This object describes the reason why a port is currently auto-partitioned or otherwise disabled. A value of unknown(1) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of operational(1), as defined in RFC 1516, but the implementation cannot determine the exact reason why the port has auto-partitioned. A value of notPartitioned(2) indicates that the port currently has a rptrAutoPartitionState of notAutoPartitioned(1) and a rptrPortOperStatus of operational(1), as defined in RFC 1516. A value of managementPartitioned(3) indicates that the port currently has a rptrPortAdminStatus of disabled(2) (or is otherwise not operational) and a rptrAutoPartitionState of notAutoPartitioned(1), as defined in RFC 1516. However, if the port currently has a rptrPortAdminStatus of disabled(2) and a rptrAutoPartitionState of autoPartitioned(2), but the implementation cannot determine the exact reason why the port has auto-partitioned, then a value of managementPartitioned(3) is returned. A value of excessiveCollision(4) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of operational(1), as defined in RFC 1516. The repeater auto-partitioned this port because it detected an 'excessive length collision' condition. A value of excessiveCollisionAndMgmtPart(5) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of notOperational(2), as defined in RFC 1516. The repeater auto-partitioned this port because it detected an 'excessive length collision' condition. A value of consecutiveCollisions(6) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of operational(1), as defined in RFC 1516. The repeater auto-partitioned this port because it detected an 'excessive number of consecutive collisions' condition. A value of consecutiveCollisionsandMgmtPart(7) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of notOperational(2), as defined in RFC 1516. The repeater auto-partitioned this port because it detected an 'excessive number of consecutive collisions' condition. A value of jabber(8) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of operational(1), as defined in RFC 1516. The repeater auto-partitioned this port because it detected an 'excessive length input message' condition. A value of jabberAndMgmtPart(9) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of notOperational(2), as defined in RFC 1516. The repeater auto-partitioned this port because it detected an 'excessive length input message' condition. A value of noCarrierLoopback(10) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of operational(1), as defined in RFC 1516. The repeater auto-partitioned this port because it detected a 'no receive activity during transmission' condition. A value of noCarrierLoopbackAndMgmtPart(11) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of notOperational(2), as defined in RFC 1516. The repeater auto-partitioned this port because it detected a 'no receive activity during transmission' condition. A value of transmitCarrierDropout(12) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of operational(1), as defined in RFC 1516. The repeater auto-partitioned this port because it detected a 'transmit carrier drop' condition. A value of transmitCarrierDropoutAndMgmtPart(13) indicates that the port currently has a rptrAutoPartitionState of autoPartitioned(2) and a rptrPortOperStatus of notOperational(2), as defined in RFC 1516. The repeater auto-partitioned this port because it detected a 'transmit carrier drop' condition.