Switching
RM Web L3P
Release
4.1
03/08
5.4
Multicasts
79
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 rout-
ing protocols.
5.4.5 Known Multicasts
In this frame you can determine how the device in IGMP mode sends packets
with known MAC/IP Multicast addresses that were learned through IGMP
Snooping.
X "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.
This standard setting sends all Multicasts to all query ports and to regis-
tered ports. The advantage of this is that it works in most applications
without any additional configuration.
Application: "Flood and Prune" routing in PIM-DM.
X "Send to registered ports".
The device sends the packets with a known MAC/IP Multicast address to
registered ports.
The advantage of this setting, which deviates from the standard, is that it
uses the available bandwidth optimally through direct distribution. It re-
quires additional port settings.
Application: Routing protocol PIM-SM.
5.4.6 Settings per port (table)
X IMGP on per port
This table column enables you to enable/disable the IGMP for each port
when the global IGMP Snooping is enabled. Disabling the IGMP at a port
prevents registration for this port.
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