Moving ESXi 6 hosts to new vCenter 6.5 appliance

Greetings,

I need to disconnect (2) ESXi 6 hosts from a vCenter 6 appliance and add to a new vCenter 6.5 appliance, both which run on one of the hosts. Simple set up. No distributed switch and no cluster. Seems straightforward to disconnect then add to the new vCenter appliance. However, please let me know if there are any caveats going from vCenter 6 to 6.5 or adding ESXi 6 hosts to vCenter 6.5. FYI, some VMs on these hosts are version 8 VMs. Not sure if that matters outside of some management not being available. I am also doing this during business hours so please let me know if it's better to wait until after hours (which I usually do for anything on production servers but I was asked to do it asap if possible).

Thanks
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king daddyAsked:
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Ajay ChananaMCSE-2003/08|RHCSA| VCP5/6 |vExpert2018Commented:
Since you are on standard switch moving the host to another vcenter will not be an issue. also there will not be any disruption in VM communication.

checking on hardware version stay tuned.
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Ajay ChananaMCSE-2003/08|RHCSA| VCP5/6 |vExpert2018Commented:
You can smoothly move the esxi for sure.  No impact for virtual machine version 8 - 6.5 support very well.

Reference:-
https://kb.vmware.com/s/article/2007240


Let me know if you have any further questions?
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king daddyAuthor Commented:
Thanks Ajay. I appreciate the info.
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Seth SimmonsSr. Systems AdministratorCommented:
any reason for not doing an upgrade of the existing appliance?
i did that a few months ago and was flawless
it creates a new 6.5 appliance then migrates the database over...very clean
did it during business hours with no impact; guests run uninterrupted on each host

seems doing it this way you have configure vCenter over again for your environment
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king daddyAuthor Commented:
Hi Seth. Old admin left and we just took over. Don't know sso password for current vCenter and its got some other issues so I figured we should just build a fresh one and then set up a cluster and HA. Upgrade would have been much better though. Thanks.
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king daddyAuthor Commented:
Thanks guys
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