Kindly explain or share some links to easily understand the communications part of VMWARE VSphere

like communications between VCENTER, HOST, and VM's.
ashokan jayaramanSenior SpecialistAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It's easier to provide this diagram of the communications between vCenter and Hosts.

VMs are installed on the Hosts.

Network Port Diagram - vSphere 5.x - Reference Sheet

Please ask questions
Uni KittyCommented:
To compliment Andy's diagram, these components communicate with each other using agents (services). On ESXi, the hypervisor, the agent is hostd. He controls the start up of all other services related to the hypervisor. If you connect ESXi to vCenter, the vpxa agent on the hypervisor communicates with the vpxd agent on vCenter. The VMs are essentially running processes in memory on the hypervisor.

The vpx agents communicate about things like vm creation and conifguration, cluster configurations, vmotion, etc and pass that information to hostd.
There are a lot of sub-services, but they are all managed by hostd which communicates with the vmKernel.
ashokan jayaramanSenior SpecialistAuthor Commented:
@Melanie Spatola : Can u plz share some diagrams to get clear picture as it is confusing between versions of Vsphere
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
A Diagram has been posted in the first post.

Most version of vSphere are the same.

What versions are your wanting ?

Here is a simple picture, which is the same for all version of vSphere.


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Uni KittyCommented:
Thanks Andy, that's a good diagram of the agent communications.
ashokan jayaramanSenior SpecialistAuthor Commented:
thank u so much for your diagram Andy

Am using Vsphere 5.1 in my environment

Thanks Melanie for your time
ashokan jayaramanSenior SpecialistAuthor Commented:
Simple and easy to understand thank u
ashokan jayaramanSenior SpecialistAuthor Commented:

Am not mark the grade based on answers am so sorry about it. I thought Question is a B grade one so i select that
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