Cisco 7500 Series Configuration Manual page 57

Chapter 1 Cisco 7500 Series Product Overview
The RSP4/4+ contains the following components:
IDT R5000 Reduced Instruction Set Computing (RISC) processor, used for the CPU. The CPU runs
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at an external bus clock speed of 100 MHz and an internal clock speed of 200 MHz.
Up to 256 megabytes (MB) of parity-protected, dynamic random-access memory (DRAM) on two
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dual in-line memory modules (DIMMs); 32 MB of DRAM is the default shipping configuration.
2 MB of parity-protected, static random-access memory (SRAM) for packet buffering, and 512 KB
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of SRAM for secondary CPU cache memory functions. (SRAM is not user- configurable.)
Most of the additional memory components used by the system, including onboard Flash memory
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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
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monitoring functions is contained on the router interface card.)
In addition to running the system software from DRAM, the RSP4/4+ contains and executes the
following management functions that control the system:
• Sending and receiving routing protocol updates.
Managing tables and caches.
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Monitoring interface and environmental status.
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Providing Simple Network Management Protocol (SNMP) management and the interface between
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the console and Telnet.
Combining all of the switched routing and high-speed switching functions that communicate with
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and control the interface processors on the dual CyBus. This switching section decides the
destination of a packet and switches it accordingly.
The RSP4/4+ supports high system availability (HSA), which is a feature in Cisco IOS Release 11.1(4)
or later, allowing two RSPs to be used in a Cisco 7507, Cisco 7507-MX, Cisco 7513, or Cisco 7513-MX
router. By default, the system master is the RSP that occupies the first RSP slot in the router: slot 2 in
the Cisco 7507, and slot 6 in the Cisco 7513.
Note The Cisco 7576 uses only one RSP slot per router, designated router A and router B; therefore, it does
not support HSA. The Cisco 7505 has only one RSP slot; therefore, it also does not support the HSA
feature. The RSPs in these models are automatically the system master for their respective routers.
The RSP4/4+ ships as the following product numbers:
• As a spare part, as Product Number RSP4=
• Bundled with and installed in Cisco 7500 series routers, as the following product numbers:
–
–
–
–
–
–
The RSP4/4+ contains most of the memory components used by the system.
of each type of memory on the RSP4/4+.
OL-5008-03 B0
Product Number CISCO7505/4(=), a Cisco 7505 with one installed RSP4.
Product Number CISCO7507/4(=), a Cisco 7507 with one installed RSP4.
Product Number CISCO7513/4(=), a Cisco 7513 with one installed RSP4.
Product Number CISCO7507/4x2(=), a Cisco 7507 with two installed RSP4s.
Product Number CISCO7513/4x2(=), a Cisco 7513 with two installed RSP4s.
Product Number CISCO7576(=), a Cisco 7576 with two installed RSP4s. (This is the default
configuration when the Cisco 7576 is purchased new and not upgraded from a Cisco 7513.)
Route Switch Processor Overview
Cisco 7500 Series Installation and Configuration Guide
Table 1-8 lists the functions
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