[ntp:questions] NTP and VMware

Kennedy, Paul P.Kennedy at fugro.com.au
Tue Aug 14 05:40:35 UTC 2012


Hi Ali,
when you state ' do not synchronize their times with the server', what
do you mean?

if you run 'ntpq -p' on the client side, you should see something like
this....

     remote           refid      st t when poll reach   delay   offset
jitter
========================================================================
======
 SHM(3)          .XPPS.           0 l    -    8    0    0.000    0.000
0.000
 SHM(2)          .XZDA.           0 l    -    8    0    0.000    0.000
0.000
+172.23.21.221   .PPSE.           1 u    7    8  377    0.260    1.631
0.532
*172.23.21.9     .GPS.            1 u    8    8  377    0.443    1.386
0.448
 172.23.21.244   .STEP.          16 u   4d    8    0    0.000    0.000
0.000
 TD-GITCENTRAL   172.23.21.9      2 u    4    8  377    0.163    0.196
1.284
 172.23.21.243   .PPSI.           1 u    7    8  377    0.198    1.976
0.864

The important part here (for now) is the reach to the server.  if 377,
you have a good connection between the client and the server.  Once
connection is proven, we can deal with the clock selection process.

regards



-----Original Message-----
From: questions-bounces+p.kennedy=fugro.com.au at lists.ntp.org
[mailto:questions-bounces+p.kennedy=fugro.com.au at lists.ntp.org] On
Behalf Of Ali Nikzad
Sent: Tuesday, 14 August 2012 12:35 PM
To: questions at lists.ntp.org
Subject: [ntp:questions] NTP and VMware

Hi,

I have a cluster which its computers are not connected to Internet. One
Linux based and five ESXi based servers which host virtual machines in a
vSphere cluster. I need time synchronization between the hosts. Since
ESXi supports NTP, I configured the Linux based node to serve as the NTP
server and the ESXi nodes as NTP clients.

I configured the server's ntp.conf as follows:

#192.168.2.10
driftfile /etc/ntp.drift
server 127.127.1.0
fudge 127.127.1.0 stratum 10
tos cohort 1 orphan 11
restrict source nomodify
restrict 192.168.2.0 mask 255.255.255.0 nomodify notrap


and the clients' ntp.conf file:

#192.168.2.X
driftfile /etc/ntp.drift
server 192.168.2.10
tos cohort 1 orphan 11
restrict source nomodify
restrict default kod nomodify notrap nopeer restrict 127.0.0.1

The problem is clients do not synchronize their times with the server.
What can be the cause of the problem?

Thank you,
Ali
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