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To configure the reliable external time source for PDC

Posted on 2011-02-27
Medium Priority
Last Modified: 2012-05-11
I want to synchronize my PDC server with global time server for the time zone (GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi.
I know this can be achieved by the command w32tm /config /syncfromflags:manual /manualpeerlist:<PeerList>
but I need the reliable time source for this sync.
Question by:sivark14
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LVL 85

Expert Comment

ID: 34991385
You're missing the /update option on your command line, and you should add ",0x9" after each host to tell the time service to work in client mode and use the special poll interval. UDP port 123 outbound must be allowed in the firewall.

w32tm /config /manualpeerlist:",0x9,0x9" /syncfromflags:manual /update
w32tm /resync

Replace with a time server geographically near you, for example from here:

Or here:
A list of the Simple Network Time Protocol (SNTP) time servers that are available on the Internet

Author Comment

ID: 34991527
Hi Thanks for giving the solution. While check for India — in.pool.ntp.org, it says 11 servers are available for this zone.How I can get all the servers ip and if I specify the ip for in.pool.ntp.org, is it ok for the sync or ..
Is there any prerequests for this synchronization? We have configured the only proxy server  to connect internet in PDC ..
LVL 85

Accepted Solution

oBdA earned 2000 total points
ID: 34991560
Just click the link on the India zone, and it will tell you the servers to use.
w32tm /config /manualpeerlist:"0.in.pool.ntp.org,0x9 1.asia.pool.ntp.org,0x9 2.asia.pool.ntp.org,0x9" /syncfromflags:manual /update
w32tm /resync
And as I said, UDP port 123 from the PDCe to the respective servers needs to be allowed.
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Author Comment

ID: 34991597
Thanks for the update, Let me configure and will update you tomorrow.

Author Comment

ID: 35007556
I did the configuration but when I resync using w32tm /resync , am getting The computer did not resync because no time data was available.
LVL 85

Expert Comment

ID: 35031113
Have you tried different time servers?
Did you check whether UDP(!) port 123 to the respective time servers is allowed?

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