I am preparing to upgrade from ESXi 4.1 to ESXi 5 update 1. When I run the Host Agent Pre-upgrade Checker and it scans all 8 of my Host it gets a connection error on each one. It does not give you very much information about the error. But all my Host are up I can ping all them they are on the Network, I can login to them, the VM's on the Host are all working so I am not sure what would be causing the Connection error.
Has anyone ran into this before do you have any ideas where I could look?
thanks