Multiple Registration Protocol#Multiple MAC Registration Protocol .28MMRP.29

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GARP Multicast Registration Protocol ( GMRP ) is a sub protocol of the Generic Attribute Registration Protocol ( GARP ), which deals with the management of multicast connections. GMRP is standardized in IEEE 802.1p and allows Ethernet hosts and switches, the forwarding of multicast messages on the OSI Layer 2 control.

GMRP is a Layer - 2 network protocol, which it treats MAC multicasts. A host logs on to a multicast address or down. Accordingly, the managing Switch appropriate multicasts on to him or not conducting. Thus, the spread of multicasts is contained, what the network load reduces.