Unknown Multicasts - Hirschmann RS20 Reference Manual

Switching
Parameter Meaning
IGMP Snooping Activate IGMP Snooping globally for the entire device.
disabled Deactivate IGMP Snooping globally for the entire device.
If IGMP Snooping is switched off, then
Table 10: Global setting

4.3.2 Unknown Multicasts

In this frame you define how the device sends packets with an unknown
MAC/IP Multicast address that was not learned through IGMP Snooping.
Prerequisite: In the Switching:Multicasts:Global Settings dialog,
the IGMP Snooping mode is selected.
Parameter Meaning
Send to Query The device sends the packets with an
Ports unknown MAC/IP Multicast address to
all query ports.
Send to All Ports The device sends the packets with an
unknown MAC/IP Multicast address to
all ports.
Discard The device discards all packets with an
unknown MAC/IP Multicast address.
Table 11: Unknown Multicasts
Note: The way in which unlearned Multicast addresses are handled
also applies to the reserved addresses from the "Local Network Control
Block" (224.0.0.0 - 224.0.0.255). This can have an effect on higher-level
routing protocols.
RM Web L2B
Release 5.0 04/09
the device does not evaluate Query and Report
packets received, and
it sends (floods) received data packets with a Multi-
cast address as the destination address to all ports.
4.3 Multicasts
Default setting
deselected
selected
Value range Default setting
selected/dese- deselected
lected
selected/dese- selected
lected
selected/dese- deselected
lected
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