Description Of Gmrp - Hirschmann RS20 User Manual

Network load control 7.2 Multicast application

7.2.4 Description of GMRP

The GARP Multicast Registration Protocol (GMRP) describes the distribu-
tionof data packets with a Multicast address as the destination address on
layer 2.
Devices that want to receive data packets with a Multicast address as the
use the GMRP to perform the registration of the Multicast address. For a
Switch, registration involves entering the Multicast address in the . When a
Multicast address is entered in the filter table, the Switch sends this informa-
tion in a GMRP packet to all the ports. Thus the connected Switches know
that they have to forward this Multicast address to this Switch. The GMRP en-
ables packets with a Multicast address in the destination address field to be
sent to the ports entered. The other ports are not affected by these packets.
Data packets with unregistered Multicast addresses are sent to all ports by
the Switch.
Basic setting: "Global setting": disabled
Basic Configuration L2P
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Release 4.2 07/08