Use the Interface > Port > Transceiver page to display identifying information, and operational status for optical transceivers which support Digital Diagnostic Monitoring (DDM). This page can also be used to configure thresholds for alarm and warning messages for optical transceivers which support DDM.
Showing InformationPort number.
Information on connector type and vendor-related parameters.
Information on temperature, supply voltage, laser bias current, laser power, and received optical power.
The switch can display diagnostic information for SFP modules which support the SFF-8472 Specification for Diagnostic Monitoring Interface for Optical Transceivers. This information allows administrators to remotely diagnose problems with optical devices. This feature, referred to as Digital Diagnostic Monitoring (DDM) provides information on transceiver parameters .
Sends a trap when any of the transceiver’s operation values falls outside of specified thresholds. (Default: Disabled)
Uses default threshold settings obtained from the transceiver to determine when an alarm or trap message should be sent. (Default: Enabled)
Information on alarm and warning thresholds. The switch can be configured to send a trap when the measured parameter falls outside of the specified thresholds.
The following alarm and warning parameters are supported:
High Alarm - Sends an alarm message when the high power threshold is crossed.
High Warning - Sends a warning message when the high power threshold is crossed.
Low Warning - Sends a warning message when the low power threshold is crossed.
Low Alarm - Sends an alarm message when the low power threshold is crossed.
The configurable ranges are:
Temperature: -128.00-128.00 °C
Voltage: 0.00-6.55 Volts
Current: 0.00-131.00 mA
Power: -40.00-8.20 dBm
The threshold value for Rx and Tx power is calculated as the power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW).
Threshold values for alarm and warning messages can be configured as described below.
A high-threshold alarm or warning message is sent if the current value is greater than or equal to the threshold, and the last sample value was less than the threshold. After a rising event has been generated, another such event will not be generated until the sampled value has fallen below the high threshold and reaches the low threshold.
A low-threshold alarm or warning message is sent if the current value is less than or equal to the threshold, and the last sample value was greater than the threshold. After a falling event has been generated, another such event will not be generated until the sampled value has risen above the low threshold and reaches the high threshold.
Threshold events are triggered as described above to avoid a hysteresis effect which would continuously trigger event messages if the power level were to fluctuate just above and below either the high threshold or the low threshold.
Trap messages configured by this command are sent to any management station configured as an SNMP trap manager using the Administration > SNMP (Configure Trap) page.