Cisco GLC-FE-100LX 100BASE-LX SFP for FE Port

Extend Fast Ethernet over fiber where distance, interference, or cable plant constraints make copper impractical. Cisco GLC-FE-100LX is a 100BASE-LX SFP designed for FE ports, giving network teams a compact optical option for access and aggregation links that need consistent transport across longer runs. This module fits the operational reality of enterprise networks: mixed media, legacy Fast Ethernet segments, and the need to keep infrastructure simple at the edge. By moving the link to fiber, you reduce susceptibility to electromagnetic interference and preserve signal integrity across environments where copper can become a liability. For organizations maintaining installed Fast Ethernet infrastructure, this SFP offers a straightforward way to extend service without replacing the surrounding switching architecture. It is a practical choice when you need a targeted optical transceiver rather than a broader platform refresh. That makes it especially useful in environments where uptime, compatibility, and controlled spend matter more than feature inflation.