Use Digital Diagnostic Monitoring (DDM) to monitor laser operating characteristics such as temperature, voltage, current, and power. This feature works during active laser operation without affecting data traffic. Transceivers in various form factors support DDM. Use the CLI command show pluggable-optical-modules {basic|config|detail|temperature|voltage} to make use of DDM functionality.
An interface that supports DDM is a Digital Diagnostic Interface (DDI). These devices provide real-time monitoring of individual DDI transceivers on a variety of switches and routers. The DDM software provides warnings or alarms when the temperature, voltage, laser bias current, transmitter power or receiver power fall outside of vendor-specified thresholds during initialization.
For information about DDM and supported transceivers, see Extreme Optics website and Port Performance Management.
Switch:1#show pluggable-optical-modules config
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Pluggable Optical Module Global Configuration
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ddm-monitor : disabled
ddm-monitor-interval : 5
ddm-traps-send : enabled
ddm-alarm-portdown : disabled