Cisco Internet Router 12404 Technical Specifications page 14

Product Architecture
Table A-7 PRP Memory Components
Type Size
1
SDRAM 512 MB, 1 GB,
or 2 GB
2
SRAM 2 MB (fixed)
3
NVRAM 2 MB (fixed)
Flash Memory 64 MB SIMM
Flash Memory 20 MB
(card)
Flash boot 512 KB
ROM
1. Default SDROM configuration is 512 MB. Bank 1 (U15) must be populated first. You can use one or both banks to configure
SDRAM combinations of 512 MB, 1 GB, or 2 GV. 1.5-GB configurations are not supported.
2. SRAM is not user configurable or field replaceable.
3. NVRAM is not user configurable or field replaceable.
4. Flash memory SIMM is not user configurable or field replaceable.
5. ATA Flash disks, and Type I and Type II linear Flash memory cards are supported.
Cisco 12404 Internet Router Installation and Configuration Guide
A-14
Quantity
1 or 2
1
4
1
5
Up to 2
1
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 up to two (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.
The Cisco 12404 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. See
Description
512-MB or 1-GB DIMMs (based on SDRAM required)
for main Cisco IOS software functions.
Secondary CPU cache memory functions.
Nonvolatile random-access memory (NVRAM) for the
system configuration file.
Contains Cisco IOS software images and other
user-defined files on the PRP.
Contains Cisco IOS software images and other
user-defined files on up to two PCMCIA-based Flash
memory cards.
Flash EPROM for the ROM monitor program boot
image.
Figure A-3.
Appendix A Technical Specifications
OL-11636-01