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Cisco Route Switch Processor 4

The Route Switch Processor 4 (RSP4) is the main system processor for the Cisco 7500 Series Router. The RSP4 combines all of the routing and high-speed switching functions for the Cisco 7500 series router. In addition to running the system software, the RSP4 contains and executes the following management functions that control the system:

  • Sending and receiving routing protocol updates
  • Managing tables and caches
  • Monitoring interface and environmental status
  • Providing Simple Network Management Protocol (SNMP) management and the interface between the console and Telnet

The high-speed switching section of the RSP4 communicates with and controls the interface processors on the Cisco 7500's internal high-speed buses. This switching section determines the destination of a packet, and switches it based on that decision.

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