Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 159
Multicast
IP multicast is an internet communication method where a single data packet can be transmitted from a sender
and replicated to a set of receivers.
IGMP Snooping
IGMP snooping is a method that network switches use to identify multicast groups, which are groups of
computers or devices that all receive the same network traffic. It enables switches to forward packets to the
correct devices in their network. IGMP snooping lets the switch connect to a router closer to the root of the tree.
This interface is the upstream interface. The router on the upstream interface must be running IGMP.
Basic Configuration
This page provides IGMP Snooping related configuration.
IGMP (Internet Group Management Protocol) is a communications protocol used to manage the membership of
Internet Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast routers to establish multicast
group memberships. It is an integral part of the IP multicast specification, like ICMP for unicast connections. IGMP
can be used for online video and gaming, and allows more efficient use of resources when supporting these uses.
Global Configuration:
Snooping Enabled: Enable the Global IGMP Snooping.
Unregistered IPMCv4 Flooding Enabled: Enable unregistered IPMCv4 traffic flooding. The flooding control
takes effect only when IGMP Snooping is enabled. When IGMP Snooping is disabled, unregistered IPMCv4 traffic
flooding is always active in spite of this setting.
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