You can deploy an NSX-T Edge on a host that is prepared for NSX-V, and configure it as a bridge to extend a Layer 2 network between both network environments.
This approach allows the Edge bridge to take advantage of decapsulation of VXLAN frames that happens on the NSX-V prepared host. The bridge performs only GENEVE encapsulation. This bridging approach requires an NSX-T Edge in a virtual machine form factor.