Multiple MAC Registration Protocol (MMRP)
Multiple MAC Registration Protocol is a Data Link Layer (Layer 2) protocol to register group MAC addresses (i.e. multicast) on multiple switches. It is an MRP application, originally defined in IEEE 802.1ak-2007 and subsequently included in 802.1Q. It replaced the 802.1D based GMRP (GARP Multicast Registration Protocol). The purpose of MMRP is to allow multicast traffic in bridged LANs to be confined to areas of the network where it is required.
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