Cisco CPAK-100G-LR4 10 km SMF Transceiver | Enterprise Optics — CON-OS-ASR9906N

When the network needs 100 GbE across a longer fiber span, the optics have to do more than pass traffic. Cisco’s CPAK-100G-LR4 transceiver module is designed for 10 km single-mode fiber links, giving infrastructure teams a direct path to high-capacity connectivity across campus, metro, and inter-site environments. The LR4 specification is built for long-reach Ethernet transport, making it a practical choice when short-reach optics fall short and more complex transport layers are unnecessary. By keeping the design centered on 100 GbE over SMF, this module supports cleaner planning for uplinks, aggregation, and data center interconnects where optical reach is part of the architecture, not an afterthought. For Cisco environments that depend on ASR 9000-class routing and switching, this module helps preserve the performance profile expected from premium optics: high throughput, long reach, and a deployment model that stays focused on Ethernet. It is the kind of component that earns its place in networks where link reliability and platform fit are worth paying for. Ideal For Campus backbone links between network buildings Metro aggregation connections across Cisco sites Data center interconnects over single-mode fiber High-speed uplinks in ASR 9000-class deployments Why This Product 1 10 km reach supports longer links than short-reach 100G optics 2 100 GbE throughput fits high-capacity backbone and interconnect designs 3 CPAK format aligns with Cisco platform requirements 4 Single-mode LR4 design suits campus and metro deployments