Filter
Top Products
2-3
Network Processing Engine and Network Services Engine Installation and Configuration
OL-4448-12
Chapter 2 NPE-175 and NPE-225 Overview
NPE-175 and NPE-225 Description and Overview
Figure 2-2 NPE-225
The NPE-175 and NPE-225 consist of the following components:
• Reduced instruction set computing (RISC) microprocessor
–
The NPE-175 has an RM5270 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.
• System controller
The system controller provides hardware logic to interconnect the processor, DRAM, and the
PCI-based system backplane bus. The NPE-175 and NPE-225 have one system controller that
provides processor access to the two midplane and single I/O controller peripheral component
interconnect (PCI) buses. The system controller also allows port adapters—on either of the two
midplane PCI buses—access to SDRAM.
• Upgradable memory modules
The NPE-175 and NPE-225 use SDRAM for providing code, data, and packet storage.
• Cache memory
The NPE-175 and NPE-225 have unified cache SRAM that functions as the secondary cache for the
microprocessor. (The primary cache is within the microprocessor.)
• Two environmental sensors for monitoring the cooling air as it leaves the chassis
1 Network controller board 6 Handle
2 System controller 7 Midplane connectors
3 Processor engine board 8 Boot ROM (U1)
4 Captive installation screw 9 Temperature sensor
5 RM5271 microprocessor 10 SDRAM DIMM (U15)
66417
N
ET
W
O
R
K
PR
O
C
ESS
IN
G
EN
G
IN
E-200
1
7
4
65
2
3
8
9
10