Greetings.
Please check your 'Power restore policy' in the server's CIMC GUI.
Step 1 In the Navigation pane, click the Compute menu.
Step 2 In the work pane, click the Power Policies tab.
Step 3 In the Power Restore Policy area, update the following fields:
The action to be taken when chassis power isrestored after an unexpected
power loss. This can be one of the following:
• Power Off—The server remains off until it is manually restarted.
• Power On—The server is allowed to boot up normally when power
is restored. The server can restart immediately or, optionally, after
a fixed or random delay.
• Restore Last State—The server restarts and the system attempts
to restore any processes that were running before power was lost.
Sounds like it probably needs to be set to 'power on' and maybe with a delay.
Inside of ESXi, which hosts your call manager related VMs, there is are guestVM start up options, which can have startup delays defined.
Sounds like we want to have your Physical server and ESXi hypervisor startup as soon as possible, but might want your guest VMs to have a sizeable startup delay, until all the other network service dependencies are online.
Different versions of ESXi have differing ways of displaying the guestVM startup timing.
On ESXi 7.0, it looks look this:
You might want to check with your networking team to find out what the average amount of time is for your dhcp services are to become available, and then pad that time with a couple of extra minutes.
Kirk...
