The centralized architecture of the Cisco 10000 Series Router enables a simplified, cost-competitive SIP design that delivers all of the advanced hierarchical QoS (HQoS), high availability, scalability, and forwarding capabilities of the PREs to a wide range of SPA interfaces for maximum flexibility and price/performance.The Cisco 10000 Series SIP-600 supports four single-height or two double-height SPAs using two adjacent line-card slots of the Cisco 10000 Series Router. Using application-specific integrated circuits (ASICs) and the flexibility to bond together point-to-point links, the SIP provides up to 11.2 Gbps of bandwidth and support for 10 Gigabit Ethernet interface at line-rate.SPA modularity greatly extends the port density on the current Cisco 10000 Series chassis and offers customers flexible interface deployment options, making the Cisco 10000 Series Router an ideal choice for service provider customers who need high-density aggregation at the edge with the ability to share next-generation interfaces across multiple Cisco platforms.