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Cisco 7200 VXR Installation and Configuration Guide
78-5469-03
Chapter 1 Cisco 7200 VXR Product Overview
Field-Replaceable Units
–
The NPE-175 has an RM5270 microprocessor that operates at an internal
clock speed of 200 MHz.
–
The NPE-200 has an R5000 microprocessor that operates at an internal
clock speed of 200 MHz.
–
The NPE-225 has an RM5271 microprocessor that operates at an internal
clock speed of 262 MHz.
–
The NPE-300 uses an RM7000 microprocessor that operates at an
internal clock speed of 262 MHz.
–
The NPE-400 uses an RM7000 microprocessor that operates at an
internal clock speed of 350 MHz.
–
The NSE-1 uses an RM7000 microprocessor that operates at an internal
clock speed of 262 MHz.
• System controller
–
The NPE-100, NPE-150, and NPE-200 have a system controller that uses
direct memory access (DMA) to transfer data between DRAM and packet
SRAM on the network processing engine.
–
The NPE-175 and NPE-225 have one system controller that provides
processor access to the two midplane and single I/O controller PCI buses.
The system controller also allows the port adapters on either of the two
midplane PCI buses to access SDRAM.
–
The NPE-300 has two system controllers that provide processor access to
the two midplane and single I/O controller PCI buses. The system
controller also allows port adapters on either of the two midplane PCI
buses to access SDRAM.
–
The NPE-400 has one system controller that provides system access.
–
The NSE-1 has one system controller that provides processor access to
the midplane and single I/O controller PCI buses. The system controller
also allows port adapters on either of the two midplane PCI buses to
access SDRAM.
• Upgradable memory modules
–
The NPE-100, NPE-150, and NPE-200 use DRAM for storing routing
tables, network accounting applications, packets of information in
preparation for process switching, and packet buffering for SRAM
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