How to Migrate vSphere 5.5 to vSphere 6.5?

Points of My Scenario:
1. I am admin of a single vCenter instance (version 5.5) supporting 6 clustered ESXi hosts (ESXi 5.5 U3) and 4 standalone ESXi 5.5 hosts
2. I must replace all clustered hosts with new, upgraded hardware with a higher processor architecture.
3. Objective A: implement a new, un-linked vCenter 6.5 instance on the new hardware
4. Objective B: deploy six new ESXi 6.5 hosts in a cluster on the new vCenter 6.5 instance
5. Objective C: migrate the four standalone (un-clustered) ESXi 5.5 hosts into the new vCenter 6.5 instance
6. Objective D: migrate all VMs from the old vSphere 5.5 cluster into the new vSphere 6.5 cluster

QUESTION: Regarding Objective D - how can I VMotion (or otherwise migrate) virtual machines from one instance of vCenter (5.5) to a completely separate instance of vCenter (6.5)?
waltforbesSenior IT SpecialistAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
6. Objective D: migrate all VMs from the old vSphere 5.5 cluster into the new vSphere 6.5 cluster

add all the ESXi 5.5 hosts to vCenter Server 6.5 and vMotion caveat here for Live Migration is Processor Types are same generation, otherwise EVC will need to be enabled, shared storage must be connected to both ESXi 5.5 and ESXi 6.5 hosts, and vMotion networks must be able to communicate.

e.g. remove current ESXi 5.5 hosts from current vCenter Server 5.5, and remember this does not affect running VMs on the host, are you standard switches ?

otherwise you will not be able to do a live migration but a cold migration if no EVC enabled.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
65tdRetiredCommented:
VMWare has many helpful documents such as :  https://kb.vmware.com/s/article/2147686

If I remember correctly the vm's need to be powered off to migrate from 5.5 6.5 ESX hosts.
waltforbesSenior IT SpecialistAuthor Commented:
Thank you both for your contributions
@Andrew Hancock: the advice regarding migrating ESXi 5.5 hosts into the vSphere 6.5 cluster (AND using EVC) was exactly the missing piece of the puzzle for my scenario. That right there resolved it for me.

@65td: thank you for the link - it's a super resource for so many scenarios; I will most likely use it while preparing for VCP.
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

waltforbesSenior IT SpecialistAuthor Commented:
Oh, by the way - Andrew Hancock: I am using standard vSwitches only. Why did you ask?

Many thanks to you both, once again.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Oh, by the way - Andrew Hancock: I am using standard vSwitches only. Why did you ask?

because it's more complicated if your not using Standard Switches, e.g. you are using Distributed!
waltforbesSenior IT SpecialistAuthor Commented:
Understood and agreed. Thank you for responding, although the case is closed. You rock! :-)
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
no problems!
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
VMware

From novice to tech pro — start learning today.