Several customers have expressed interest in using IPv6 addresses for VXLAN underlay in their Data Centers (DC). Prior to 4.24.1F, EOS only supported IPv4 addresses for VXLAN underlay, i.e., VTEPs were reachable via IPv4 addresses only.

Several customers have expressed interest in using IPv6 addresses for VxLAN underlay in their Data Centers (DC). Prior to 4.27.2F, only IPv4 addresses are supported for VxLAN underlay, i.e VTEPs are reachable via IPv4 addresses only. This feature enables a VTEP to send VxLAN Encapsulated packets using IPv6 underlay.

This feature allows an operator to configure a centralized routing topology with an IPv6 VXLAN underlay. This is useful for customers who want to use an anycast (VARP) gateway for routing over an IPv6 control plane. VARP allows multiple switches to simultaneously route packets from a common IP address in an active-active router configuration. Each switch is configured with the virtual IP address and a common virtual MAC address.