ALR0642W The Loss of Signal Rate of port port name in device device name was measured to be measured value cnt/s, which violated the defined warning-idle boundary value of boundary value cnt/s.

Explanation

The Loss of Signal Rate measures the rate at which the port lost communication with its partner port. These types of errors usually indicate physical link problems, caused by faulty SFP modules or cables, or caused by faulty connections at the switch or patch panel. However in some cases this can also occur due to exceeding the maximum link distance between ports, for the type of connecting cable and light source. A threshold was defined on this metric, which causes the measured value to be compared to the defined boundaries for each set of performance statistics collected from the switch.

This message indicates that a threshold boundary violation occurred. In this case, the specified port in the storage system or switch has a Loss of Signal Rate value that is less than or equal to the warning-idle boundary, but greater than the critical-idle boundary that was defined for the related threshold.