Mstp Configuration Information; Igmp Snooping Configuration - Intellinet 561433 User Manual

Gigabit Ethernet PoE+ Web-Managed AV Switch

MSTP CONFIGURATION INFORMATION

The following image shows the MSTP configuration information page, through which you can view some
MSTP related information.

IGMP SNOOPING CONFIGURATION

IGMP SNOOPING CONFIGURATION
The Internet Group Management Protocol (IGMP) lets hosts and routers share information about multicast
group memberships. IGMP Snooping is a switch feature that monitors the exchange of IGMP messages and
copies them to the CPU for future processing. The overall purpose of IGMP Snooping is to limit the forwarding
of multicast frames to only ports that are a member of the multicast group.
Computers and network devices that want to receive multicast transmissions need to inform nearby routers
that they will become members of a multicast group. The Internet Group Management Protocol (IGMP) is used
to communicate this information. IGMP is also used to periodically check the multicast group for members
that are no longer active. In the case where there is more than one multicast router on a sub network, one
router is elected as the "queried." This router then keeps track of the membership of the multicast groups
that have active members. The information received from IGMP is then used to determine if multicast packets
should be forwarded to a given sub network or not. Using IGMP, the router can check to see if there is at least
one member of a multicast group on a given sub network. If there are no members on a sub network, packets
will not be forwarded to that sub network.
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