What worked in our case for 9.6 for Windows was a combination of things. First one was to make sure we had the required internal DNS SRV records - _cuplogin and _cisco-uds. Second one was to use the SERVICES_DOMAIN=domain.com switch when installing...
That did the trick - specifically setting the port channel to rate-mode shared. Certainly solved the problem as far as getting all the deisred ports up in the channel, but where I still have a knowledge gap is the operational difference between dedi...
Also interested in whether there was a resolution to this. I'm currently experiencing the same issue trying to get port channels going between a pair of 6120XP FI's and 9509 MDS switches. Some ports will come up in the channel on the MDS side, othe...