Overlay IPv6 routing over VXLAN tunnel using an anycast gateway (direct routing) has been previously supported using the “ipv6 virtual-router” configuration for both the data-plane and EVPN (or CVX) control-plane learning environments. 

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.