Chapter 5
Setup and Configuration
RUGGEDCOM ROS
User Guide
210 Configuring IGMP
Figure 155: IGMP Parameters Form
1. Mode Options 2. Query Interval Box 3. Router Ports Box 4. Router Forwarding Options 5. RSTP Flooding Options
6. Apply Button 7. Reload Button
3. Configure the following parameter(s) as required:
Parameter Description
Mode Synopsis: { Passive, Active }
Default: Passive
Specifies IGMP mode:
PASSIVE - the switch passively snoops IGMP traffic and never sends IGMP queries
ACTIVE - the switch generates IGMP queries, if no queries from a better candidate for
being the querier are detected for a while.
Query Interval Synopsis: 10 to 3600
Default: 60 s
The time interval between IGMP queries generated by the switch.
NOTE
This parameter also affects the Group Membership Interval (i.e. the group
subscriber aging time), therefore, it takes effect even in PASSIVE mode.
Router Ports Synopsis: Any combination of numbers valid for this parameter
Default: None
This parameter specifies ports that connect to multicast routers. If you do not configure
known router ports, the switch may be able to detect them, however it is advisable to
pre-configure them.
Router Forwarding Synopsis: { Off, On }
Default: On
This parameter specifies whether multicast streams will be always forwarded to
multicast routers.
STP Flooding Synopsis: { Off, On }
Default: Off
This parameter specifies whether multicast streams will be flooded out of all STP non-
edge ports upon topology change detection. Such flooding is desirable, if guaranteed
multicast stream delivery after topology change is most important.
4. Click Apply.
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