Table of Contents
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NPE-175 and NPE-225 Description and Overview
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System Management Functions
The network processing engines perform the following system management functions:
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Terms and Acronyms
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Network Processing Engine and Network Services Engine Installation and Configuration
2-4
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.
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)
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
Chapter 2
NPE-175 and NPE-225 Overview
OL-4448-12
- Quick Links:
- Chapter 6 Npe-G2 Overview
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Table of Contents
Troubleshooting
