This field is set to TRUE to initiate an LSP Ping Connectivity Verification transaction. Changing this field from TRUE to FALSE will cancel the Connectivity Verification transaction that is in progress. Setting this field to TRUE, when this field is already set to TRUE or mplsCvTrMpTrStatus is set to TRUE is illegal, as only one LSP Ping transaction can be in progress at any one time. Setting this field to FALSE when it is already FALSE has no effect. On receipt of a MIB Get message, DC-OAM will return TRUE if a Connectivity Verification transaction is in progress and FALSE otherwise. I.e. DC-OAM resets this field to FALSE when the Connectivity Verification transaction is completed.