Losschris
Contributor
Contributor

EXSI 6.5 and 7.0 on vSphere 7

We recently upgraded to vSphere 7 and with this years budget ordered about half of our hosts for replacement. In this way we will be running EXSI 6.5 on the older machines and was looking at EXSI 7 on the new hosts. This is our first time running a mixed EXSI environment and is there anything we should worry about or stay with EXSI 6.5 until we replace the rest of the hosts next year?

Thanks for the assistance of anyone who answers!

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pdirmann01
Enthusiast
Enthusiast

You can technically run mixed version clusters, but you do need to keep in the back of your head that everything in vCenter will need to remain at the lowest common version or else you will limit your guest placements. Example - if you upgrade VM hardware or VMTools past 6.5-compatible versions, then those VMs will only be able to run on your new hosts, thus possibly limiting availability. New features, datastores and VDS need to be taken into consideration as well. Example - 7.0U2 provides the ability to have a native key provider so that you can make use of encryption-based features. If you implement this and encrypt data stores or VMs then you'll run into some problems with your 6.5 hosts. I personally recommend to run mixed mode temporarily. Perhaps you can split the workload, i.e., non-prod on the 6.5 and prod on the 7 or something along those lines.

andespoint
Contributor
Contributor

Hi @Losschris 

Another great resource is https://docs.vmware.com

IRIX201110141
Virtuoso
Virtuoso

Just enable EVC on your Cluster and limit the vHW to ESX 6.5 and keep an eye on it. Just a note you have to bring vCenter to 7.0 when you would like to manage ESXi 7.0 first.

Regards,
Joerg

Losschris
Contributor
Contributor

Thank you for the information and the response. 

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