I wanted to bring this to the attention of anybody who may have missed it on openstack-dev. Particularly the LDT team folks who have been talking about the routed networks/disparate L2 domains stuff [1] [2]. http://lists.openstack.org/pipermail/openstack-dev/2015-July/thread.html#70 028 This is a discussion stemming from Carl’s segmented, routed networks spec [3]. I think the “ask” from operators has been somewhat well represented, but if others could review and chime in as appropriate, I think that could be useful. Also somewhat related is this patch [4] for better scheduling DHCP agents on the appropriate L2 segment. Might be worth a +1 if it would be useful to you as an operator. [1] https://bugs.launchpad.net/neutron/+bug/1458890 [2] https://etherpad.openstack.org/p/Network_Segmentation_Usecases [3] https://review.openstack.org/#/c/196812/ [4] https://review.openstack.org/#/c/205631/