Will HA restart VM in case of Management Network Down?

[beckham007fifa]

Hi -

I would like to know how Datastore heart beat is used to facilitate HA in a Vspehere clusters.

If I have isolation response set to "leave powered on" will management network unavailability restart the Virtual machines in the cluster?

[rcporto]

Take a look here: http://www.yellow-bricks.com/2011/10/11/vsphere-5-ha-isolation-response-which-one-to-pick/

When to use “Leave Powered On”

This is the default option and more than likely the one that fits your organization best as it will work in most scenarios. When you have a Network Isolation event but retain access to your datastores HA will not respond and your virtual machines will keep running. If both your Network and Storage environment are isolated then HA will recognize this and power-off the VMs when it recognizes the lock on the VMDKs of the VMs have been acquired by other VMs to avoid a split brain scenario as explained above. Please note that in order to recognize the lock has been acquired by another host the “isolated” host will need to be able to access the device again. (The power-off won’t happen before the storage has returned!)

Another good article about datastore heartbeating; Datastore Heartbeating and preventing Isolation Events? - Yellow Bricks