Routing Protocols - Hirschmann RS20 Reference Manual

Switching
Parameter
Unknown Multicasts
Known Multicasts
Table 33: Known and 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 L2E
Release 6.0 07/2010
Meaning
Send to Query Ports:
The device sends the packets
with an 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.
Send to query and
registered ports:
The device sends the packets
with a known MAC/IP Multicast
address to all query ports and
to registered ports.
The advantage of this is that it
works in most applications
without any additional
configuration.
Application:
"Flood and Prune" routing in
PIM-DM.
Send to registered ports:
The device sends the packets
with a known MAC/IP Multicast
address to registered ports.
The advantage of this setting is
that it uses the available
bandwidth optimally through
direct distribution. It requires
additional port settings.
Application:
Routing protocol PIM-SM.
4.4 Multicasts
Value range Default setting
Send to Query Send to All
Ports, Send to Ports
All Ports,
Discard
Send to query Send to
and registered registered ports
ports, send to
registered
ports
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