BigIron RX Series Configuration Guide 599
53-1002253-01
PIM dense
23
When a node on the multicast delivery tree has all of its downstream branches (downstream
interfaces) in the prune state, a prune message is sent upstream. In the case of R4, if both R5 and
R6 are in a prune state at the same time, R4 becomes a leaf node with no downstream interfaces
and sends a prune message to R1. With R4 in a prune state, the resulting multicast delivery tree
would consist only of leaf nodes R2 and R3.
FIGURE 90 Transmission of multicast packets from the source to host group members
...
...
...
229.225.0.1
Group
Member
Group
Member
Video Conferencing
Server
(207.95.5.1, 229.225.0.1)
(Source, Group)
229.225.0.1
Group
Member
Group
Member
Group
Member
Group
Member
Group
Member
Group
Member
229.225.0.1
Leaf Node
Leaf Node
Leaf Node
(No Group Members)
Intermediate Node
(No Group Members)
R2
R1
R3
R4
R5
R6
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