Symptom
On a Nexus 5000 switch, false transceiver warnings are seen in the syslog.
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Temperature Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Temperature Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Tx Power Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Tx Power Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Rx Power Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Rx Power Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Current Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Current Warning
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Temperature Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Temperature Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Tx Power Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Tx Power Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Rx Power Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Rx Power Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, High Current Warning cleared
%ETHPORT-4-IF_SFP_WARNING: Interface Ethernet1/1, Low Current Warning cleared
Conditions
Nexus 5000 switch is running NX-OS 5.2(1)N1(5) and both High and Low warnings are seen for the same test. E.g. Temperature, TX Power, RX Power, Current.
Workaround
Assuming the symptoms and conditions are met, these warnings are false positives and can be safely ignored.
