4.2.3 Virtual Extensible LAN (VXLAN)
Virtual Extensible LAN (hereafter referred as VXLAN) is an IETF submitted protocol that uses an encapsulation mechanism that enables Layer 2 overlay on Layer 3 networks. VXLAN is used to support elastic Virtual Datacenters across different networks.
VXLAN is designed to be deployed as seamlessly as possible on existing networks, with a goal of requiring as few changes on the physical network as possible. VXLAN requires IP multicast to be deployed across the physical network infrastructure by enabling IGMP (v1, v2 and v3) snooping on physical switches and PIM for multicast routing.