Cisco 7206VXR - VPN Bundle Router Configuration Manual page 30

Field-Replaceable Units
System controller
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Upgradable memory modules
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Packet SRAM for storing packets of information in preparation for fast switching
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Cisco 7200 VXR Installation and Configuration Guide
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– The NPE-175 has an RM5270 microprocessor that operates at an internal clock speed of
200 MHz.
The NPE-100 and NPE-150 have an R4700 microprocessor that operates at an internal clock
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speed of 150 MHz.
The NPE-G2 has one system controller that provides processor access to the three midplane PCI
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buses, and also holds the system memory and environmental monitoring functions.
The NPE-G1 BCM 1250 maintains and executes the system management functions for the
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Cisco 7200 VXR routers and also holds the system memory and environmental monitoring
functions.
The NSE-1 has one system controller that provides processor access to the midplane and single
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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 NPE-300 has two system controllers that provide processor access to the two midplane and
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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-175 and NPE-225 have one system controller that provides processor access to the two
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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-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-G2 uses SDRAM for storing all packets received or sent from network interfaces, The
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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.
The NPE-G1 uses SDRAM for storing all packets received or sent from network interfaces. The
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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.
– The NSE-1 uses SDRAM for providing code, data, and packet storage.
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.
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.
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
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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.
Chapter 1 Cisco 7200 VXR Product Overview
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