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.
Before adjusting control parameters for a multicast source, complete the following tasks:
Configuring a unicast routing protocol
pim [ vpn-instance vpn-instance-name ]
source-lifetime interval
If the lifetime of the source expires, the (S, G) entry becomes invalid.