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VMware Hardware and Tools Upgrade Sequence

We are running ESXi 6 Update 2 host and need to upgrade our VMware hardware version from 7 to 11 on our older VM's. We have using VMtools versions 10.2. I have read the proper upgrade sequence is Vmtools then Vmware hardware. What we have found if that when upgrading Vmtools version to 10.2 on VM's running hardware version 7 would wipe the network settings in some cases. We contacted Vmware support and they stated we should upgrade the Vmware hardware firt. We have a couple hundred Vms to upgrade which are are spread across different clusters and host but all under the same vcenter server.

Thoughts?
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compdigit44
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compdigit44
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Always TOOLS first then Upgrade Virtual Hardware! (that is an exam question!)

VMware Tools can sometimes, uninstall and reinstall networking, and lose settings!

(it's a risk), screenshot settings before hand or use from documentation!

Like any changes, make sure you have valid backup of production, because VMware Tools or Upgrading Hardware mangles the Hardware Registry!

Also there is no reason to update the VM version unless you need the newer features!
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compdigit44Author Commented:
what is odd is the fact support told me to upgrade the hardware first since we had and issue of the network setting getting wiped
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Thoughts?

and if VMware Support "said jump of a cliff", would you also do that...

"We do what were told..."

Milgrams '37

The issue is changing any component of a virtual machine, VMware Tools upgrade, can and sometimes, does rip out the nic, and replace, and it has no settings.

sometimes changing the virtual hardware, resets the VM, because it changes the PCI Order of the hardware devices.

both changes are risky....

which comes back around to WHY?

are we changing hardware version and/or changing tools ?

Not sure if you have Change Control, and Change Board and Change Programme Manager, as to what they would say.....???
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compdigit44Author Commented:
We do have a stick Change Control process hence while I am writing up a plan to upgrade the VM hardwrae an tools post support recommendations.  I am not sure how true this is but once of or vendors Commvault stated running older Vm hardware version could impact performance on the VM with backups???
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Commvault stated running older Vm hardware version could impact performance on the VM with backups???

That is a statement which could be true. But rather than me give you the answer, I would ask Commvault to clarify that statement with evidence, rather than you give them the answer.

what what version of virtual machine hardware, 1 - 13 ?

impact performance on the VM with backups???

Does Commvault create a snapshot to backup the parent disk and VM ?

if it does performance of the VM is already impacted, so are they implying virtual machine version 7.0 causes worse performance in the VM.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Reached out to some Clients and Commvault big clients and they had never heard this foobar and Asked what Commvault had been smoking!?
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