I’ve been noticing, when using Netvirt, that the Openflow connectivity to the ‘private’ network created by devstack is typically (always?) not set up completely.
As a result, VMs instantiated on the ‘private’ network don’t get IP addresses. Usually, I can get in on the VMs console and assign the IP and then the VM will work (i.e. communicate with other VMs that have been fixed).
If a new tenant network is created, things are fine.