Description of problem: We added a port for the VLAN 107 on our cisco UCS system, nothing were configured on RHEL nor NOVA. When we did it all the broadcast traffic where retransmitted among all the VLAN we have. Version-Release number of selected component (if applicable): openstack-nova-network-2014.1.4-14.el7ost.noarch How reproducible: unsure Steps to Reproduce: 1. attach a VLAN port to UCS 2. 3. Actual results: Broadcast traffic from all VLAN forwarded to all VLAN Expected results: dont forward broadcast traffic Additional info: