HI all! I use RHEL 7 and Libery. Faced with the following problem - there is no traffic in tunnels and with strange rules:

# ovs-ofctl dump-flows br-tun 
NXST_FLOW reply (xid=0x4):
 cookie=0x886283bb69f40f1a, duration=2442.899s, table=0, n_packets=27, n_bytes=2154, idle_age=2430, priority=1,in_port=1 actions=resubmit(,2)
 cookie=0x886283bb69f40f1a, duration=2442.378s, table=0, n_packets=0, n_bytes=0, idle_age=2442, priority=1,in_port=2 actions=resubmit(,4)
 cookie=0x886283bb69f40f1a, duration=2442.261s, table=0, n_packets=0, n_bytes=0, idle_age=2442, priority=1,in_port=5 actions=resubmit(,3)
 cookie=0x886283bb69f40f1a, duration=2442.248s, table=0, n_packets=0, n_bytes=0, idle_age=2442, priority=1,in_port=6 actions=resubmit(,3)
 cookie=0x886283bb69f40f1a, duration=2442.234s, table=0, n_packets=0, n_bytes=0, idle_age=2442, priority=1,in_port=7 actions=resubmit(,3)
 cookie=0x886283bb69f40f1a, duration=2417.158s, table=0, n_packets=0, n_bytes=0, idle_age=2417, priority=1,in_port=3 actions=resubmit(,4)
 cookie=0x886283bb69f40f1a, duration=2417.010s, table=0, n_packets=0, n_bytes=0, idle_age=2417, priority=1,in_port=8 actions=resubmit(,3)
 cookie=0x886283bb69f40f1a, duration=2397.312s, table=0, n_packets=0, n_bytes=0, idle_age=2397, priority=1,in_port=4 actions=resubmit(,4)
 cookie=0x886283bb69f40f1a, duration=2397.162s, table=0, n_packets=0, n_bytes=0, idle_age=2397, priority=1,in_port=9 actions=resubmit(,3)
 cookie=0x886283bb69f40f1a, duration=2442.899s, table=0, n_packets=0, n_bytes=0, idle_age=2442, priority=0 actions=drop
 cookie=0x886283bb69f40f1a, duration=2442.898s, table=2, n_packets=0, n_bytes=0, idle_age=2442, priority=0,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,20)
 cookie=0x886283bb69f40f1a, duration=2442.898s, table=2, n_packets=27, n_bytes=2154, idle_age=2430, priority=0,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,22)
 cookie=0x886283bb69f40f1a, duration=2442.898s, table=3, n_packets=0, n_bytes=0, idle_age=2442, priority=0 actions=drop
 cookie=0x886283bb69f40f1a, duration=2442.898s, table=4, n_packets=0, n_bytes=0, idle_age=2442, priority=0 actions=drop
 cookie=0x886283bb69f40f1a, duration=2442.897s, table=6, n_packets=0, n_bytes=0, idle_age=2442, priority=0 actions=drop
 cookie=0x886283bb69f40f1a, duration=2442.897s, table=10, n_packets=0, n_bytes=0, idle_age=2442, priority=1 actions=learn(table=20,hard_timeout=300,priority=1,cookie=0x886283bb69f40f1a,NXM_OF_VLAN_TCI[0..11],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],load:0->NXM_OF_VLAN_TCI[],load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[],output:NXM_OF_IN_PORT[]),output:1
 cookie=0x886283bb69f40f1a, duration=2442.897s, table=20, n_packets=0, n_bytes=0, idle_age=2442, priority=0 actions=resubmit(,22)
 cookie=0x886283bb69f40f1a, duration=2442.798s, table=22, n_packets=27, n_bytes=2154, idle_age=2430, priority=0 actions=drop

All tunnels up:

# ovs-vsctl show
706cd420-35a9-46fc-aa0e-6d02e18e1301
    Bridge br-tun
        fail_mode: secure
        Port "gre-0a000a04"
            Interface "gre-0a000a04"
                type: gre
                options: {df_default="true", in_key=flow, local_ip="10.0.10.5", out_key=flow, remote_ip="10.0.10.4"}
        Port "gre-0a001403"
            Interface "gre-0a001403"
                type: gre
                options: {df_default="true", in_key=flow, local_ip="10.0.10.5", out_key=flow, remote_ip="10.0.20.3"}
        Port "vxlan-0a001401"
            Interface "vxlan-0a001401"
                type: vxlan
                options: {df_default="true", in_key=flow, local_ip="10.0.10.5", out_key=flow, remote_ip="10.0.20.1"}
        Port patch-int
            Interface patch-int
                type: patch ...