I connected 2 sites.
I saw that on one site tunnel was created as expected, but on the second site tunnel wasn't created.
I saw on transport-zones model that data learned properly:
"dpn-id": 198988252403135,
"ip-address": "10.29.12.198",
"option-of-tunnel": false,
"portname": "tunnel_port",
"weight": 1
},

{ "dpn-id": 225126188370489, "ip-address": "10.29.12.53", "option-of-tunnel": false, "portname": "tunnel_port", "weight": 1 }

,
{
"dpn-id": 48725819298843,
"ip-address": "10.29.14.182",
"option-of-tunnel": false,
"portname": "tunnel_port"

and on itm-state:tunnel-list I saw the tunnel details:
"destination-DPN": 48725819298843,
"source-DPN": 225126188370489,
"transport-type": "odl-interface:tunnel-type-vxlan",
"tunnel-interface-names": [
"tund1634f0df9f"
]
but there wasn't such tunnel on ovs, as you can see the rule of the second vm (from the different site) is drop:
table=51, n_packets=0, n_bytes=0, priority=20,metadata=0x138a000000/0xffff000000,dl_dst=fa:16:3e:77:c9:f8 actions=drop