How to re-connect hosts

[Carlos Reategui]

After the update from 4.1.1 to 4.2, both my XenServer 6.0.2 hosts show a
state of "Disconnected".  How do I re-connect them? The only 3 options I
see in the UI are: "Dedicate Host", "Enable Maintenance Mode" and "Remove
Host".

thanks,
Carlos