. The Cisco 100BASE-X Small Form-factor Pluggable (SFP) is a hot-swappable input/output device that plugs into a Fast Ethernet port or slot linking the port with the network. The Cisco 100BASE-LX10 SFP operates on ordinary single-mode fiber-optic (SMF) link spans up to 10 kilometers long Key Product Info. Hot-swappable when deployed the switch or router does not have to reboot Supports the pay-as-you-populate model Supports the Cisco quality ID feature that enables the switch or router to identify whether or not the SFP is a Cisco qualified SFPOptically interoperable with respective 100BASE-X Ethernet interfaces on the same link