I have recently added a new Nic to an exisitng ESXi 4.1 host, I used this nic for a new vSwitch and enabled a second management network to provide redundancy. The vSphere enviroment includes 2 ESXi hosts, both hosts have 8 vCPU capacity with 32GB of ram. Prior to the addition of the Nic I was able to cold vMotion all vm's between the hosts but now when I try to vmotion I receive an error "the operation is not allowed in the current connection state of the host". I have restarted the management network on both hosts and I have powered off/on all vm's in the cluster, I have also powered down both hosts and removed/installed them from the cluster. I still get this error message any idea's would be appreciated.
Check this KB: http://kb.vmware.com/kb/1003829
I am now cold vMotion working in the cluster, Thanks