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) in the command display, provides information on transceiver parameters including temperature, supply voltage, laser bias current, laser power, received optical power, and related alarm thresholds.

transceiver-monitor
The setting for transceiver-monitor:

Console(config)#interface ethernet 1/X
Console(config-if)#transceiver-monitor

Use this command "transceiver-monitor" can monitor the current transceiver status, such as Temperature, TX power, RX power.
When any of the transceiver's operational values fall outside of specified thresholds, the switch will send the trap.

transceiver-threshold
The setting for transceiver-threshold:

Console(config)#interface ethernet 1/X
Console(config-if)#transceiver-threshold { current | rx-power | temperature | tx-power | voltage }

Use this command "transceiver-threshold" can set the default threshold from the transceiver to determine when an alarm or warning message should be sent.

Support Models: ECS4620 series, ECS4510 series, ECS4120 series, ECS4100 series, ECS2100 series, ECS2110 series

Topology:

Insert the transceiver --- (25)ECS4620-28T(1) --- SNMP server

The procedure to monitor the transceiver status :

Step 1: Configure the switch's IP address and enable the SNMP trap.

Console#con
Console(config)#interface vlan 1
Console(config-if)#ip address 192.168.1.1/24
Console(config-if)#exit
Console(config)#snmp-server host 192.168.1.100 inform private version 2c

Step 2: Check the transceiver's information currently.

At this time, the RX power is not within the range of the default threshold of the Low Alarm/Waring.

Step 3: Enable the transceiver-monitor.

Console#con
Console(config)#interface ethernet 1/25
Console(config-if)#transceiver-monitor

Step 4: The switch will send out the SNMP trap (SFPThresholdAlarmWarnTrap).

The procedure to change the transceiver-threshold :

 Step 1: Check the transceiver DDM Thresholds currently.

Step 2: Configure the threshold of the Temperature.

Console(config)#interface ethernet 1/25
Console(config-if)#no transceiver-threshold-auto 
Console(config-if)#transceiver-threshold temperature high-warning 7500 
Console(config-if)#transceiver-threshold temperature high-alarm 8500

Step 3: Check the modification of the transceiver's information.