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Adding ESXi V5.5 to vSphere V5

Adding New Host Add New Host FinishHost DisconnectedDowngrade LicenseI have VMWare box with ESX V5 and I have been managing a couple of hosts thru vSphere V 5.0.
When I just tried to add a new Host w/ ESXi V5.5, I got an error "Disconnected" (please see the screenshots) and later on, the new host disappeared from vSphere Client.

Can you help?

Edited: Andrew Hancock aka hanccocka
VMware Zone Advisor
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sglee
Asked:
sglee
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2 Solutions
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you have ESXi 5.5 IT MUST be managed by vCenter 5.5.

Are you using VMware vSphere vCenter Server 5.5 ? vCenter Server 5.5 can manage ESXi 4.x, 5.0, 5.1 and 5.5.

But vCenter 5.0 cannot manage ESXi 5.5.

Support Matrix is here

http://partnerweb.vmware.com/comp_guide2/sim/interop_matrix.php
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sgleeAuthor Commented:
vCenter ServerYes I do have vCenter 5.0. When I download vCenter V5.5, I have two questions.
(1) Do I need to uninstall v5 and install V5.5?
(2) After installation of vCenter V5.5, do I enter the same license key (given when I purchased vCenter 5) in the vSphere client?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
1. Upgrade to vCenter 5.5 is supported from vCenter 5.0.

2. Upgrade will maintain all the License Keys.

Now, be warned Upgrades of vCenter 5.0 to vCenter 5.5, do go wrong! and the result is you will not be able to login to the new vCenter 5.5 server. (this does not affect VMs!)

So you may want to consider Upgrade versus New Installation.
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sgleeAuthor Commented:
"be warned Upgrades of vCenter 5.0 to vCenter 5.5, do go wrong! and the result is you will not be able to login to the new vCenter 5.5 server. " ---> I will uninstall existing vCenter V5 and install V5.5 then.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It's often the best method....
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