Adjusting Control Parameters for a Multicast Source
A multicast device can control the forwarding of multicast
data based on multicast sources. This helps to control multicast data
flows and limit information that can be obtained by downstream receivers
to enhance security.
A multicast device starts a timer for each (S, G) entry. If the multicast device does not receive any multicast packets from a multicast source within the set lifetime of the multicast source, it considers that the (S, G) entry becomes invalid and the multicast source stops sending multicast data to the multicast group.