Rickard,
I guess I define "work" as I do not lose the connection. With the other vswitch, I can vmkping the vMotion interfaces on each of the three LAGs to each of the three hosts in the cluster. Which means the those LAGs at least are functioning to pass traffic. Whether it would actually load balance is a different question.
Now, I am setting up the LAG on the management interface via the host console and not via vCenter. Docs say to do it via vCenter but I don't want to do anything that I can't undo if I can't get them to talk. With as much trouble as I have been having I guess I am worried I will lose the host.
Stephen