Learning OpenStack Networking - Third Edition
https://github.com/PacktPublishing/Learning-OpenStack-Networking-Third-Edition
https://docs.openstack.org/mitaka/networking-guide/
https://docs.openstack.org/neutron/rocky/admin/intro-os-networking.html

Есть и другая литуратура, например
OpenStack-Cloud-Computing-Cookbook-Fourth-Edition
https://github.com/PacktPublishing/OpenStack-Cloud-Computing-Cookbook-Fourth-Edition