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Phoenix01b
Contributor
Contributor
‎02-13-2018 01:00 AM

How to solve error cannot contact the specified host in vsphere 6.5

How to solve error cannot contact the specified host in vsphere 6.5

This article does not solve this problem

VMware Knowledge Base

Does VMware Company allow trial users to add host and virtual machines in vsphere 6.5 or only $$$ users can?

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7 Replies
a_p_
Leadership
Leadership
‎02-13-2018 01:43 AM

While in evaluation mode (vCenter as well as ESXi hosts), you have the full feature set of the Enterprise Plus edition.

  • Make sure that Lockdown mode is disabled on the host. You may check on e.g. the ESXi host's console (DCUI).
  • Check whether the FQDN host name is resolvable, i.e. a "Host-A" entry for it exists in your DNS server.
  • Add the host to vCenter with its fully qualified domain name (FQDN), e.g. hostname.domain.local.

André

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Phoenix01b
Contributor
Contributor
‎02-13-2018 01:47 AM

How could I make sure that Lockdown mode is disabled on the host.

How to enable or disable Lockdown mode on vSphere 6.5?

It is strange?

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a_p_
Leadership
Leadership
‎02-13-2018 02:31 AM

I mentioned an option in my previous reply.

Anyway, if you are able to connect to the host using the vSphere Client, then Lockdown mode is disabled.

André

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Phoenix01b
Contributor
Contributor
‎02-13-2018 02:53 AM

How to open DCUI?

I found no results about DCUI on vSphere Search Bar and Windows Search Bar?

Could you please include images for each steps?

I cannot add host to vSphere, so I don't know how to connect to the host?

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Finikiez
Champion
Champion
‎02-13-2018 05:35 AM

DCUI is Direct Console User Interface. It's what you see when you connect monitor to your physical server.

Are you trying to add host by FQDN or IP address?

What is an IP of your vcenter and ESXi host?

Can you ping ESXi host's IP from vcenter server?

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lajato
Contributor
Contributor
‎07-07-2020 03:37 PM

For anyone who is looking for a solution to this problem, tried everything they could find online but without success:

Your vCenter and the host you're trying to add are probably not on the same LAN but connected with a VPN.  Lower the MTU of the tunnel to less then 1320. This will solve the issue.

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