Cisco 100base x sfp for fast ethernet sfp ports product overview the ciscoreg 100base x small form factor pluggable sfp is a hot swappable inputoutput device that plugs into a fast ethernet port or slot linking the port with the network main features include the following hot swappable when deployed the switch or router does not have to reboot supports the pay as you populate model interchangeable with other 100base x sfps on the same line card supports the cisco quality id f