Hey large-scalers, We had a discusion in my company (OVH) about neutron drivers. We are using a custom driver based on BGP for public networking, and another custom driver for private networking (based on vlan). Benefits from this are obvious: - we maintain the code - we do what we want, not more, not less - it fits perfectly to the network layer our company is using - we have full control of the networking stack But it also have some downsides: - we have to maintain the code... (rebasing, etc.) - we introduce bugs that are not upstream (more code, more bugs) - a change in code is taking longer, we have few people working on this (compared to a community based) - this is not upstream (so not opensource) - we are not sharing (bad) So, we were wondering which drivers are used upstream in large scale environment (not sure a vlan driver can be used with more than 500 hypervisors / I dont know about vxlan or any other solution). Is there anyone willing to share this info? Thanks in advance!