Build dense 25 GbE links without overcomplicating the fiber plant. The Aruba R9F89A is a 25G SFP28 SR transceiver designed for multimode fiber environments that need fast, short-reach connectivity with predictable deployment characteristics. Using an LC connector and supporting up to 100 m, it fits cleanly into server-to-switch uplinks, top-of-rack architectures, and leaf-spine designs where port density and optical simplicity are both important. At 25 Gbps, this module gives infrastructure teams the bandwidth headroom needed for virtualization clusters, storage traffic, and east-west application flows. The SFP28 form factor keeps it compatible with modern 25 GbE ports while preserving the compact footprint that high-density switching requires. For teams standardizing on Aruba networking hardware, it provides a direct path to consistent optical performance across access and aggregation layers. Choose this transceiver when you need 25 GbE speed in a short-reach multimode design and want optics that match the economics of modern data center fabrics. It is a practical upgrade path from 10 GbE where port efficiency and throughput both matter.