I am on the process of upgrading the esxi from 5.1 to 6. The vcenter is going to be vsphere 6 update1.
The new cluster will have mixer of 5.1 and 6.U1 during the upgrade process for month or more. Is it advisable to keep the the mismatch version in the cluster provided the vm hardware version stays as on the old ver5.1?
If i can keep the ver5.1 and and 6 in the cluster ,Should I have to upgrade the vmtools whether VM resides on esxi5.1 or 6?
Appreciate your comments on this.