This feature is available when configuring Layer2 EVPN or EVPN IRB.As described in RFC7432 section 15 [1], “MAC Mobility” or “MAC move” occurs when a Customer Edge (CE) moves from one Ethernet segment to another, resulting in two EVPN MAC/IP (Type 2) routes being advertised -- one route with the previous Ethernet segment ID (ESI) and the other with the new Ethernet segment ID. MAC mobility also happens when a CE moves from a single-homed provider edge (PE) to a different PE.