User’s Manual of
message, and query messages that are specific to a given group.
The states a computer will go through to join or to leave a multicast group are shown below:
Leave Group | Leave Group | |
(Stop Timer) | ||
Join Group | ||
| (Send Report, | |
| Start Timer) |
| Query Received |
| |
Delaying Member | (Start Timer) | Idle Member | |
Report Received | |||
|
| ||
| (Stop Timer) |
| |
| Timer Expried |
| |
| (Send report) |
|
Figure 4-9-4 IGMP State Transitions
IGMP Querier –
A router, or
Multicast routers use this information, along with a multicast routing protocol such as
DVMRP or PIM, to support IP multicasting across the Internet.
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