Cisco AS5350 - Universal Access Server Configuration Manual page 24

Exploring the Cisco IOS File System
Figure 1-2
Figure 1-2
Processor
Pocket I/O
Table 1-1
Component
CPU
Processor memory
Packet I/O memory
System Flash and boot Flash memory
NVRAM memory
Cisco AS5350 and Cisco AS5400 Universal Gateway Software Configuration Guide
1-4
illustrates the memory locations and
Cisco AS5350 and Cisco AS5400 Memory Locations
Inside a Cisco
network gateway
V
CPU System Flash
memory
(R7000)
Boot Flash
memory memory
NVRAM
memory memory
Memory Location Descriptions
Chapter 1 Understanding Basic Hardware Architecture and Cisco IOS Software
Table 1-1 describes the memory locations.
Description
250 MHz (Cisco AS5350 and Cisco AS5400)
390 MHz (Cisco AS5400HPX)
The Cisco IOS image is initially read out of Flash
memory, decompressed, and loaded into processor
memory (also known as main memory or DRAM).
Routing tables, call control blocks, and other data
structures are also stored here.
Packets are temporarily stored in I/O memory.
Memory that stores Cisco IOS images, modem
firmware/portware, and custom web pages.
Nonvolatile configuration memory that retains its
contents when a unit is powered off.
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