Hirschmann RS20 Reference Manual page 119

Switching
Settings per Port (Table)

With this configuration table you can enter port-related IGMP settings.
Parameters Meaning
Port Module and port numbers to which this
entry applies.
IGMP enabled Switch IGMP on/off for each port.
Switching IGMP off at a port prevents
registration for this port.
Prerequisite: The IGMP Snooping
function is activated globally.
IGMP Forward All Switch the IGMP Snooping function
Forward All on/off.
With the IGMP Forward All setting,
the device sends to this port all data
packets with a Multicast address in the
destination address field.
Prerequisite: The IGMP Snooping
function is activated globally.
Note: If a number of routers are
connected to a subnetwork, you must
use IGMP version 1 so that all the
routers receive all the IGMP reports.
Note: If you use IGMP version 1 in a
subnetwork, then you must also use
IGMP version 1 in the entire network.
IGMP Automatic Displays which ports the device has
Query Port learned as query ports if automatic is
selected in "Static Query Port".
Prerequisite: The IGMP snooping
function is activated globally.
Table 71: Settings per port
RM GUI L2E
Release 8.0 05/2013
4.4 Multicasts
Possible values Default setting
- -
On On
Off
On Off
Off
-
yes, no
119