Comment 1 for bug 1201471

Mathieu, is this only a problem with the ML2 TypeDriver patches? Because the review you're mentioning here worked just fine every time I functionally tested it. Are you perhaps not setting up your devstack correctly? With this review [1], you have to set up devstack as follows:

Control:
Q_AGENT_EXTRA_AGENT_OPTS=(tunnel_types=vxlan)
Q_AGENT_EXTRA_OVS_OPTS=(tenant_network_type=vxlan)
Q_SRV_EXTRA_OPTS=(tenant_network_type=vxlan tunnel_type=vxlan)

Compute:
Q_AGENT_EXTRA_AGENT_OPTS=(tunnel_types=vxlan)
Q_AGENT_EXTRA_OVS_OPTS=(tenant_network_type=vxlan)

Give that a try and see if it helps. This may only be an issue when running with ML2.

[1] https://review.openstack.org/#/c/33107/21