This document discusses multi-hypervisor OpenStack, including what it is, use cases, current state, and challenges. Multi-HV OpenStack allows using multiple hypervisors like KVM and vSphere together. It provides benefits like enabling developer choice, avoiding vendor lock-in, and supporting application needs across hypervisors. Currently the main networking challenge is integrating distributed virtual switches, though the OVS DVS driver is now in development. A demo shows VMs launched on KVM and vSphere communicating over a tenant network using OVS and a VMware distributed virtual switch. Overall progress has been made but more work is needed to support options like Contrail across hypervisors by the next OpenStack summit.