Keep data center traffic moving with a fixed Cisco platform built for dense, mixed-speed routing. The NCS55A1 brings together 24 x 1/10G ports, 24 x 10/25G ports, and 6 x 100G ports, giving infrastructure teams a practical way to support access, aggregation, and high-speed uplinks from a single system. This configuration is well suited to environments where port mix matters as much as raw speed. It can absorb legacy 1G and 10G connections while providing a clear path to 25G and 100G uplinks, helping teams standardize around fewer platforms and cleaner network tiers. For procurement and architecture teams, that means a stronger case for a higher-value router that can stay relevant through multiple refresh cycles. Use it where density, speed diversity, and predictable routing behavior are essential: data center edge, leaf-spine aggregation, and high-capacity interconnects. The fixed design reduces complexity while preserving the port profile needed for serious infrastructure planning.