RHEL 3.0 AS - NTPD Loses Synchronization and Resets Time

Dear Group ---

I upgraded a Dell PowerEdge 2600 from Red Hat Linux 8.0 to Red Hat
Enterprise Linux 3.0 AS. Now I get a regular (approximately once per
hour) set of complaints in my system log from the NTP daemon:

    May 18 01:02:11 neespopd ntpd[13362]: time reset 0.296762 s
    May 18 01:02:11 neespopd ntpd[13362]: synchronisation lost
    May 18 01:02:11 neespopd ntpd[13362]: system event 'event_clock_reset' (0x05)
                status 'leap_none, sync_unspec, 15 events, event_peer/strat_chg' (0xf4)
    May 18 01:02:11 neespopd ntpd[13362]: system event 'event_peer/strat_chg' (0x04)
                status 'leap_none, sync_unspec, 15 events, event_clock_reset' (0xf5)
    May 18 01:02:21 neespopd ntpd[13362]: peer 128.32.206.222 event 'event_reach' (0x84)
                status 'unreach, conf, 15 events, event_reach' (0x80f4)
    May 18 01:02:27 neespopd ntpd[13362]: peer 169.229.128.155 event 'event_reach' (0x84)
                status 'unreach, conf, 15 events, event_reach' (0x80f4)

Under Red Hat 8.0, the server ran steadily with hourly reports of a
frequency deviation around 45 ppm:

    May 11 10:14:34 neespopd ntpd[21369]: offset 0.001690 sec freq 44.585 ppm error 0.003856 poll 10

But now under RHEL I find the server reporting a frequency deviation
near 500 ppm:

    May 18 01:13:34 neespopd ntpd[13362]: offset 0.121897 sec freq 491.452 ppm error 0.247926 poll 6

This large frequency deviation would seem to be related to my host
doing time resets and reporting that synchronization was lost.

I'm surprised that an OS upgrade resulted in this behavior. But then
I've never had a machine where the clock and NTP are so at odds.
Another host on my LAN (RedHat 9.0) is happy with the same set of time
servers. Does anyone have some information on how I might correct
this issue so that NTP is happy and maintains synchronization?

 --- Don P

Donald A Patterson dap01952@uclink.berkeley.edu
NEES-ES LAN Administrator 510-231-9433
Richmond Field Station, UC Berkeley

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Received on Thu Jun 17 17:06:16 2004