Recommended NTP Settings for virtual 2008 R2 PDC (on VMWare)

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?

Hi,
Thanks for posting here.
So have you got any problem with current settings in virtualization environment?
Maybe you can take look the blog post below, some suggestions on how to set NTP service on domain controller in virtualization environment have been discussed in that
for reference :
Virtualization of Domain Controllers part Deux
http://blogs.technet.com/b/janelewis/archive/2008/06/20/virtualization-of-domain-controllers-part-deux.aspx
Virtual Domain Controllers and Time Synchronisation
http://blogs.technet.com/b/pfe-ireland/archive/2008/05/08/virtual-domain-controllers-and-time-synchronisation.aspx
Thanks.
Tiger Li
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