[ntp:questions] Is there any non-obvious reason why NTP won't increase the polling rate on a new system?
pete+usenet at heypete.com
Tue Jul 24 15:32:56 UTC 2007
In most of the local stratum 2-3 servers I've setup for the first time,
they spend an hour or two querying the remote servers at 64s. Within a
few hours, they increase the polling time up to 1024s and there they
remain barring any major problems.
Yesterday I configured a new stratum 2 system. With a basic ntp.conf
file it fetches time and syncs the clock to the proper time within a
few milliseconds. However, even after running for 13+ hours, it refuses
to increase the poll interval higher than 64s.
The frequency is reported as -17.264 in the ntp.drift file.
The network is asymmetrical (cable) but stable and relatively
low-latency (delays range from about 33ms-53ms for the remote server).
Jitter is between 1.5-3.8. Reach values for each server are 377. Offsets
range between 0.4-6.1ms, which isn't bad. The network is completely
unused except for outgoing NTP queries and occasional checking of email.
There've been no periods of unavailability, high latency, or other
The system's been running for 13 hours with no significant load other
than that provided by ntp (load averages are 0.13, 0.10, 0.06). The
computer is within an air-conditioned room with a relatively stable
temperature of ~70F.
I've checked everything(?) that's would obviously cause problems
(network problems, temperature swings, etc.). Everything looks to be
proper and conducive to good working order. Is there anything that I
might be missing that would result in ntpd not increasing the polling
interval? I haven't restarted the service or the computer, as I figured
that ntpd would work itself out once time went on.
Something seems borked, and I don't want to pester the upstream time
servers with queries every minute.
 Ubuntu Linux 7.04. Running ntpd v4.2.2p4, the version installed from
the Ubuntu packages server.
restrict default kod notrap nomodify nopeer
restrict 127.0.0.1 nomodify
[various lines related to statistics]
server nist1-sj.witime.net iburst prefer
server pubts0-sj.witime.net iburst
server clock.sjc.he.net iburst
server time.sonic.net iburst
server tick.qwest.net iburst
server ntp2.mainecoon.com iburst
 Does anyone have any means of reaching the time server admins at
witime? Their pubts1-sj.witime.net server is seriously borked, and the
ntp.conf files of their other public stratum 2 servers are misconfigured
-- instead of peering with each other, they're peering with non-existent
systems on Time Warner Telecom's network due to someone mistyping the IP
addresses. I wrote to the contact address on their website (info@), but
have yet to receive any response. Fortunately, their stratum 1 servers
they're running for NIST are working all right.
More information about the questions