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>They connect switches, routers, and servers through fiber-optic or copper links, ensuring reliable communication between infrastructure layers. For network engineers, knowing how to view and interpret SFP information from the Cisco command-line interface (CLI) is essential. But I can find any command to check gigabit only ethernet link. for example WS-X6724-SFP Is there no command to check fiber link?? Thank you 04-01-2009 10:48 PM It's got. If you run fiber or copper uplinks in a small office, home lab, or data closet, SFPs (and SFP+) are the little parts that keep your links alive. This guide gives a practical, CLI-focused workflow for checking SFP health and diagnostics on Cisco switches, shows the exact commands you'll use. 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. Replace sfp1_name with the SFP name or leave out the name and select a number. Results name: sfp1 status: link-ok auto-negotiation: done full-duplex: yes tx-flow-control: no rx-flow-control: no advertising:. How to check fiber ports in cisco switch? 1.
