We have been dealing with an issue and Microsoft support has been useless. Three host servers are in a cluster. We are running Windows Server 2012 Datacenter. In the virtual machine manager, two of the hosts cannot communicate with the agents correctly. All machines on those hosts have the following error: "Host Not Responding". At first, we could temporarily fix the issue with a reboot of the host server. After working with Microsoft support, that doesn't even work anymore.
This basically renders the cluster useless because two of the hosts cannot manage the virtual machines. One of the host servers works fine. All agents can communicate with it and we have full admin controls.
We have tried many things with no success. Any suggestions would be appreciated. We attached screenshots of the issue.