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This should not cause any issues, how long have you left it, waiting for a re-connect?<br />
<br />
it should re-connect automatically?<br />
<br />
and clearly, if you manual connect, it can re-connect, because it's prompting.
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This should not cause any issues, how long have you left it, waiting for a re-connect?

it should re-connect automatically?

and clearly, if you manual connect, it can re-connect, because it's prompting.

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I rebooted the Vcenter server about 10 mins ago.<br />
It's waiting about 5 mins now.<br />
I dont know why it didnt reconnect automatically.
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I rebooted the Vcenter server about 10 mins ago.
It's waiting about 5 mins now.
I dont know why it didnt reconnect automatically.

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I reconnected, which worked ok, then the just disconnected again.
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I reconnected, which worked ok, then the just disconnected again.

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staying reconnected now after trying again
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staying reconnected now after trying again

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No problems, key it under observation.
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I rebooted the vCenter server on out network (it runs on as a virtual machine on one of the hosts). When it restarted it has lost connection to the hosts.<br />
<br />
When I try to reconnect by right cicking on the host and choosing 'reconnect' I get the below msg. &nbsp;Is this any problem? &nbsp;I have not made any changes to the hosts while the vCenter server was rebooting.<a href="https://filedb.experts-exchange.com/incoming/2013/11_w47/688893/esxconnect.png" target="_blank" title="ESXerror (5 KB)"><img alt="ESXerror" class="file-block lazyload" style="max-width: 388px;" data-src="https://filedb.experts-exchange.com/incoming/2013/11_w47/688893/esxconnect.png" /></a>
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esxconnect.png

I rebooted the vCenter server on out network (it runs on as a virtual machine on one of the hosts). When it restarted it has lost connection to the hosts.

When I try to reconnect by right cicking on the host and choosing 'reconnect' I get the below msg.  Is this any problem?  I have not made any changes to the hosts while the vCenter server was rebooting.

ESX vCerter reboot loses connection with hosts (vmware 5.1)

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.

VMware

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.