In the Privileged EXEC mode of the switch, use the show fiber-ports-optical-transceiver command by entering the following: l interface interface-id - (Optional) Specify an Ethernet port ID. Note: In this example, te1/0/3 interface is used. Port - The port number on. An SFP module is a hot-swappable transceiver that converts electrical signals into optical (or electrical, in copper variants) signals. It enables flexible connectivity between networking devices and supports different speeds, wavelengths, and distances. Most Cisco optics also support Digital. When the optical module on an interface is faulty, you can run the display commands to view information about the optical module. Related Information Video Identify a Huawei-Certified Optical Module Run the display transceiver [ interface interface-type interface-number | slot slot-id ] [ verbose ]. Small Form-Factor Pluggable (SFP) modules are essential transceivers used in Cisco switches and routers to connect devices via fiber or copper cables. Knowing how to view SFP module details helps network engineers verify installation, monitor performance, troubleshoot issues, and maintain. 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. This article provides instructions on how to view the Optical Module Status on your switch through the Command Line Interface (CLI).