Finally got 802.11v working (FULLY) - Few pointers

Hi! I am using 802.11r and would very much like to know more about 802.11v. Would you mind answering couple of short questions?

  1. Do I gain something with 802.11v if I already use 802.11r and have 5GHz AP's only?
  2. If installing hostapd, can hostapd-common be removed?
  3. is hostapd-ct a must if I want to try 802.11v (as far as I can see, there is no such package for Archer C7 v2 target)