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noir911 01-21-2009 06:55 PM

NTP high offset
 
I have two Redhat servers - RHEL ES 4 and RHEL AS 4 - running
ntp-4.2.0. I have modified the /etc/ntp.conf and /etc/ntp/ntpservers
to point them to my ntp server. But my network monitoring system is
saying that these two Redhat servers are having a high offset: Offset
57521.46715 secs and Offset -181.4311465 secs respectively.
No other server in my network is having this issue. If I restart ntpd
on these servers, the problem goes away for a few minutes but comes
back again.

/etc/ntp.conf file -

restrict default nomodify notrap noquery
restrict 127.0.0.1
server ntp1.mycompany.com
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
driftfile /var/lib/ntp/drift
broadcastdelay 0.008
keys /etc/ntp/keys

/etc/ntp/ntpservers file -

ntp1.mycompany.com

Thanks for any help resolving this issue.

TB0ne 01-22-2009 09:34 AM

Quote:

Originally Posted by noir911 (Post 3416722)
I have two Redhat servers - RHEL ES 4 and RHEL AS 4 - running
ntp-4.2.0. I have modified the /etc/ntp.conf and /etc/ntp/ntpservers
to point them to my ntp server. But my network monitoring system is
saying that these two Redhat servers are having a high offset: Offset
57521.46715 secs and Offset -181.4311465 secs respectively.
No other server in my network is having this issue. If I restart ntpd
on these servers, the problem goes away for a few minutes but comes
back again.

/etc/ntp.conf file -

restrict default nomodify notrap noquery
restrict 127.0.0.1
server ntp1.mycompany.com
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
driftfile /var/lib/ntp/drift
broadcastdelay 0.008
keys /etc/ntp/keys

/etc/ntp/ntpservers file -

ntp1.mycompany.com

Thanks for any help resolving this issue.

Are these VMware servers, by any chance?? If so, there is a kernel patch you'll have to get from RedHat, to fix this. There's a known issue with time drift on RHEL servers on VMware....


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