Virtualized and overlays networks are not a new concept in networking, but have come to the forefront as being a core building block for building virtual networks, software defined networks, service function chaining, and abstracting large-scale virtualization. Many standards have evolved to abstract the underlying network or physical network infrastructure to create virtual networks.  Some of the tunneling techniques such as,  VXLAN, NVGRE, and SST use completely different encapsulation methods to overcome curtain network limitations.  But while each tunneling protocol can be identified in their different approaches they can share some similarities in performance.