Hello, As the cross pod L2 networking is in review, and after some discussion with guy working in L2GW project, I think we don't need to support DCI SDN Controller for cross pod L2 networking, L2GW will be good to provide different networking options. Therefore the design doc https://docs.google.com/document/d/18kZZ1snMOCD9IQvUKI5NVDzSASpw-QKj7l2zNqMEd3g/edit was update, and will update according to the discussion in the review https://review.openstack.org/#/c/304540/. The description in the design doc is more general, but need to be accurate too as the guide. You can also review and give comment on the design doc update. Best Regards Chaoyi Huang ( joehuang )