Comment 8 for bug 1432873

So this patch appeared to work at first glance, but it has the unfortunate side effect of breaking the ability to add broadcast entries to the forwarding table:

Command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'bridge', 'fdb', 'replace', '00:00:00:00:00:00', 'dev', 'vxlan-19', 'dst', '172.29.243.252']
Exit code: 2
Stdout: ''
Stderr: 'RTNETLINK answers: Operation not supported\n'

This is repeated for each VTEP.