Feature Request: Add VXLAN backend for efficient kernel-based overlay

Feature Request: Add VXLAN backend for efficient kernel-based overlay: a task in LegoFlow-SWE (Harbor dataset). Problem Currently flannel only supports a UDP-based userspace tunnel backend. The UDP backend moves encapsulated packets through a TUN device and performs packet switching in userspace…

The task

**Problem** Currently flannel only supports a UDP-based userspace tunnel backend. The UDP backend moves encapsulated packets through a TUN device and performs packet switching in userspace, which introduces significant overhead and reduces throughput. We need a more efficient data path that leverages the in-kernel…

Part of Lego-X/LegoFlow-SWE.