This read-create Unsigned32 sets a threshold at which an exception is logged if the number of (*,G,I) states on this interface exceeds it, with 0 meaning no warning threshold. It gives an admin advance warning before hitting the hard state limit on that interface. For example, setting this to 400 gives the admin an early warning log entry before the interface approaches its hard rlPimInterfaceStarGStateLimit of 500.