Linux Bridge supported GRE Tunnels, but not the newer and more scalable VXLAN model https://vincent.bernat.ch/en/blog/2017-vxlan-linux
This post will talk
about the various building blocks available to speed up packet processing
both hardware based e.g.SR-IOV, RDT, QAT, VMDq, VTD
and software based e.g. DPDK, Fd.io/VPP, OVS etc and give
hands on lab experience