Both machine report: # ps ax | grep docker 837 ? Sl 0:00 /usr/bin/docker -d -b=none # Node 1 root@node-1:~# ip a s 1: lo: mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 04:01:10:10:5d:01 brd ff:ff:ff:ff:ff:ff inet 95.85.54.71/24 brd 95.85.54.255 scope global eth0 inet6 fe80::601:10ff:fe10:5d01/64 scope link valid_lft forever preferred_lft forever 3: lxcbr0: mtu 1500 qdisc noqueue state UNKNOWN link/ether da:e5:e3:9c:9e:3e brd ff:ff:ff:ff:ff:ff inet 10.0.3.1/24 brd 10.0.3.255 scope global lxcbr0 inet6 fe80::d8e5:e3ff:fe9c:9e3e/64 scope link valid_lft forever preferred_lft forever 17: docker0: mtu 1500 qdisc noqueue state DOWN link/ether ca:89:a2:3d:6c:47 brd ff:ff:ff:ff:ff:ff inet 172.16.42.1/24 scope global docker0 inet6 fe80::4cea:2ff:fedc:c57a/64 scope link valid_lft forever preferred_lft forever 18: br0: mtu 1500 qdisc noop master docker0 state DOWN link/ether ca:89:a2:3d:6c:47 brd ff:ff:ff:ff:ff:ff root@node-1:~# ip r s default via 95.85.54.1 dev eth0 10.0.3.0/24 dev lxcbr0 proto kernel scope link src 10.0.3.1 95.85.54.0/24 dev eth0 proto kernel scope link src 95.85.54.71 172.16.42.0/24 dev docker0 proto kernel scope link src 172.16.42.1 root@node-1:~# brctl show bridge name bridge id STP enabled interfaces docker0 8000.ca89a23d6c47 no br0 lxcbr0 8000.000000000000 no root@node-1:~# ovs-vsctl show 1510f4dc-8b5a-48f8-97ce-a2e233a70c0d Bridge "br0" Port "gre0" Interface "gre0" type: gre options: {remote_ip="188.226.138.185"} Port "br0" Interface "br0" type: internal ovs_version: "1.9.0" root@node-1:~# ping 188.226.138.185 PING 188.226.138.185 (188.226.138.185) 56(84) bytes of data. 64 bytes from 188.226.138.185: icmp_req=1 ttl=63 time=0.426 ms 64 bytes from 188.226.138.185: icmp_req=2 ttl=63 time=0.440 ms ^C --- 188.226.138.185 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 999ms rtt min/avg/max/mdev = 0.426/0.433/0.440/0.007 ms root@node-1:~# ping 172.16.42.2 PING 172.16.42.2 (172.16.42.2) 56(84) bytes of data. From 172.16.42.1 icmp_seq=1 Destination Host Unreachable From 172.16.42.1 icmp_seq=2 Destination Host Unreachable From 172.16.42.1 icmp_seq=3 Destination Host Unreachable ^C --- 172.16.42.2 ping statistics --- 4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3014ms pipe 3 # Node 2 root@node-2:~# ip a s 1: lo: mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 04:01:10:10:f0:01 brd ff:ff:ff:ff:ff:ff inet 188.226.138.185/24 brd 188.226.138.255 scope global eth0 inet6 fe80::601:10ff:fe10:f001/64 scope link valid_lft forever preferred_lft forever 3: lxcbr0: mtu 1500 qdisc noqueue state UNKNOWN link/ether 2e:1a:a6:13:53:77 brd ff:ff:ff:ff:ff:ff inet 10.0.3.1/24 brd 10.0.3.255 scope global lxcbr0 inet6 fe80::2c1a:a6ff:fe13:5377/64 scope link valid_lft forever preferred_lft forever 17: docker0: mtu 1500 qdisc noqueue state DOWN link/ether 42:d5:ad:4b:82:40 brd ff:ff:ff:ff:ff:ff inet 172.16.42.2/24 scope global docker0 inet6 fe80::58c1:35ff:feb5:5ec8/64 scope link valid_lft forever preferred_lft forever 18: br0: mtu 1500 qdisc noop master docker0 state DOWN link/ether 42:d5:ad:4b:82:40 brd ff:ff:ff:ff:ff:ff root@node-2:~# ip r s default via 188.226.138.1 dev eth0 10.0.3.0/24 dev lxcbr0 proto kernel scope link src 10.0.3.1 172.16.42.0/24 dev docker0 proto kernel scope link src 172.16.42.2 188.226.138.0/24 dev eth0 proto kernel scope link src 188.226.138.185 root@node-2:~# brctl show bridge name bridge id STP enabled interfaces docker0 8000.42d5ad4b8240 no br0 lxcbr0 8000.000000000000 no root@node-2:~# ovs-vsctl show 7635f0dd-d245-430c-9dbf-02dba456cc88 Bridge "br0" Port "br0" Interface "br0" type: internal Port "gre0" Interface "gre0" type: gre options: {remote_ip="95.85.54.71"} ovs_version: "1.9.0" root@node-2:~# ping 95.85.54.71 PING 95.85.54.71 (95.85.54.71) 56(84) bytes of data. 64 bytes from 95.85.54.71: icmp_req=1 ttl=63 time=0.460 ms ^C --- 95.85.54.71 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.460/0.460/0.460/0.000 ms root@node-2:~# ping 172.16.42.1 PING 172.16.42.1 (172.16.42.1) 56(84) bytes of data. From 172.16.42.2 icmp_seq=1 Destination Host Unreachable From 172.16.42.2 icmp_seq=2 Destination Host Unreachable From 172.16.42.2 icmp_seq=3 Destination Host Unreachable ^C --- 172.16.42.1 ping statistics --- 4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3014ms pipe 3