Articles by tag "transceiver diagnostics"

1. Why Is the SFP LED Flashing Green on Cisco NM-8X? Understanding Port Activity and Troubleshooting
   Selene Gong

   49
   A flashing green SFP LED on your Cisco NM-8X network module, part of the Catalyst 9300 Series switches, is generally a normal indication of data activity. It means the port is actively sending or receiving data. This is typically a healthy sign of link operation. However, depending on the ...