I found my AS was not keeping time at all on Server2008R2 VM.
I did the follownig:
1. Ensure time synchronisation is enabled in the Hyper-V settings under "Integration Services"
2. Logged in as root via ssh on the OpenVPN-AS
3. Change the line in the file: /boot/grub/menu.lst
From:
kernel /vmlinuz-2.6.24-16-generic root=UUID=08306d75-360f-453f-8a50-5ef840aed058 ro quiet splash
to:
kernel /vmlinuz-2.6.24-16-generic root=UUID=08306d75-360f-453f-8a50-5ef840aed058 clock=pmtmr divider=10 ro quiet splash
Write and quit from vi.
4. Sync the time to a valid ntp source with the command replacing "Name_of_NTP_Server" with a real ntp server name or IP address:
ntpdate Name_of_NTP_Server
5. Set the hardware clock with the command:
hwclock -–systohc
6. Reboot the AS
Clock seemed fine thereafter.
Thanks to this article that put me on the right track:
http://paulgibbs.wordpress.com/2010/02/06/configuring-trixbox-to-run-in-a-hyper-v-vm-with-proper-time-sync-and-integration-components/
I hope these steps will be of help to others having the same issue.
