MA Lighting grandMA2 User Manual - page 1328
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Version 3.3
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IGMP Querier
Important:
IGMP snooping requires at least one switch in a group (VLAN) to act as a querier to ensure IGMP
snooping functionality.
Querier register the multicast packets to the corresponding ports.
If more than one querier is activated per group, the switch with the lowest IP address will be elected as querier.
This election process is automated.
IGMP querier is disabled by default.
Unknown Flooding
Unknown flooding is for multicasted frames destined for an address for which the switch has not seen a join.
In that case the switch uses the flooding mask to forward that frame to every port.
Unknown flooding can be global enabled or disabled for all groups.
By default, unknown flooding is enabled.
Yes = All unknown packages will be forwarded
No = All unknown packages will be dropped
Hint:
To forward only known multicast network packets, enable IGMP Snooping and IGMP Querier. Disable
unknown flooding.
VLAN ID
All groups of the switch have a default VLAN ID, except Trunk.
If you implement the switch in an existing network, it can be necessary to change the VLAN ID of the groups.
You can change the VLAN ID of group 1 through group 6. The VLAN ID of group 8 (= manage group) is 1 and fixed.
Possible VLAN IDs are from 1 to 4094.
Group
Default VLAN ID
1
100
2
200
3
300
4
400
5
500
6
600
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