System information

SIGNAMAX a.s.
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support IGMP or IGMP Snooping can not tell the multicast packet from the broadcast packet,
so it can only treat them all as the broadcast packet. Without IGMP Snooping, the multicast
packet forwarding function is plain and nothing is different from broadcast packet.
A switch supported IGMP Snooping with the functions of query, report and leave, a
type of packet exchanged between IP Multicast Router/Switch and IP Multicast Host, can
update the information of the Multicast table when a member (port) joins or leaves an IP
Multicast Destination Address. With this function, once a switch receives an IP multicast
packet, it will forward the packet to the members who joined in a specified IP multicast group
before.
The packets will be discarded by the IGMP Snooping if the user transmits multicast
packets to the multicast group that had not been built up in advance.
3-15-1 IGMP Mode
Function name:
IGMP Mode
Function description:
IGMP mode to select the switch to issue IGMP host messages on behalf of hosts that
the system discovered through standard IGMP interfaces. The switch acts as a proxy or
snooping for its hosts.
Fig. 3-162
IGMP Proxy
Parameter description:
Disable:
To disable the IGMP service on the switch.
Proxy :
To select and enable the IGMP mode with a proxy on the switch.
Snooping:
To select and enable the IGMP mode with a snooping on the switch.