vm shows disconnected during a host failure in cluster - vcenter

Hi

we have three host in vcenter in a cluster with HA and DRS.

Tested and verified that during  any host failure the VMs are moved accordingly.

Recently we had an issue where the vcenter located in a different location lost connections to those host and thus the cluster was lost/disconnected but whats more intriguing is that when the connection was established , we discovered that just one host is not responding on the network and later when it did start to respond, we found just one VM on that host is showing disconnected status where as other VMs are up and running on other two hosts.

investigating the logs only shows the sequence of vcenter losing connections to that cluster and hosts one after the other but from the logs of these hosts i cannot drive anything conclusion.

if anyone has seen this happening or have any idea what could have caused it , then please do let me know.
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lomareeAsked:
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TMekeelCommented:
DNS failure?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It's possible you may need to increase your hearbeat time in the vCenter configuration.

If you vCenter Server is located over a different network/WAN from the hosts.
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lomareeAuthor Commented:
Well we have decided to upgrade the vCenter to the most available version.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Personally I would advise against if you have not already done this it can be problematic
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lomareeAuthor Commented:
any specific reason for going against it , like personal experience
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lomareeAuthor Commented:
it turned out to the problem from network side.

Port Channel issues
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Missed last post as for upgrading too many upgrade failures and also check EE questions ref my vCenter broke after upgrade.
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lomareeAuthor Commented:
other solution provided were not the cause of the problem
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