I try to figure out how to configure OTV with ASR "on a stick" with only one OTV edge device per site; the WAN link is a routed port on the cores of each DC.
Up to know I understand the following
1 - One link to core\aggregation with L2 Vlan
2 - One L3 link to core (PTP to core /30) for the join interface
3 - There should be reachability between the addresses at point "2" before implementing the OTV
One question now arises: if I'm going to deploy the OTV in multicast mode shall I have to enable the SSM on the core devices ?
the OTV devices are directly attached on the WAN, which is a little bit different than my design.