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Draytek VigorSwitch P1280 Manual

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VigorSwitch P1280 User’s Guide
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IP multicast is a technique for one-to-many communication over an IP infrastructure in a
network.
To avoid the incoming data broadcasting to all GE ports, multicast is useful to transfer the
data/message to specified GE ports for IGMP snooping. When VigorSwitch receives a message
“subscribed” by the client, it must decide to transfer the data to specified GE ports according
to the location of the client (subscribed member).
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For the multicast packets, this page allows the administrator to choose actions for processing
the unknown muliticast packets and for handling known packets with MAC address, IP address
and VLAN ID.
Available settings are explained as follows:
Item Description
Unknown Multicast
Action
Select an action for switch to handle with unknown multicast
packet.
Drop: Drop the unknown multicast data.
Flood: Flood the unknown multicast data.
Forward to Router port: Forward the unknown multicast data
to router port.
IPv4 Forward Method Set the IPv4 multicast forward method.
Dst. MAC & VID: Forward using destination multicast MAC
address and VLAN IDs.
Dst. IP & VID: Forward using destination multicast IP address
and VLAN ID.
Apply Save the settings or changes to the switch.
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