Virtual Extensible LAN (VXLAN) Feature Overview and Configuration Guide

VXLAN tunnels carry Ethernet frames over an IP network core. You can join together two or more Layer 2 networks, to form a single Layer 2 broadcast domain, by establishing a full mesh of VXLAN tunnels between them. VXLAN allows you to create a Layer 2 network that spans a wide area without needing to configure a VLAN for it through the network core.