This read-create INTEGER, when non-zero, specifies the trap type id associated with packets matched by this class map, relevant only when rlQosClassMapRedirectAction is set to trap or mirror. An admin uses this to tag matched traffic with a specific trap identifier so that downstream trap-handling or monitoring systems can distinguish which class map triggered the notification. For example, an admin wanting distinct alerting for a security-sensitive traffic class would set this field to a unique trap id and set the redirect action to trap, so matching packets generate a recognizable, class-specific notification.