Cisco 7200 VXR User Manual page 16
Hide thumbs
Also See for 7200 VXR:
- User manual (178 pages) ,
- Product overview (64 pages) ,
- Quick start manual (48 pages)
Table of Contents
Advertisement
Field-Replaceable Units
•
•
Cisco 7200 VXR Installation and Configuration Guide
1-16
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.
The NPE-175 and NPE-225 use SDRAM for providing code, data, and
–
packet storage.
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-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 NSE-1 uses SDRAM for providing code, data, and packet storage.
Packet SRAM for storing packets of information in preparation for fast
switching
–
The NPE-100 does not have packet SRAM.
The NPE-150 has 1 MB of SRAM.
–
The NPE-175 does not have packet SRAM.
–
The NPE-200 has 4 MB of SRAM.
–
The NPE-225 does not have packet SRAM.
–
–
The NPE-300 does not have packet SRAM.
The NPE-400 does not have packet SRAM.
–
–
The NSE-1 does not have packet SRAM.
Cache memory
The NPE-100, NPE-150, and NPE-200 have unified cache SRAM that
–
functions as the secondary cache for the microprocessor. (The primary
cache is within the microprocessor.)
The NPE-175 and NPE-225 have two levels of cache: a primary cache
–
that is internal to the processor and a secondary, 2-MB external cache
that provides additional high-speed storage for data and instructions.
Chapter 1
Cisco 7200 VXR Product Overview
78-5469-03
Advertisement
Table of Contents
