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If you enable the trunk group at the BS side to transmit several VLAN-flows to several directions, then at the CPE side, you should use the "In-Trunk" option to specify the group number of the trunk group that includes the required switching group.
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Trunk During data transmission through a wired switch, the group number is automatically converted to the 802.1q VLAN tag, and vice versa, when a packet is received through the wired switch, the VLAN tag is converted to the corresponding group number.
Trunk groups may also be used to solve the task of connecting several VLAN segments.
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Special rules on interfaces allow flexible manipulations with VLAN ID tags: deleting, assigning and re-assigning (please consult the information provided in WANFleX OS User Manual).
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In this section you can set the IGMP-parameters for the groups for which support of IGMP snooping is enabled (the IGMP check box is marked for these groups in the "MAC Switch" section).
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IGMP Snooping is a multicast constraining mechanism that runs on Layer 2 devices to manage and control multicast groups. By listening to and analyzing IGMP messages, the device running IGMP Snooping establishes mappings between ports and multicast MAC addresses and forwards multicast data based on these mappings.
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