Execute the following command to view detailed interface and optical module status: show interface <interface-type> <interface-number>Execute the following command to view detailed interface and optical module status: show interface <interface-type> <interface-number>When optical modules operate on a switch, it is usually necessary to read the module's internal information to understand its working status—such as connection status and real-time metrics like optical power and temperature. Additionally, identifying module information helps detect coding. Enterprise LANs use the RJ45 port on 100/1000BASE switches. It connects access layer devices and uplinks from desktop switches or directly to end devices. The command is like this: To access the Cisco switch's privileged EXEC mode, use the 'fiber-ports-optical-transceiver' CLI. In. This guide gives a practical, CLI-focused workflow for checking SFP health and diagnostics on Cisco switches, shows the exact commands you'll use, explains what the numbers mean, and compares OEM (Cisco) vs third-party modules so you can pick the right SFP module supplier for reliability and cost.
