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The packets will be discarded by the IGMP Snooping if the user transmits mul-
ticast packets to the multicast group that had not been built up in advance.
4.7.1
IGMP Snooping Status
IGMP is used to snoop the status of IP multicast groups and display its asso-
ciated information in both tagged VLAN and non-tagged VLAN networks.
Enabling IGMP with either passive or active mode, you can monitor the IGMP
snooping information, which contains the multicast member list with the mul-
ticast groups, VID and member port.
Parameter:
IGMP snooping mode selection: The switch supports three kinds of
IGMP Snooping status, including "Passive", "Active" and "Disable".
Disable: Set "Disable" mode to disable IGMP Snooping function.
Default: Disable
Active: In Active mode, IGMP snooping switch will periodically issue
the Membership Query message to all hosts attached to it and gather
the Membership report message to update the database of the Mul-
ticast table. By the way, this also reduces the unnecessary multicast
traffic.
Passive: In Passive Snooping mode, the IGMP snooping will not peri-
odically poll the hosts in the groups. The switch will send a Member-
ship Query message to all hosts only when it has received a
Membership Query message from a router.
IP Address: how all multicast groups IP addresses that are registered
on this device.
LANCOM ES-2126+ and LANCOM ES-2126P+
Chapter 4: Operation of Web- based Management
61
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