Hi, Over the past few weeks I've experimented with neutron in search of an "ah-ha!" moment at which point I've discovered how to best to use OpenStack neutron to implement a large datacenter CLOS network that supports bi-directional traffic between tenants and the external network(s). While the exploration has been quite educational (and fun), I'm still not there, and looking for suggested compass heading(s) towards best practice(s) as of 2019. Back in 2015, a blog post http://www.dorm.org/blog/openstack-architecture-at-go-daddy-part-2-neutron/ suggests a certain amount of heavy lifing was needed to support GoDaddy's leaf-spine, but I'm hoping by now things might be supported a bit more "out of the box". If not, what is best approach, and what is missing that needs contribution in order to make it complete? TIA and Best, syd