The Cisco 12000 Series routers compose a portfolio of intelligent routing solutions that scale from 2.5- to n x10 Gbps capacity per slot, enabling carrier-class IP/Multiprotocol Label Switching (MPLS) networks and accelerating the evolution to IP Next-Generation Networks. Built upon a foundation of investment protection, this portfolio delivers up to 1.28-terabits-per-second of switching capacity with wire-speed feature performance, scalability, and graceful hardware and software upgrade paths. Now these chassis have been enhanced with new cooling, fabric, and power components to support an increased number of modular interfaces for even greater service density and flexibility.