[ntp:questions] ntpd (4.2.2p1) stays "synchronized to LOCAL"

Jordan Russell jr at no.email.please
Mon Dec 4 22:43:41 UTC 2006


My ntpd is no longer synchronizing with the servers specified in
ntp.conf, and I'm having trouble figuring out why.

ntp.conf looks like this:

restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict -6 ::1
restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
server ntppub.tamu.edu
server ntp1.cs.wisc.edu
server ntp-2.cso.uiuc.edu
server  127.127.1.0     # local clock
fudge   127.127.1.0 stratum 10
driftfile /var/lib/ntp/drift
keys /etc/ntp/keys

After 58 minutes of uptime, "ntpq -p" shows:

     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 ntp3.tamu.edu   128.194.254.7    2 u  386 1024  377   25.258  25459.4
8473.45
 caesar.cs.wisc. 128.105.201.11   2 u  383 1024  377   51.257  25474.1
8473.20
 ntp-2.gw.uiuc.e 128.174.38.133   2 u  442 1024  377   56.901  16496.2
8492.19
*LOCAL(0)        .LOCL.          10 l   49   64  377    0.000    0.000
 0.001

/var/log/messages shows:

Dec  4 15:38:02 ntpdate[16513]: step time server 128.194.254.9 offset
14.354204 sec
Dec  4 15:38:02 ntpd[16517]: ntpd 4.2.2p1 at 1.1570-o Fri Aug 18 13:04:14
UTC 2006 (1)
Dec  4 15:38:02 ntpd[16518]: precision = 1.000 usec
Dec  4 15:38:02 ntpd[16518]: Listening on interface wildcard,
0.0.0.0#123 Disabled
Dec  4 15:38:02 ntpd[16518]: Listening on interface lo, 127.0.0.1#123
Enabled
Dec  4 15:38:02 ntpd[16518]: Listening on interface eth0,
192.168.1.1#123 Enabled
Dec  4 15:38:02 ntpd[16518]: Listening on interface eth1,
76.187.xx.xx#123 Enabled
Dec  4 15:38:02 ntpd[16518]: kernel time sync status 0040
Dec  4 15:38:02 ntpd[16518]: getaddrinfo: "::1" invalid host address,
ignored
Dec  4 15:38:02 ntpd[16518]: frequency initialized 72.808 PPM from
/var/lib/ntp/drift
Dec  4 15:41:17 ntpd[16518]: synchronized to LOCAL(0), stratum 10
Dec  4 15:41:17 ntpd[16518]: kernel time sync enabled 0001

When ntpd is in this state, the clock loses roughly half a second every
minute, or about 10 minutes after a day of uptime (!).

I'm not sure if it's relevant, but I first noticed this problem about a
month ago around the time ntp was upgraded from 4.2.0a to 4.2.2p1 (as
part of upgrading from Fedora Core 5 and Fedora Core 6). Prior to that,
the system ran ntpd for years without any issues.

Any idea why this is happening?

P.S. This is a Pentium III machine running an Intel D815EEA motherboard
(i815 chipset). Linux 2.6.18.5 kernel.

--
Jordan Russell




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