RE: [neutron] DVR / IPv6 on provider network instead?

Also, unrelated, but hopefully a quick question...  is the "internal" or "external" label on a network just used for filtering lists, such as for "openstack network list --external"?  or does it change the behavior of anything?

Regarding my second question, I found some information that indicates --external will share the network with all projects. Whereas the --shared option is only used for sharing a network with a specified list of projects using RBAC rules. It also looks like networks marked as external, not internal, can be specified for the --external-gateway network when creating/updating a router. This has some good info too: https://superuser.openstack.org/articles/tenant-networks-vs-provider-network... Eric