This value sets the upper limit of incoming multicast traffic on a port, measured over a 1-second interval in the unit chosen by hh3cStormCtrlMulticastUnit, above which the port is put into controlled status. An admin tunes this on ports carrying IPTV or multicast video streams to stop a multicast storm without needing to shut the port down manually. For example, a value of 10000 with the unit set to kbitsPerSecond caps multicast traffic at 10 megabits per second before the port throttles.