Is it a core or edge router? What defines a core router? An edge router? The trend has been to make the edge router "smart" and the core router "dumb and fast." Does this trend still hold true today? How are service providers using routers? Ray Mota of ACG Research and Sanjeev Mervana of Cisco Systems, discuss what defines core routers from edge routers, the architecture requirements of core, drivers for these requirements, forwarding and control planes, service substantiation and what makes both Cisco's and Juniper's products true core routers.