Chapter 1 Cisco 7200 VXR Product Overview
Field-Replaceable Units
1-14
Cisco 7200 VXR Installation and Configuration Guide
78-5469-03
Network Processing Engine or Network Services Engine
The network processing engine or network services engine maintains and
executes the system management functions for Cisco 7200 series VXR routers.
Also, the network processing engine or network services engine shares the system
memory and environmental monitoring functions with the I/O controller.
Cisco 7200 VXR routers support six versions of the network processing engine:
NPE-100, NPE-150, NPE-175, NPE-200, NPE-225, NPE-300 and NPE-400.
These network processing engines have the same functionality; however, their
performance differs because of the microprocessor type and the type of memory
for packet data (SRAM and DRAM, or SDRAM) that each network processing
engine provides.
Note The NPE-100, although still supported, is no longer an
orderable product as of May 2000.
Cisco 7200 VXR routers also support the NSE-1, which consists of two modular
boards: the processor engine board and the network controller board. The NSE-1
Parallel eXpress Forwarding (PXF) processor works with the routing processor to
provide accelerated packet switching, as well as accelerated IP Layer 3 feature
processing.
Note Detailed instructions for removing and replacing the network
processing engines or network services engine are contained in the
Network Processing Engine and Network Services Engine
Installation and Configuration publication. This document
accompanies every network processing engine or network services
engine that is shipped from the factory as a FRU. It is also available
on the Documentation CD-ROM and on Cisco Connection Online
(CCO).
The network processing engines and network services engine consist of the
following components:
• Reduced instruction set computing (RISC) microprocessor
–
The NPE-100 and NPE-150 have an R4700 microprocessor that operates
at an internal clock speed of 150 MHz.
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