Moxa PT-7528-20MSC-4TX-4GSFP-HV-HV [70/116] Gmrp garp multicast registration protocol

PT-7528 Series Advanced Settings

allows users to enable IGMP snooping by VLAN ID. Moxa switches support IGMP snooping version 1, version 2

and version 3. Version 2 is compatible with version 1.The default setting is IGMP V1/V2. "

are compatible with any device that conforms to the IGMP v2 and IGMP v3 device

• The IP router (or querier) periodically sends query packets to all end-stations on the LANs or VLANs that are

connected to it. For networks with more than one IP router, the router with the lowest IP address is the

querier. A switch with IP address lower than the IP address of any other IGMP queriers connected to the LAN

or VLAN can become the IGMP querier.

• When an IP host receives a query packet, it sends a report packet back that identifies the multicast group

that the end-station would like to join.

• When the report packet arrives at a port on a switch with IGMP Snooping enabled, the switch knows that the

port should forward traffic for the multicast group, and then proceeds to forward the packet to the router.

• When the router receives the report packet, it registers that the LAN or VLAN requires traffic for the

multicast groups.

Group membership information dynamically. GMRP functions similarly to GVRP, except that GMRP registers

multicast addresses on ports. When a port receives a GMRP-join message, it will register the multicast

address to its database if the multicast address is not registered, and all the multicast packets with that

multicast address are able to be forwarded from this port. When a port receives a GMRP-leave message, it will

will not be able to be forwarded from this port.

Static Multicast MAC

Some devices may only support multicast packets, but not support either IGMP Snooping or GMRP. The Moxa