Comment 6 for bug 1846285

Hi,

Thanks for your proposal. This is routed networks taken to it's ultimate extreme, which is really eradicating L2 domains from the deployment and have all the VM's traffic handled at L3. Would this be a fair characterization of your proposal? But is that is the case, why fake complete L3 on top of a Neutron implementation that is geared towards L2? Furthermore, why not use Calico that does everything at L3? Have you thought of the performance implications:

1) For routed networks, the Neutron server maintains a segment - host mapping. The overheaded of maintaining this for a huge number of segments may be very high. Have you measured the impact?

2) Neutron server also updates Nova via placement of the ipv4 inventory available in each segment. This data is useful in scheduling VMs to the correct compute hosts. Again, have you thought of the performance impact? Have you measured it?