Cisco 12404 Installation And Configuration Manual page 267

Appendix A Technical Specifications
SDRAM
Caution
.
SRAM
OL-11636-01
SDRAM—The SDRAM on the PRP stores routing tables, protocols, and network
accounting applications; it also runs the Cisco IOS software. The default PRP
configuration includes 512 MB of error checking and correction (ECC) SDRAM.
DIMM upgrades of 512 MB and 1 GB are available. You cannot mix memory
sizes. If two DIMMS are installed, they must be the same memory size. Supported
memory configurations are listed in
Cisco strongly recommends that you use only Cisco-approved memory. To
prevent memory problems, SDRAM DIMMs must be +3.3VDC,
PC133-compliant devices. Do not attempt to install other devices in the DIMM
sockets.
Table A-8 Supported PRP Route Memory Configurations
Total Route Memory
1
512 MB
1 GB
1 GB
3
1.5 GB
2 GB
1. One 512-MB DIMM is the default shipping configuration.
2. Upgrades PRP to 1 GB by adding a second 512-MB DIMM.
3. This memory size is not supported.
The SRAM provides secondary CPU cache memory. The standard PRP
configuration is 2 MB. The principle function of SRAM is to act as a staging area
for routing table update information to and from the line cards. SRAM is not able
to be upgraded or configured.
Cisco 12404 Internet Router Installation and Configuration Guide
Table A-8.
Cisco Product Number
—
2
MEM-PRP-512=
MEM-PRP-1G=
—
NA
Product Architecture
DIMM Modules
1 512-MB DIMM
2 512-MB DIMMs
1 1-GB DIMM
—
2 1-GB DIMMs
A-15