cFCCLastCongestedTime 1.3.6.1.4.1.9.9.365.1.2.1.1.6

The value of sysUpTime at the most recent time the congestion state of the Port changed to noCongestion(1) from some other value. 0 if the congestion state of the Port has never transitioned to noCongestion(1) since the last restart of the device.