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.