Switching
78
5.4
Multicasts
RM Web L3P
Release
4.1
03/08
5.4.3 IGMP settings
“Current querier IP address” shows you the IP address of the router that has
the query function.
In “Response Time” you specify the period within which the Multicast group
members respond to a query (valid values: 1-3598 s, default setting: 10 s).
The Multicast group members select a random value within the response
time for their response, to prevent all the Multicast group members respond-
ing to the query at the same time.
Select a large value if you want to reduce the load on your network and can
accept the resulting longer switching times.
Select a small value if you require short switching times and can accept the
resulting network load.
In “Group Membership Interval” you specify the period for which a dynamic
Multicast group remains entered in the device if it does not receive any report
messages (valid values: 3-3600 s, default setting: 260 s).
5.4.4 Unknown Multicasts
In this frame you can determine how the device in IGMP mode sends packets
with an unknown MAC/IP Multicast address that was not learned through
IGMP Snooping.
X "Send to Query Ports".
The device sends the packets with an unknown MAC/IP Multicast address
to all query ports.
X "Send to All Ports".
The device sends the packets with an unknown MAC/IP Multicast address
to all ports.
X "Discard".
The device discards all packets with an unknown MAC/IP Multicast ad-
dress.
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