Cisco 7200 VXR User Manual
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Cisco 7200 VXR Installation and Configuration Guide
OL-5013-09
Chapter 1 Cisco 7200 VXR Product Overview
Field-Replaceable Units
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The NPE-175 has an RM5270 microprocessor that operates at an internal clock speed of
200 MHz.
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The NPE-100 and NPE-150 have an R4700 microprocessor that operates at an internal clock
speed of 150 MHz.
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System controller
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The NPE-G2 has one system controller that provides processor access to the three midplane PCI
buses, and also holds the system memory and environmental monitoring functions.
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The NPE-G1 BCM 1250 maintains and executes the system management functions for the
Cisco 7200 VXR routers and also holds the system memory and environmental monitoring
functions.
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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.
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The NPE-400 has one system controller that provides system access.
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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.
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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.
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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.
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Upgradable memory modules
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The NPE-G2 uses SDRAM for storing all packets received or sent from network interfaces, The
SDRAM also stores routing tables and network accounting applications. A single SDRAM
memory array in the system allows concurrent access by port adapters and the processor.
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The NPE-G1 uses SDRAM for storing all packets received or sent from network interfaces. The
SDRAM also stores routing tables and network accounting applications. Two independent
SDRAM memory arrays in the system allow concurrent access by port adapters and the
processor.
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The NSE-1 uses SDRAM for providing code, data, and packet storage.
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The NPE-400 uses SDRAM for storing all packets received or sent from network interfaces. The
SDRAM memory array in the system allows concurrent access by port adapters and the
processor.
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The NPE-300 uses SDRAM for storing all packets received or sent from network interfaces. The
SDRAM also stores routing tables and network accounting applications. Two independent
SDRAM memory arrays in the system allow concurrent access by port adapters and the
processor.
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The NPE-175 and NPE-225 use SDRAM for providing code, data, and packet storage.
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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 overflow (except in the NPE-100, which contains no packet
SRAM). The standard configuration is 32 MB, with up to 128 MB available through single
in-line memory module (SIMM) upgrades.
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Packet SRAM for storing packets of information in preparation for fast switching