VMware recommends syncing your Windows guests with DC and syncing your DC's with internal NTP server.
Mike _____ From: James Rankin [mailto:kz2...@googlemail.com] Sent: Friday, October 23, 2009 4:05 AM To: NT System Admin Issues Subject: Re: VMWare ESX time synchronisation I must say the few articles I have browsed since posting seem to indicate as such. The tools.syncTime option in the VMX seems to be the place to set it, but I tried that on one of my DCs and the option switched back to FALSE on restart. Seems that the options override the VMX file, rather than the other way around. I'll sync my DCs with the ESX servers only and see if that spreads a more accurate time throughout my environment. Strangely, the ESX servers are (at the moment) the only things keeping accurate time. This has only happened since we had an IronPort installed. It's almost as if the IronPort is blocking NTP traffic from our virtualised server subnets. Cheers, 2009/10/23 Straub, Patrick <patrick.str...@lanexpert.ch> James, If your virtualized DC runs out if time even you configured it to get the time from an external time server, but your ESX server on which it runs on is ok, than do this Tools settings only for the DC. Leave the other VMs to sync with your time master DC. It is not VMware best practices to set "Time synchronisation between the virtual machine and the ESX Server operating system" option in VMware Tools for all VMs. Patrick _____ From: James Rankin [kz2...@googlemail.com] Sent: Friday, October 23, 2009 10:42 To: NT System Admin Issues Subject: VMWare ESX time synchronisation Anyone know if there is any way to automate the setting of "Time synchronisation between the virtual machine and the ESX Server operating system" option in VMWare Tools? I want to enable this on all of my virtual servers as doing it in this fashion seems to work more effectively than sync'ing everything from my virtualised PDCe. However, I don't fancy logging on to each one individually and checking the box....does anyone know if there is a way of automating the setting of this option? My Googling appears to be tinged with week-ending weariness.... TIA, JRR -- "On two occasions...I have been asked, 'Pray, Mr Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." http://raythestray.blogspot.com -- "On two occasions...I have been asked, 'Pray, Mr Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." http://raythestray.blogspot.com ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
