Setting thresholds for Tx/Rx on E-ports so that the administrator can log alerts for this value will be a good way to:

E-port Tx/Rx thresholds relate to switch-to-switch communication bandwidth, not directly to the capacity of connected servers.

E-ports (expansion ports) in Fibre Channel networks are used to connect switches together via ISLs. Monitoring Tx/Rx thresholds on E-ports helps administrators track the utilization and potential congestion of these links. Consistent breaching of these thresholds indicates that the existing ISLs are approaching their capacity, signaling the need for more ISLs to maintain performance.

While storage arrays connect to the SAN, E-port thresholds specifically monitor switch link utilization, not the fill-level of a storage array itself.

Fiber cable degradation might affect Tx/Rx levels, but consistent threshold breaches primarily indicate bandwidth saturation, making it a better predictor of ISL needs rather than specific cable failure.