Virtual Extensible LAN (VXLAN) is a networking technology that encapsulates MAC-based layer 2 ethernet frames within layer 3 UDP packets to aggregate and tunnel multiple layer 2 networks across a layer 3 infrastructure. VXLAN scales up to 16 million logical networks and supports layer 2 adjacency across IP networks. Multicast transmission architecture is used for broadcast, multicast, and unknown unicast traffic.

For a list of VXLAN feature support in a specific eos release, consult the appropriate release notes here: https://www.arista.com/en/support/software-download.