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First of all, the environment: Â Two ESXi 5.5 hosts that have been running for some time, using the free version of the hypervisor without any VCenter Server software, and have been managed using the VSphere client. Â We just purchased a license for VSphere Essentials 6 and I've installed it on one of our virtual hosts. Â I can open the management tools, either VSphere client or the web console on the server with no problem.
So, my problems:
1. Â I cannot open the web client successfully on my Windows 7 workstation in IE11. Â It keeps asking me to install the client plugin, but when I try to install it again, the client plugin says it's already installed. Â It doesn't show on the list of add-ins in IE. OK, I get it, no one like IE. However, I was able to install the plugin in Firefox, but I get a warning message every time I open it that the version of Firefox (26) that I'm running is too old and I must upgrade to 30. Â Anyway, it seems to open, but I don't know if I'm missing some essential ("Essentials") functions.
2. Â The big problem is with my host licenses. Â I understand that since these were originally installed using the free hypervisor that I have to somehow license these hosts for the VSphere client agent. Â When I try to add a host I get this message: Â "The VMware vSphere 5 Hypervisor license for Host server.domain.org does not include vCenter agent for VMware host. Upgrade the license."
I didn't have this problem the last time I did a similar upgrade, but that was to VSphere Enterprise and it was version 5.5. Regardless of how much searching I do, I can't find the (what I would think would be very simple) instructions on HOW to upgrade the license. Â These hosts were just upgraded to 5.5U2. Â Do I have to upgrade them to 6.0? Â How do I do that if I can't add them to the datacenter I've created in VSphere Essentials? Also, these servers are Proliant ML350 G6's and I don't think they're officially on the list as compatible with ESXi 6.
Any suggestions or instructions would be appreciated.
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Integration Client is only used for Console and/or uploading and downloading files.
Have you tried using Chrome?
2. Add your licenses, to vCenter Server, and then Assign them to the host, when you add the ESXi hosts. The reason you cannot add to vCenter Server, is because it's got a FREE ESXi license attached.
Ah, these our 5.5 U2 hosts, you will need to update them to 6.0, because the licenses you have are 6.0. and as you have to update to 6.0, you might as well, add the licenses, after update as well.
Okay, here is how you update them, lots of articles for you to read:-
lots of my EE Articles, these are step by step, hold you hand style with lots of screenshots and walkthroughs like a video game....
https://www.experts-exchange.com/articles/19219/HOW-TO-Upgrade-VMware-ESXi-5-1-and-ESXi-5-5-to-ESXi-6-0-with-VMware-Update-Manager-VUM.html
https://www.experts-exchange.com/articles/19279/HOW-TO-Update-Patch-VMware-ESXi-6-0-0-GA-to-ESXi-6-0-0b-with-VMware-Update-Manager-VUM.html
(make sure you patch to 6.0.0b!) do not run on 6.0.0 GA!
https://www.experts-exchange.com/articles/19159/HOW-TO-Install-and-Configure-VMware-vSphere-Update-Manager-VUM-6-0.html
https://www.experts-exchange.com/articles/18839/HOW-TO-Upgrade-VMware-ESXi-5-5-to-VMware-ESXi-6-0-using-an-ISO-image.html
https://www.experts-exchange.com/articles/18819/HOW-TO-Upgrade-VMware-ESXi-5-5-to-ESXi-6-0-in-5-easy-steps.html
https://www.experts-exchange.com/articles/18820/HOW-TO-Update-VMware-ESXi-6-0-0-GA-to-ESXi-6-0-0b-in-5-easy-steps.html
https://www.experts-exchange.com/articles/19181/HOW-TO-Add-VMware-vSphere-Hypervisor-ESXi-Hosts-to-VMware-vSphere-vCenter-Server-6-0.html
You have all the articles, and methods of updating to 6.0 from ISO, Offline file, and VUM, and also 6.0.0b.
for your information, when you upgrade 5.5 to 6.0, it automatically goes into Evaluation Mode, and you'll then need to apply a license after 59/60 days.
If you've never used or installed VUM, it's worth the effort to maintain your upgrades/updates!






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I'm not sure if I could do the downgrade thing, although it might be easier. Â I purchased the license from HP not directly from VMWare, because it cost a bit less due to having all HP servers.
you'll be updated to 6.0.0b in no time, and then be able to apply new licenses, and then your all done.
I did find one article online by someone who had successfully installed ESXi 6 on an HP Proliant ML110 G6. Any thoughts on that?

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VMware
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VMware, a software company founded in 1998, was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies. VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture. Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.