The multicast routing protocols supported by the vRouter are IGMP, Multicast Listener Discovery (MLD), and Protocol Independent Multicast (PIM).

• IGMP controls multicast communication between hosts and multicast routers on IPv4 networks, allowing hosts to manage membership of multicast groups. MLD performs this function on IPv6 networks.
• PIM controls multicast communication between multicast routers, so that they can track packet distribution.