I have 3 node in openstack (Mikata), everything was working fine in Legacy neutron networking. 1. Controller (network) 2. Compute1 3. Compute2 Today i have migrate it from Legacy to DVR networking to increase performance. I following this document http://egonzalez.org/configure-neutron-dvr-openstack-liberty/ Now i created V-Router and attached External & Private network to it. but when i am tying to add floating IP then in "Port to be available" is empty saying No port available. Does anyone has this issue. what i should look to find issue? any hint? Similar issue some people getting in JUNO but that solution didn't work for me https://ask.openstack.org/en/question/54713/no-ports-available-when-trying-to-associate-a-floating-ip/