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DES-3228PA Embedded Web System User Guide
Section 14. Configuring Multicast Forwarding
Multicast forwarding allows a single packet to be forwarded to multiple destinations. L2 Multicast service is based
on L2 switch receiving a single packet addressed to a specific multicast address. Multicast forwarding creates
copies of the packet, and transmits the packets to the relevant ports.
Registered Multicast traffic — If traffic addressed to a registered multicast group is seen it is handled by an entry in
the Multicast Filtering Database and forwarded only to the registered ports.
Unregistered Multicast traffic — If traffic addressed to an unregistered multicast group is seen it is handled by a
special entry in the Multicast Filtering Database. The default setting of this is to flood all such traffic (traffic in
unregistered multicast groups).
The device supports:
<bullet> Forwarding L2 Multicast Packets — Enabled by default, and not configurable by user.
The system supports multicast filtering for multicast groups.
<bullet> Filtering L2 Multicast Packets — Enables forwarding of Layer 2 packets to interfaces. If Multicast filtering
is disabled, Multicast packets are flooded to all relevant ports.
This section contains the following topics:
•
Defining IGMP Snooping
•
Defining Multicast Bridging Groups
•
Defining Multicast Forward All Settings
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