vSphere upgrade from 5.1 to 5.5

What is the best way to upgrade from 5.1 to 5.5?
Is it possible via the vCenter 5.1 update manager?

What should I install first, the vCenter or the ESXi hosts updates?

Thanks
IT_Group1Asked:
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AbhilashBloggerCommented:
There is no best way to upgrade it. It depends on what kind of upgrade you can do. You can interactively upgrade it by loading the CD(ISO).
You can do a command line upgrade or by using the update manager.
I would say update manager is a better way.

 
For methods to upgrade to 5.5 you can check the below KB Article that will talk about all possible/supported methods
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2058352

Yes it is possible to do it using the update manager.

You will have to upgrade the vCenter first and then the hosts.
Always remember that vCenter will not be able to manage hosts higher than its version. It can only manage its version or lower version hosts.
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IT_Group1Author Commented:
Great thanks
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