Administrator Guide

IPv4 and IPv6 Multicast 1521
Figure 46-5. PIM-SM SPT—Part 2
• Finally, special (S, G) RP-bit Prune messages are sent up the Shared Tree to
prune off this (S, G) traffic from the Shared Tree.
If this were not done, (S, G) traffic would continue flowing down the
Shared Tree resulting in duplicate (S, G) packets arriving at the receiver.