Cisco XR 12000 Series Routers

The Cisco XR-12000/6 Router Chassis delivers capacity and services with its fully distributed forwarding architecture and high-efficiency crossbar switch fabric. The combination of a centralized scheduler and unique virtual-output-queuing (VOQ) technology is aimed at maximizing the use of the switch fabric bandwidth, minimizing latency, and providing non-blocking performance.

The Cisco XR 12404 router scales the Internet Service Provider edge from speeds of T3/E3 (44.7/34.4 Mbps) up to OC-192/STM-64 or 10GE (10 Gbps). Network interfaces reside on the line cards that provide the connection between the router's CSF and the external networks. The bottom slot is a dedicated slot for the combined CSF card.