Hardware Component Monitoring

In this section:

1. Virtual Cable Testing
   The Virtual Cable Test (VCT) is a cable diagnostic feature within the physical layer (PHY) used for detecting cable faults and serving as a diagnostic tool.
2. Proactive Monitoring of Cable Signal Errors and Logging
   Proactive Monitoring of Cable Signal Errors and Logging helps to identify deteriorating cables in a network. Cable signal errors are identified proactively and, once identified, a SYSLOG message is logged so that you can check and monitor the link.
3. Digital Optical Monitoring
   Digital optical monitoring (DOM) provides a diagnostic monitoring interface for SFP and SFP+ optics. DOM supports monitoring of optical output power, optical input power, temperature, laser bias current, and transceiver voltage.
4. Syslog Messages for Optical Transceivers
   The system generates syslog messages for optical transceivers in the following circumstances: