Hi,
Can someone peer-check my settings please for my PDC. We have had time slip issues and this is my proposal:
Read articles and some blogs from Ace Fekay.
http://blogs.msdn.com/b/w32time/archive/2009/02/02/group-policy-settings-explained.aspx
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1318
http://support.microsoft.com/kb/816042
Environment
- Domain / Forest FL 2003
- All RWDC's / RODC's are 2008 R2
- PDC is virtual running on VMware. It is not syncing with ESX host, it is an NTP server syncing extrernally. All other DC's / Clients using NT5DS (Domain hierarchy). Incidentily the ESX host sync with external time source also.
PDC Registry Settings:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameter\
- Type: NTP
- NtpServer : 1.ntp.org,0x8 2.us.pool.ntp.org,0x8
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer
- Enabled : 1
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config
- MaxPosPhaseCorrection : 3600 (1 hour)
- MaxNegPhaseCorrection : 3600 (1 hour)
- AnnounceFlags : 5
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient\SpecialPollInterval
- set at 900 (15 min)
Run on the PDC:
- w32tm /config /manualpeerlist:1.us.pool.ntp.org,0x8 2.us.pool.ntp.org,0x8 /syncfromflags:manual /reliable:yes /update
H:\>w32tm /query /status
Leap Indicator: 0(no warning)
Stratum: 3 (secondary reference - syncd by (S)NTP)
Precision: -6 (15.625ms per tick)
Root Delay: 0.1389195s
Root Dispersion: 0.0470948s
ReferenceId: 0xAE85A8C2 (source IP: 174.133.168.194)
Last Successful Sync Time: 14/10/2011 10:37:18
Source: 2.us.pool.ntp.org,0x8
Poll Interval: 9 (512s)
Run on DC's
- w32tm /config /syncfromflags:domhier /update (then start / stop time service)
run on clients
- w32tm /resync
How does this look?