This object specifies the reason why the MEG operational status as mentioned by the object fsMplsTpOamMegOperStatus is down. This object is used to send the notification to the SNMP manager about the MEG. The bit 0 (megDown) when set, indicates that the MEG is down i.e., when MEG is made down administratively. The bit 1 (meDown) when set, indicates that the ME table is down i.e., when ME is made down administratively. The bit 2 (oamAppDown) when set, indicates that the OAM application has notified that the entity (LSP or PW) monitored by this MEG is down. Currently, BFD is the only supported OAM application. The bit 3 (pathDown) when set, indicates that the underlying LSP or PW is down.