Discussion:
NTP Server for time sync
(too old to reply)
The Jason
2010-06-24 02:32:22 UTC
Permalink
Hi all. As I understand it, if I configure the PDC Emulator to sync
with an NTP server by setting:

w32time\parameters\NtpServer=time.example.com,0x1
w32time\parameters\Type=NTP

my PDC emulator seems to sync time with [w32tm /resync] even if the
NTP server does not exist. In fact, it even tells me the command
completed successfully and I don't always get an error in the log.

My understanding is the DC will use its internal clock for a time
source if the NTP server is not working. Is there any way to turn this
functionality off? Since an error is not always generated, what is the
best way to confirm the NTP server is the source being used?

thanks

- j
unknown
2010-06-24 05:18:09 UTC
Permalink
Hello The,

In a domain the DC with the PDCEmulator role is the time source, all other
DCs sync with that one and the rest of the odmain sync with an available DC.

If possible configure the PDCEmulator to a time server(not domain member),
router/switch/NTP device or external time server:
w32tm /config /manualpeerlist:PEERS /syncfromflags:manual /reliable:yes /update

With "PEERS" you can set the time source, either DNS name (time.windows.com)
or an ip address from a reliable time source.

Here you can find some of them:
http://www.pool.ntp.org/


Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm
Post by The Jason
Hi all. As I understand it, if I configure the PDC Emulator to sync
w32time\parameters\NtpServer=time.example.com,0x1
w32time\parameters\Type=NTP
my PDC emulator seems to sync time with [w32tm /resync] even if the
NTP server does not exist. In fact, it even tells me the command
completed successfully and I don't always get an error in the log.
My understanding is the DC will use its internal clock for a time
source if the NTP server is not working. Is there any way to turn this
functionality off? Since an error is not always generated, what is the
best way to confirm the NTP server is the source being used?
thanks
- j
The Jason
2010-06-24 21:39:04 UTC
Permalink
On Jun 23, 10:18 pm, w32tm /config /manualpeerlist:PEERS /
Post by unknown
Hello The,
In a domain the DC with the PDCEmulator role is the time source, all other
DCs sync with that one and the rest of the odmain sync with an available DC.
If possible configure the PDCEmulator to a time server(not domain member),
w32tm /config /manualpeerlist:PEERS /syncfromflags:manual /reliable:yes /update
With "PEERS" you can set the time source, either DNS name (time.windows.com)
or an ip address from a reliable time source.
Here you can find some of them:http://www.pool.ntp.org/
Best regards
Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!!http://www.blakjak.demon.co.uk/mul_crss.htm
Post by The Jason
Hi all. As I understand it, if I configure the PDC Emulator to sync
w32time\parameters\NtpServer=time.example.com,0x1
w32time\parameters\Type=NTP
my PDC emulator seems to sync time with [w32tm /resync] even if the
NTP server does not exist. In fact, it even tells me the command
completed successfully and I don't always get an error in the log.
My understanding is the DC will use its internal clock for a time
source if the NTP server is not working. Is there any way to turn this
functionality off? Since an error is not always generated, what is the
best way to confirm the NTP server is the source being used?
thanks
- j- Hide quoted text -
- Show quoted text -
I understand all that, and thank you. Unfortunately, that does not
address my question exactly.

I have the PDCEmulator configured to use an NTPServer, but I have
tried putting an invalid server, yet it still sync'd with "w32tm /
resync" ! From what I read, the PDCEmul
The Jason
2010-06-24 21:41:50 UTC
Permalink
Post by The Jason
On Jun 23, 10:18 pm, w32tm /config /manualpeerlist:PEERS /
Post by unknown
Hello The,
In a domain the DC with the PDCEmulator role is the time source, all other
DCs sync with that one and the rest of the odmain sync with an available DC.
If possible configure the PDCEmulator to a time server(not domain member),
w32tm /config /manualpeerlist:PEERS /syncfromflags:manual /reliable:yes /update
With "PEERS" you can set the time source, either DNS name (time.windows.com)
or an ip address from a reliable time source.
Here you can find some of them:http://www.pool.ntp.org/
Best regards
Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!!http://www.blakjak.demon.co.uk/mul_crss.htm
Post by The Jason
Hi all. As I understand it, if I configure the PDC Emulator to sync
w32time\parameters\NtpServer=time.example.com,0x1
w32time\parameters\Type=NTP
my PDC emulator seems to sync time with [w32tm /resync] even if the
NTP server does not exist. In fact, it even tells me the command
completed successfully and I don't always get an error in the log.
My understanding is the DC will use its internal clock for a time
source if the NTP server is not working. Is there any way to turn this
functionality off? Since an error is not always generated, what is the
best way to confirm the NTP server is the source being used?
thanks
- j- Hide quoted text -
- Show quoted text -
I understand all that, and thank you. Unfortunately, that does not
address my question exactly.
I have the PDCEmulator configured to use an NTPServer, but I have
tried putting an invalid server, yet it still sync'd with "w32tm /
resync" ! From what I read, the PDCEmul- Hide quoted text -
- Show quoted text -
oops... sent before finishing by accident!

Anyway, even though the pdc emulator was configured to get time from
an ntp server, it still seemed to sync to the right time with "w32tm /
resync" even with an invalid ntp server. From what I understand, the
server will use its internal clock if it cannot access the configured
ntp server. Instead of retyping my whole question, please see above.

thanks!!

- jason

Loading...