Dell PowerEdge M420 Dell PowerConnect M8024-k User's Configuration Guide - Page 81

Multicast VLAN Registration NOTE: MVR is not supported on the PowerConnect M6220. The Multicast VLAN Registration (MVR) protocol, like IGMP Snooping, allows a Layer 2 switch to listen to IGMP frames and forward the multicast traffic only to the receivers that request it. Unlike IGMP Snooping, MVR allows the switch to listen across different VLANs. MVR uses a dedicated VLAN, which is called the multicast VLAN, to forward multicast traffic over the Layer 2 network to the various VLANs that have multicast receivers as members. Layer 3 Multicast Features For information about configuring L3 multicast features, see "Managing IPv4 and IPv6 Multicast" on page 1149. Distance Vector Multicast Routing Protocol Distance Vector Multicast Routing Protocol (DVMRP) exchanges probe packets with all DVMRP-enabled routers, establishing two way neighboring relationships and building a neighbor table. It exchanges report packets and creates a unicast topology table, which is used to build the multicast routing table. This multicast route table is then used to route the multicast packets. Internet Group Management Protocol The Internet Group Management Protocol (IGMP) is used by IPv4 systems (hosts and routers) to report their IP multicast group memberships to any neighboring multicast routers. PowerConnect M6220, M6348, M8024, and M8024-k switches perform the "multicast router part" of the IGMP protocol, which means it collects the membership information needed by the active multicast router. IGMP Proxy The IGMP Proxy feature allows the switch to act as a proxy for hosts by sending IGMP host messages on behalf of the hosts that the switch discovered through standard IGMP router interfaces. Switch Features 81