Comment 8 for bug 1832526

This RFE was discussed during today's Drivers meeting. It was approved. There was conversation about extending the Availability Zones concept to support this RFE. Per the agreement during the meeting, the next steps are:

1) We will write a PoC and spec to explore how to weave all the pieces that Neutron has already in place (network_availability_zone extension, physnets and bridge mappings, placement driver) together and identify gaps.

2) Since we need to involve the Nova / Placement combo to fully support this RFE, we will make progress in the PoC / spec in time to discuss it in Shanghai in the x-projects session with Nova / Placement

3) mlavalle volunteers to carry out the previous two points