I recently upgraded my VMware licensing to vSphere 5.1 Essentials Plus. With this I was able to utilize HA in a cluster. Since enabling HA, I’ve been getting this error:
Host hostname currently has no management network redundancy
It took me awhile to actually figure out what was wrong, and I couldn’t remember that it actually happened when I added the host to the cluster. Anyway, here is the link to the VMware article that solved my problem. Hopefully this helps someone find the answer faster than I did.