It took me quite a while to find an official document where you have the chance to get an overview on whats supported on which platform. This week i got lucky 😉
Multicast Enabled Underlay:
VXLAN L2 and L3 Gateways:
The complete presentation with a lot more of VXLAN informations can be found here:
https://www.cisco.com/c/dam/m/sl_si/events/2016/cisco_dan_inovativnih_resitev/pdf/cisco_day_slovenia_2016_vxlan_marian_klas_final.pdf