 14:48:32 info localhost ntpd[13659]: 0.0.0.0 c012 02 freq_set kernel 0.059 PPM Jun 5 14:50:21 info localhost ntpd[13659]: 0.0.0.0 c615 05 clock_sync Jun 5 15:03:36 info localhost ntpd[13659]: 0.0.0.0 0618 08 no_sys_peer Jun 5 15:07:55 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.269228 s Jun 5 15:16:37 info localhost ntpd[13659]: 0.0.0.0 061c 0c clock_step +0.303049 s Jun 5 15:16:37 info localhost ntpd[13659]: 0.0.0.0 0614 04 freq_mode Jun 5 15:16:38 info localhost ntpd[13659]: 0.0.0.0 c618 08 no_sys_peer Jun 5 15:31:55 info localhost ntpd[13659]: 0.0.0.0 c612 02 freq_set kernel -186.040 PPM Jun 5 15:31:55 info localhost ntpd[13659]: 0.0.0.0 c615 05 clock_sync Jun 5 15:42:11 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.147942 s Jun 5 15:56:51 info localhost ntpd[13659]: 0.0.0.0 0618 08 no_sys_peer Jun 5 16:02:50 info localhost ntpd[13659]: 0.0.0.0 061c 0c clock_step +0.338653 s Jun 5 16:02:50 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 16:02:51 info localhost ntpd[13659]: 0.0.0.0 c618 08 no_sys_peer Jun 5 16:06:14 info localhost ntpd[13659]: 0.0.0.0 0628 08 no_sys_peer Jun 5 17:30:59 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.130410 s Jun 5 17:33:09 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 17:47:21 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect -0.136758 s Jun 5 18:01:30 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 18:53:59 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.165088 s Jun 5 19:01:40 info localhost ntpd[13659]: 0.0.0.0 0618 08 no_sys_peer Jun 5 19:03:51 info localhost ntpd[13659]: 0.0.0.0 061c 0c clock_step +0.306834 s Jun 5 19:03:51 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 19:03:52 info localhost ntpd[13659]: 0.0.0.0 c618 08 no_sys_peer Jun 5 19:31:08 info localhost ntpd[13659]: 0.0.0.0 0628 08 no_sys_peer Jun 5 19:58:28 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.130703 s Jun 5 20:05:00 info localhost ntpd[13659]: 0.0.0.0 061c 0c clock_step +0.281475 s Jun 5 20:05:00 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 20:05:01 info localhost ntpd[13659]: 0.0.0.0 c618 08 no_sys_peer Jun 5 20:34:30 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect -0.167769 s Jun 5 20:36:40 info localhost ntpd[13659]: 0.0.0.0 0618 08 no_sys_peer Jun 5 20:40:00 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 20:53:04 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.184006 s Jun 5 21:05:06 info localhost ntpd[13659]: 0.0.0.0 061c 0c clock_step +0.415902 s Jun 5 21:05:06 info localhost ntpd[13659]: 0.0.0.0 0615 05 clock_sync Jun 5 21:05:07 info localhost ntpd[13659]: 0.0.0.0 c618 08 no_sys_peer Jun 5 21:08:28 info localhost ntpd[13659]: 0.0.0.0 0628 08 no_sys_peer Jun 5 21:32:26 info localhost ntpd[13659]: 0.0.0.0 0638 08 no_sys_peer Jun 5 22:38:01 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect +0.132145 s Regards, Sean Critica _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
