ARP request from public gateway not answered

Pinging the public gateway from a VM that has a floating IP does not work.

Analysis shows that OVS blocks ARP requests from the public gateway.

From devstack node:

[odl@vpn-6-116 ~]$ arp -a
sw01-dist-6.tlv.redhat.com (10.35.7.254) at 40:b4:f0:c2:24:01 [ether] on eth0
Note the public gateway's mac ^^^

[odl@vpn-6-116 ~]$ sudo ovs-appctl bridge/dump-flows br-int
...
priority=180004,arp,dl_src=40:b4:f0:c2:24:01,arp_op=1,actions=NORMAL
duration=794s, n_packets=0, n_bytes=0, priority=180003,arp,dl_dst=40:b4:f0:c2:24:01,arp_op=2,actions=NORMAL
...

These (^^^) hidden rules prevent the ARP request from being properly responded to.