Hirschmann RS20 User Manual page 120

Network Load Control
IGMP Settings
"Current querier IP address" shows you the IP address of the device
that has the query function.
In "Max. Response Time" you specify the period within which the
Multicast group members respond to a query (valid values: 1-3,598 s,
default setting: 10 s).
Note the connection between the parameters Max. Response Time,
Send Interval and Group Membership Interval
"Parameter Values").
The Multicast group members select a random value within the
maximum response time for their response, to prevent all the Multicast
group members responding 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: 3-3,600 s, default setting:
260 s).
Note the connection between the parameters Max. Response Time,
Send Interval and Group Membership Interval
"Parameter Values").
Parameter Values

The parameters
– Max. Response Time,
– Transmit Interval and
– Group Membership Interval
have a relationship to one another:
Max. Response Time < Transmit Interval < Group Membership
Interval.
If you enter values that contradict this relationship, the device then
replaces these values with a default value or with the last valid values.
120
8.2 Multicast Application
(see on page 120
(see on page 120
UM BasicConfig L2E
Release 8.0 05/2013