General Multicast Configuration" Web - Phoenix Contact FL SWITCH SMN 6TX/2POF-PN User Manual

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7.4.1.1 Extended multicast filtering
If IGMP snooping is active, multicast data streams for which no membership reports of pos-
sible recipients are registered are also detected. 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 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 query
An MMS/MCS with activated query function actively sends queries at the "Query Interval"
and evaluates the received reports. The MMS/MCS only sends IGMP query reports if IGMP
snooping is enabled and only in the management VLAN.
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