Multicast Filtering - Delta DVS-328 series User Manual

3.5 Multicast Filtering

Multicast IP traffic is traffic that is assigned to a host group. Host groups are identified by class D IP addresses,
which range from 224.0.0.0 to 239.255.255.255. A multicast IP packet is only sent by one host to multiple hosts.
Only those hosts that belong to a specific multicast group will receive the multicast. The Internet Group
Management Protocol (IGMP) snooping enables the switch to forward multicast traffic intelligently to only the
interface that requests the multicast traffic. So the network resource is not wasted too much.
If there is a network without the multicast filtering, and a host needs to send data to many hosts, then it needs
to produce several copies in the network. It wastes too much network bandwidth. If there is a network with the
multicast filtering, then it reduces the load of resources (ex. a server) and makes the network bandwidth
efficient. The figures below show the difference between the network without Multicast Filtering and the network
with Multicast Filtering.
IMPORTANT:
Make sure that you save the configuration in the Save Configuration
page after you have applied the configuration changes. (Save
ConfigSave Configuration) If you do not save the configuration,
then the configuration will be cleared after the switch is rebooted.
Network without Multicast Filtering:
(All hosts receive the multicast traffic.)
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