The four items listed wont cause/fix the issue you explained. Fast SSID should be enabled if user switches between different SSID often and wlc anchors don't broadcast SSIDs the foregien controller does so that setting is correct.
What does the Prim...
That's because VPC is a Nexus feature only, I would use MST or use this documentation for their recommendations. https://supportforums.cisco.com/document/62286/dell-cisco-stp-interoperability-and-recommendations-v20pdf
Hope that helps!
I'm going to assume your Cisco router is strictly layer 3 because this could easily be setup using SVIs and trunk ports. If that's the case you will need a another switch that both switches can plug into so that they can share the one link to the rou...
Doesn't appear to be configurable from GUI along with many other advance settings, I would just use the cli for mcs settings.
http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-2/b_Mobility_Express_Deployment_guide/b_Mobility_Expre...