Site VLAN should be in spanning tree forwarding on at least one port in the OTV VDC. If not, the data will not be forwarded across the OTV even though the OTV overlay is up and adjacency is forwarded with other peers.
7. Verify Tunnel Creation
After the OTV adjacency is setup, OTV process creates implicit tunnels for each discovered peer. These tunnels will be used to forward the data across OTV to the respective site.
show otv internal event-history debug
2011 May 21 10:10:58.428388 otv : : otv_tunnel_gre_add Tunnel (10.
10.15.6, 10.10.17.6) does not exist, creating NEW
2011 May 21 10:10:58.426206 otv : : Received ISIS add adjacency me
ssage for (Overlay1, 10.10.17.6) , sid 0026.51ce.0f43
Tunnel process in the NX-OS creates these tunnels based on the request from OTV process. You can verify the implicit tunnels as below:
SITE1-OED1# show tunnel internal implicit otv brief