Route dense Ethernet aggregation traffic through a fixed Cisco NCS 5501 scale chassis that combines 40 10 Gbps Ethernet interfaces with 4 100 Gbps Ethernet interfaces. This interface arrangement concentrates a large population of 10G-facing connections while maintaining higher-capacity paths for aggregation, core, peering, or transport connectivity. The Cisco NCS-5501-SE= is intended for carrier-grade routing environments where port density and a defined 10G-to-100G interface mix are central platform requirements. The 40 10 Gbps interfaces provide connection density for edge-facing routers, aggregation domains, transport handoffs, and service-facing network segments operating at 10G. Four 100 Gbps interfaces add higher-bandwidth connectivity where aggregated traffic must move toward a larger routing domain. This split lets architects place many lower-rate Ethernet links and a smaller number of high-capacity links in the same routing chassis rather than assigning separate systems to each interface speed. Within the NCS 5501 platform family, this configuration is distinguished by its specific 40-port 10 Gbps and 4-port 100 Gbps interface allocation. It is a scale-chassis configuration for deployments that need substantial 10G density without giving up 100G connectivity. Select it when the planned topology calls for these interface counts and speeds; the 44 total Ethernet interfaces define the connectivity available from this chassis configuration.