Interlogix GE-DS-242-PoE - Manual (Page 104)

Chapter 4: Web-Based Management
100 GE-DS-242-PoE Managed Ethernet Switch User Manual
Figure 4-54: IGMP State Transitions
IGMP Querier
A router, or multicast-enabled switch, can periodically ask their hosts if they want
to receive multicast traffic. If there is more than one router/switch on the LAN
performing IP multicasting, one of these devices is elected "querier" and
assumes the role of querying the LAN for group members. It then propagates the
service requests on to any upstream-multicast switch/router to ensure that it will
continue to receive the multicast service.
NOTE: Multicast routers use this information, along with a multicast routing
protocol such as DVMRP or PIM, to support IP multicasting across the Internet.
IGMP Configuration
The Switch support IP multicast, you can enable IGMP protocol on web
management's switch setting advanced page, then the IGMP snooping
information displays. IP multicast addresses range are from 224.0.0.0 through
239.255.255.255.