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3-9. Multicast
The function, is used to establish the multicast groups to forward the
multicast packet to the member ports, and, in nature, avoids wasting the bandwidth
while IP multicast packets are running over the network. This is because a switch
that does not support IGMP or IGMP Snooping cannot 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.
3-9-1. IGMP Mode
Function name:
IGMP Mode
Function description:
IGMP mode is used to enable IGMP with either snooping , proxy or disable
mode.
Fig. 3-9-1
Parameter description:
IGMP mode selection:
The switch supports to enable IGMP mode function
Disable: To disable IGMP
Proxy: To set IGMP mode as IGMP Proxy
Snooping: To set IGMP mode as IGMP Snooping
Summary of Contents for FGP-1072
Page 1: ...i FGP 1072 8FE PoE 2GE Combo SFP L2 Managed Switch User Manual Ver 1 00 1206...
Page 32: ...32 Fig 2 15 Office Network Connection Fig 2 14 Peer to peer Network Connection...
Page 45: ...45 Fig 3 5...
Page 133: ...133 Same as mentioned in Port Config Restricted Tcn Same as mentioned in Port Config...
Page 173: ...173 Fig 3 85 Fig 3 86 Fig 3 87...
Page 193: ...193 Managed Switch FGP 1072 Login admin Password FGP 1072 Fig 4 1...
