I need some help with following situation.
We have an ESX 5.5 cluster (no EVC configured) with several hosts with Intel Xeon E5-2680 v2 cpu's. We wanted to extend the cluster with 4 new hosts. The problem is that the new hosts got Intel Xeon E5-2680 v3 cpu's which are the newer version of the same cpu. I've found several topics where people mention that it isn't a good idea to mix v2 and v3 in 1 cluster without enabling EVC. I want to enable EVC but of course without rebooting the active vm's. I've created a new cluster with EVC enabled (Sandy bridge EVC mode), added the 4 new hosts no problem so far. But how can I add the other hosts where active vm's are running to this new EVC enabled cluster without rebooting those vm's. Is this even possible? I've tried disconnecting the host in vCenter moving it to the EVC enabled cluster and connecting it again but even that failed.
Anyone who can give me some advice?
Thanks in advance.