The Cisco ASR 9000 series aggregation services routers represent an exciting paradigm in high-end routing, with exceptional scalability, carrier-class reliability, environmentally conscious design, incredible flexibility, and an attractive price-to-performance benchmark. The Cisco ASR 9000 series is designed to provide true carrierclass reliability using the Cisco IOS XR operating system, comprehensive system redundancy, and a full complement of network resiliency schemes. Finally, the Cisco ASR 9000 series is designed to simplify and enhance the operational and deployment aspects of service-delivery networks.