Cisco NCS57D2 7.2T Fixed Base Chassis 66 QSFP | Router, Enterprise — SD-AR3K-NCS17D23

Support demanding backbone and aggregation roles with a chassis designed for dense, high-speed routing. Cisco’s NCS57D2 fixed base chassis provides the physical platform for 66 QSFP interfaces and a 7.2T class architecture, giving network teams room to build for throughput, port density, and operational separation at scale. This is the kind of platform chosen when the network cannot tolerate a consumer-grade compromise. The fixed chassis format suits controlled rack deployments where consistency, serviceability, and expansion planning matter more than low-cost shortcuts. By separating the hardware foundation from software licensing, it gives architects flexibility to align the platform with their own operating model and support strategy. For enterprise and service-provider environments, the value is in the chassis itself: dense optical connectivity, a purpose-built routing base, and the physical stability needed for long-lived infrastructure. It is a strong fit for teams standardizing on Cisco routing hardware and building networks where port count, optical scale, and chassis class matter more than feature bundling. Ideal For Core routing in enterprise backbone environments High-density optical aggregation in service-provider racks Infrastructure standardization for Cisco-based routing estates Hardware foundation for custom software and support models Why This Product 1 Higher port density than small branch routers 2 Chassis-based platform for core and aggregation roles 3 Hardware-only procurement without bundled software support 4 Built for QSFP-heavy optical environments