Chapter 1 Cisco 7500 Series Product Overview
Route Switch Processor Overview
•8 MB of parity-protected, static random-access memory (SRAM) for packet buffering, and 2 MB of SRAM for tertiary (L3) CPU cache memory functions (SRAM is not user-configurable).
•Most of the additional memory components used by the system, including onboard Flash memory and up to two PC Cards. (A bank of hardware [MAC-layer] addresses for the interface port is contained in an NVRAM device on the router backplane.)
•Air-temperature sensors for environmental monitoring. (All of the logic for the environmental monitoring functions is contained on the router interface card.)
In addition to running the system software from DRAM, the RSP8 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 RSP8 communicates with and controls the interface processors on the high-speed CyBus. This switching section of the RSP8 decides the destination of a packet and switches it based on that decision.
The RSP8 combines all of the switched routing and high-speed switching functions. The RSP8 supports the HSA feature, which allows two RSP8s to be used in a Cisco 7507, Cisco 7507-MX, Cisco 7513, or Cisco 7513-MX router. By default, the system master is the RSP8 that occupies the first RSP slot in the router: slot 2 in the Cisco 7507 and Cisco 7507-MX, and slot 6 in the Cisco 7513 and Cisco 7513-MX.
Note The RSP8 only supports the HSA feature when used with another RSP8. The Cisco 7505 and Cisco 7576 routers do not support the HSA feature.
The RSP8 is available as follows:
•As a spare part, as Product Number RSP8=
•Bundled with and installed in Cisco 7500 series routers, as follows:
–Product Number CISCO7507/8-MX, a Cisco 7507 with a mix-enabled backplane and one installed RSP8
–Product Number CISCO7513/8-MX, a Cisco 7513 with a mix-enabled backplane and one installed RSP8
–Product Number CISCO7507/8x2-MX, a Cisco 7507 with a mix-enabled backplane and two installed RSP8s
–Product Number CISCO7513/8x2-MX, a Cisco 7513 with a mix-enabled backplane and two installed RSP8s
The RSP8 contains most of the memory components used by the system. Table 1-9lists the functions of each type of memory on the RSP8.
| Cisco 7500 Series Installation and Configuration Guide |
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