Users Guide

IPv4 and IPv6 Multicast 1605
Figure 46-7. PIM-SM SPT—Part 4
• At this point, the RP no longer needs the flow of (S, G) traffic since all
branches of the Shared Tree (in this case there is only one) have pruned off
the flow of (S, G) traffic.
• As a result, the RP will send (S, G) Prunes back toward the source to shut
off the flow of the now unnecessary (S, G) traffic to the RP.
NOTE: This will occur if the RP has received an (S, G) RP-bit Prune on all
interfaces on the Shared Tree.