NetworkingVPNVLANSysAdminL2 Tunneling Protocols Explained: GRE, L2TP, VXLAN and When to Use EachA practical guide to Layer 2 tunneling — how GRE, L2TP, and VXLAN work, their differences, real configuration examples on Linux and Cisco, and which to use for different network scenarios.June 22, 202611 min read