Is the directory /var/lib/ntp present, and with write permissions for the 'ntp' user? Does the drift file exist? Does ntpd ever lock in? What do you see in 'ntpq -p' over time? Are these heavily-loaded boxes, or boxes with wildly-varying loads?
$ ll /var/lib/ntp total 4 -rw-r--r-- 1 ntp ntp 7 Aug 12 15:17 drift
$ cat /var/lib/ntp/drift 11.395
# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== +server01 some.ip 3 u 81 1024 377 0.455 1.174 0.199 *server02 some.ip 3 u 850 1024 377 0.420 2.109 0.212
What do you mean by 'Does ntpd ever lock in?' ? These boxes are idle pretty much.
thanks