Two rate three color marker (TrTCM) meters an incoming packet stream and marks the packets based on two rates, PIR

TrTCM Sand 4.23.1F Policer Two Rate Three Color Marker

4.21.3F introduces support for the feature on the platforms listed below. The TOI describing the feature support on different versions/platforms is available here. 

TOI EOS 4.21.3F TrTCM Policer Two Rate Three Color Marker Strata EOS 4.24.1F