how to Configure and choice a EVC Mode

[henry_wang]

I have two Esxi5.1 hosts. Each server have two processors.  

One server cpu: Intel xeon E5-2665

Other server cpu: Intel Xeon E5645

Two servers belong to a same cluster,now I want to migrate those vm to another ESXI host, but it prompts：incompatibility,so I want to configure EVC Mode ,but I'm not sure how to choice a vmware Evc mode.please see below picture:

I tried all VMware EVC Mode but the disabled,then above five choices ,each choice will come out a warning about CPU compatibility,

may only select disabled.   whether I need to select Enable EVC for Intel Host and  Disable

I don't clear about EVC mode.so please help to analyze,thanks!

[markdjones82]

First server is "Sandy Bridge".  So you will want to set the new one to Sandy Bridge and then you can move the VM into it. Your new one is Westmere.  So you need to set it to the lowest CPU set in environment.

Please mark the answer correct or helpful if this answered your quesiton.

[abhilashhb]

The EVC mode should be Westmere. make sure you enable the EVC mode and then move machines into it. You cannot enable EVC on a already present cluster with VMs running in it.

[markdjones82]

Oops my mistake yes abhil is correct. I had a typo!

[henry_wang]

yes,I have already a cluster, so I can't configure EVC Mode to Westmere.

you mean that I must remove the cluster then enable EVC mode to westmere>is it right?thanks!

[Renmo · Accepted solution]

you need to follow the below KB to enable EVC mode

VMware KB: Enabling EVC on a cluster when vCenter Server is running in a virtual machine

[abhilashhb]

You can follow the article Taj provided.

At a high level you will have to create a new cluster, enable EVC and then move the hosts into that cluster one by one. If your vCenter is also part of this movement it will be a little tricky but the KB has all the steps.