Auto-module speed detection
When you enable auto-module speed detection, the system reads information from the module and sets the port speed to the maximum speed that is advertised by the module. If the system encounters a problem when reading from the module, it sets the default speed (default value is platform specific).
When auto-module sets the speed, the system creates a log entry noting this speed.
NOTE: Auto-speed detection is supported on 1/10G ports, but not on higher speed ports (such as 40G).