Dell PowerEdge VRTX - Manual (Page 345)

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Guide\Plasma_UGSwitching_Multicast.fm
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14
Multicast
This chapter describes Multicast support on the device.
It contains the following topics:
• Multicast Support Overview
• Global Parameters
• Bridge Multicast Groups
• Bridge Multicast Forward All
• IGMP Snooping
• Unregistered Multicast
• Multicast TV VLAN
• Multicast TV VLAN Mapping
Multicast Support Overview
Multicast forwarding enables a single packet to be forwarded to multiple
destinations. Layer 2 Multicast service is based on a Layer 2 device 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.
There are two types of Multicast groups:
• Registered Multicast Group — When traffic addressed to a registered
Multicast group is received, it is handled according to its entry in the
Multicast Filtering Database and forwarded only to the registered
ports.
• Unregistered Multicast Group — If traffic addressed to an
unregistered Multicast group is received, 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).