Chapter 1 Product Overview
Route Processors
1-14
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
The PRP front view is shown in
.
Figure 1-6
Performance Route Processor—Front View
PRP Memory
The Cisco IOS software images that run the Cisco 12404 router reside in Flash
memory, which is located on the PRP in the form of a single in-line memory
module (SIMM), and on the PCMCIA cards, called Flash memory cards that
insert in the two PCMCIA slots on the front of the PRP. Storing the Cisco IOS
images in Flash memory enables you to download and boot from upgraded Cisco
IOS images remotely or from software images resident in PRP Flash memory.
Note
The Cisco 12404 router is shipped with 20 MB of Flash memory as the default
configuration.
PRP memory components are presented in the following sections.
•
SDRAM—Synchronous Dynamic Random Access Memory
•
DIMM—Dual In-line Memory Module
•
SRAM—Static Random Access Memory
•
NVRAM—Non-Volatile Random Access Memory
•
Flash Memory:
–
SIMM—Single Inline Memory Module
–
ROM—Read Only Memory
–
PCMCIA—Personal Computer Memory Card International Association
cards or Flash memory cards.
The router supports system software downloads for most Cisco IOS software
upgrades, which enables you to remotely download, store, and boot from a new
Cisco IOS image.
EJECT
RX
TX
PRIMARY
SLO
T-1
SLO
T-0
LINK
EN
RX
TX
ETH 1
ETH 0
AUX
CONSOLE
PERFORMANCE ROUTE PROCESSOR 1 (PRP-1)
LINK
PRIMARY
EN
RESET
75041
todd.book Page 14 Tuesday, November 27, 2007 6:02 PM
