Network Processing Engine and Network Services Engine Installation and Configuration
NPE-175 and NPE-225 Overview
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NPE-175 and NPE-225 Overview

Table Of Contents

NPE-175 and NPE-225 Overview

Supported Platforms

Software Requirements

NPE-175 and NPE-225 Description and Overview

Components

System Management Functions

Terms and Acronyms

NPE-175 and NPE-225 Memory Information


NPE-175 and NPE-225 Overview


This chapter describes the network processing engine (NPE) models NPE-175 and NPE-225 and contains the following sections:

Supported Platforms

Software Requirements

NPE-175 and NPE-225 Description and Overview

NPE-175 and NPE-225 Memory Information

Supported Platforms

The following NPEs support the Cisco 7200 series routers and Cisco 7200 VXR routers:

NPE-175

NPE-225

The following NPEs support the Cisco uBR7246VXR universal broadband router, Cisco uBR7246, and Cisco uBR7223 universal broadband routers:

NPE-175

NPE-225

Software Requirements

For minimum software release information, see the "Software Requirements" section on page 8-4.

NPE-175 and NPE-225 Description and Overview

This section contains information about the network processing engine components and the system management functions. The network processing engine maintains and executes the system management functions for the Cisco 7200 series and Cisco uBR7200 series routers. The NPE also shares the system memory and environmental monitoring functions with the I/O controller.

Components

Figure 2-1 NPE-175

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

RM5270 microprocessor

10

SDRAM DIMM (U15)


Figure 2-2 NPE-225

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)


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

Boot ROM for storing sufficient code for booting the Cisco IOS software; the NPE-175 and NPE-225 have boot ROM


Note Neither the NPE-175 nor the NPE-225 has packet SRAM.


System Management Functions

The network processing engines perform the following system management functions:

Sending and receiving routing protocol updates

Managing tables, caches, and buffers

Monitoring interface and environmental status

Providing Simple Network Management Protocol (SNMP) management through the console and Telnet interface

Accounting for and switching of data traffic

Booting and reloading images

Managing port adapters (including recognition and initialization during online insertion and removal)

Terms and Acronyms

Cache—Memory with fast access and small capacity used to temporarily store recently accessed data; found either incorporated into the processor or near it.

DIMM—dual in-line memory module

DRAM—dynamic random-access memory

Instruction and data cache—Instructions to the processor, and data on which the instructions work.

Integrated cache—Cache that is built into the processor; sometimes referred to as internal cache. Cache memory physically located outside the processor is not integrated, and is sometimes referred to as external cache.

OTP—one time programmable

Primary, secondary, tertiary cache—Hierarchical cache memory storage based on the proximity of the cache to the core of the processor. Primary cache is closest to the processor core and has the fastest access. Secondary cache has slower access than primary cache, but faster access than tertiary cache.

RAM—random-access memory

RISC—reduced instruction set computing

ROM—read-only memory

SIMM—single in-line memory module

SDRAM—synchronous dynamic random-access memory

SDRAM-fixed—SDRAM of a fixed size or quantity; can be replaced, but not upgraded

SODIMM—small outline dual in-line memory module

SRAM—static random-access memory

Unified cache— Instruction cache and data cache are combined. For example, a processor may have primary cache with separate instruction and data cache memory, but unified secondary cache.

NPE-175 and NPE-225 Memory Information

To determine the memory configuration of your NPE, use the show version command.

The following example shows an NPE-225 installed in a Cisco 7206VXR router:

router(boot)# show version
Cisco Internetwork Operating System Software 
IOS (tm) 7200 Software (C7200-BOOT-M), Released Version 12.0(19990124:222541) 
[biff-nightly 115]
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 15-Feb-99 21:50 by biff
Image text-base:0x600088F8, data-base:0x6064C000

  (display text omitted)

cisco 7206VXR (NPE225) processor with 57344K/8192K bytes of memory.
R527x CPU at 262Mhz, Implementation 40, Rev 10.0, 2048KB L2 Cache
6 slot VXR midplane, Version 2.0

  (display text omitted)

Table 2-1 provides memory specifications, Table 2-2 provides memory configurations for the NPE-175, and Table 2-3 provides memory configurations for the NPE-225.

Table 2-1 NPE-175 and NPE-225 Memory Specifications

Memory Type
Size
Quantity
Description
Component Location on the NPE-175 and NPE-225 Board

SDRAM

64 or 128 MB

1 configurable bank with 1 SDRAM slot

DIMM

U15

Boot ROM

512 KB

1

OTP ROM for the ROM monitor program

U1

Primary cache

16 KB (instruction),
16 KB (data)

RM5270 processor, primary internal cache

U4

 

32 KB (instruction),
32 KB (data)

RM5271 processor, primary internal cache

U4

Secondary cache

2 MB

4 x 256 x 18 bits = 64 bit plus 4 parity bits

RM527x processor, unified external cache

U5, U6, U7, U81

1 Located on the processor engine board.


Table 2-2 NPE-175 SDRAM DIMM Configurations—Configurable Memory Only

Total SDRAM
Bank
Quantity
Product Number

64 MB

U15

1 64-MB DIMM

MEM-SD-NPE-64MB

128 MB

U15

1 128-MB DIMM

MEM-SD-NPE-128MB


Table 2-3 NPE-225 SDRAM DIMM Configurations—Configurable Memory Only

Total SDRAM
Bank
Quantity
Product Number

64 MB

U15

1 64-MB DIMM

MEM-SD-NPE-64MB

128 MB

U15

1 128-MB DIMM

MEM-SD-NPE-128MB

256 MB

U15

1 256-MB DIMM

MEM-SD-NSE-256MB