IGMPv3
RFC3376
Enables hosts to listen only to a specified subset of the
hosts sending to the group
Source = 1.1.1.1
Group = 224.1.1.1
Source  = 2.2.2.2
Group = 224.1.1.1
R2
R1
R3
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