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The states a computer will go through to join or to leave a multicast group are shown below:
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.
Multicast routers use this information, along with a multicast routing protocol such as
DVMRP or PIM, to support IP multicasting across the Internet.
4.3.5.2 Profile Table
This page provides IPMC Profile related configurations. The IPMC profile is used to deploy the access control
on IP multicast streams. It is allowed to create at maximum 64 Profiles with at maximum 128 corresponding
rules for each. The Profile Table screen in Figure
Figure 4-3-5-4: IGMP State Transitions
4-3-5-5
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User's Manual of IGS PoE series
appears.
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