Openstack fullstack carbon jobs fails with connectivity tests.
Example log can be found at http://logs.openstack.org/06/498506/3/check/gate-dsvm-networking-odl-fullstack-carbon-snapshot/c1c6e47/console.html#_2017-08-29_22_32_05_260601

http://logs.openstack.org/06/498506/3/check/gate-dsvm-networking-odl-fullstack-carbon-snapshot/c1c6e47/

From ovs-ofctl dump-flows can be found at the line.
table 213 includes the following rules and drop rule of priority 62020 so that table 213 makes all drop.

cookie=0x6900000, duration=308.836s, table=213, n_packets=0, n_bytes=0, priority=0 actions=drop
cookie=0x6900000, duration=308.491s, table=213, n_packets=4, n_bytes=360, priority=62020 actions=drop <<<<<<<<<<<<<<<<<<<<<<<<< dropping packets....
cookie=0x6900001, duration=0.356s, table=213, n_packets=0, n_bytes=0, priority=62015,ct_state=+inv+trk,metadata=0x10000000000/0xfffff0000000000 actions=drop
cookie=0x6900001, duration=0.011s, table=213, n_packets=0, n_bytes=0, priority=62015,ct_state=+inv+trk,metadata=0x20000000000/0xfffff0000000000 actions=drop
cookie=0x6900000, duration=0.348s, table=213, n_packets=0, n_bytes=0, priority=1012,ct_state=+new+trk,ip,metadata=0x10000000000/0xfffff0000000000 actions=ct(commit,zone=5001),resubmit(,17)
cookie=0x6900000, duration=0.341s, table=213, n_packets=0, n_bytes=0, priority=1013,ct_state=+new+trk,ipv6,metadata=0x10000000000/0xfffff0000000000 actions=ct(commit,zone=5001),resubmit(,17)
cookie=0x6900001, duration=0.362s, table=213, n_packets=0, n_bytes=0, priority=50,ct_state=+new+trk,metadata=0x10000000000/0xfffff0000000000 actions=drop
cookie=0x6900001, duration=0.026s, table=213, n_packets=0, n_bytes=0, priority=50,ct_state=+new+trk,metadata=0x20000000000/0xfffff0000000000 actions=drop