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CONFIDENTIAL
26-Jan-04
© 2002 Procket Networks, Inc. All rights reserved.
Source = 1.1.1.1
Group = 224.1.1.1
H1 - Member of 224.1.1.1
R1
R3
R2
Source  = 2.2.2.2
Group = 224.1.1.1
IGMPv3: MODE_IS_INCLUDE
Join    1.1.1.1, 224.1.1.1
IGMPv3
•H1 wants to receive from S = 1.1.1.1 but not from S = 2.2.2.2
•With IGMPv3, specific sources can be pruned back - S = 2.2.2.2 in this case
RFC3376
Enables hosts to listen only to a specified subset of the hosts sending to the group
Video Server
Video Server
IGMPv3 Example (future)
In this example, host “H1” has joined group 224.1.1.1 but only wishes to receive traffic from Source 1.1.1.1.  Using an as yet unspecified IGMPv3 mechanism, the host can inform the designated router, “R3”, that it is only interested in multicast traffic from Source 1.1.1.1 for Group 224.1.1.1.  Router “R3” could then potentially “prune” this specific (S,G) traffic source.