We performed a DR test at the weekend which involved shutting down our entire Infrastructure.
Upon trying starting everything back up again we noticed that our DNS had failed to start. The DNS is on our main DC servers, and is not virtualized.
When we then used vSphere to connect to the vCentre server we could see the inventory with all our ESXi Hosts and VM's, but they were all coming up as disconnected.
After much playing around we eventually just added all our 11 ESXi's into the vCentre Servers Host file. We could then communicate with each ESXi and everything was fine.
Eventually we brought the DNS back online and so its resolved.
What i need to find out is if there is a way to keep the vCentre server connected to all the ESXi Hosts even when DNS fails? Without having to edit the host file.
Thanks in advance