So neutron port security offers a lot of great features but it can get in the way of a fully virtualized datacenter.
Thankfully with the port security extension you can control which ports have mac/arp filtering and which don’t.
If you enable port security in ML2 after you install openstack, you will need to update the database for your existing networks or you will have all sorts of provisioning errors and issues with creating ports.
Navigate to your neutron database and then look at “networksecuritybindings”
For this example I will show you what it looks like in phpmyadmin.
As you can see here the database contains the network UUID and a 1/0 for the default option of port security.
Simple insert your network with a default value to fix it.