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7.4.1.1
Extended multicast filtering
If IGMP snooping is active, multicast data streams are also detected for which no
membership reports of possible recipients are registered. For these multicasts, groups are
created dynamically. These multicasts are forwarded to the querier, i.e., the querier port is
entered in the group.
If the switch itself is the querier, these multicasts are blocked.
7.4.2
"General Multicast Configuration" web page
This web page provides global settings for multicast support. Here, IGMP snooping can be
activated and an aging time can be specified for IGMP snooping information.
Figure 7-4
"General Multicast Configuration" web page
IGMP snooping
In IGMP snooping, the switch passively listens in on the IGMP messages that are sent over
the network and dynamically creates the appropriate groups. The groups are not saved and
will be lost during every power down or when the snooping function is switched off.
IGMP snoop aging
IGMP snoop aging is the time period during which membership reports are expected. If this
time passes without new membership reports being received, the associated port is deleted
from the groups.
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