Moxa Technologies EDS-518A Series Multicast Filtering and MOXA EtherDevice Switch, Snooping Mode, Network with multicast filtering, Network without multicast filtering

EDS-518A Series User’s Manual						Featured Functions
Network without multicast filtering
	Group 1 Multicast Stream				Group 2 Multicast Stream
			Serial ports
		Console LAN	1 2 3	4 5 6 7 8 9 10 11 12 13 14 15 16

IGMP Group2 IGMP Group1 IGMP Group2 IGMP Group1

All hosts receive the multicast traffic, even if they don’t need it.Network with multicast filtering

Group 1 Multicast Stream Group 2 Multicast Stream

IGMP Group2 IGMP Group1 IGMP Group2 IGMP Group1

Hosts only receive dedicated traffic from other hosts belonging to the same group.

Multicast Filtering and MOXA EtherDevice Switch

EDS-518A has three ways to achieve multicast filtering: IGMP (Internet Group Management Protocol) Snooping, GMRP (GARP Multicast Registration Protocol), and adding a static multicast MAC manually to filter multicast traffic automatically.

IGMP (Internet Group Management Protocol)Snooping Mode

Snooping Mode allows your switch to forward multicast packets only to the appropriate ports. The switch “snoops” on exchanges between hosts and an IGMP device, such as a router, to find those ports that want to join a multicast group, and then configures its filters accordingly.

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