Centralized network timing. Control plane and data plane elements. This Cisco Route Switch Processor (RSP) is the powerful centralized engine that provides these features and more for Cisco ASR 900 series routers. The ASR 900 RSP addresses the requirements of converged service provider networks, from Carrier Ethernet technologies to advanced services such as Multiprotocol Label Switching (MPLS), helping providers add advanced traffic management and intelligent packet-switching and routing features.