I have two hosts on my environment , clustered. From web client (using Vsphere 5.5) I choose from one host -->Manage-->Virtual Switches , but all the options are grayed out (Add Host Networking, Refresh the Hosts Network System, Manage the physical network adapters, etc). I go to the other Host and choose same thing and those options are available. I don't know why this is happening?? I googled around but didn't find anything helpful.
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