I'm running 12.2 (52) and (53) on many of my 3560 switches. I am testing 802.1x Authentication. I have it working but i'm also wanting to get the Guest-VLAN working. I enable the global command "dot1x guest-vlan supplicant" but when i go to Interface mode and try to run "dot1x guest-vlan" there isn't an option for guest vlan. Any ideas?