RMON-5-FALLINGTRAP: Falling trap is generated because the value of [chars] has fallen below the falling-threshold value [dec]
This means a falling trap has been generated. The value of the specified MIB object has fallen below the falling threshold value. [chars] is the MIB object, and [dec] is the threshold value. This message applies to Catalyst 3750, 3560, 3550, 2970, 2960, 4000/4500 and 6000/6500 Switches.
If you have the configuration as this example shows: