Juniper Networks Routing Engine and Control Board - Base Bundle - router -

The host subsystem provides routing protocol processes, as well as software processes that control the router's interface, the chassis components, system management and user access to the router. These routing processes run on top of a kernel that interacts with the Packet Forwarding Engine. The Juniper MX2008 host subsystem consists of two Routing and Control Boards or RCBs. The RCB is an integrated board and a single FRU that provides the Routing Engine and Control Board functionality. The Routing Engine performs all route-processing functions, whereas the CB performs chassis control and management plane functionality. The RCB provides control plane functions. You can install one or two RCBs on the router. Each RCB functions as a unit.