Router Installation Guide

Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
4-20
Cisco XR 12410 Router Installation Guide
OL-13832-01
PRP Memory Components
This section describes types of memory used on the PRP to support router
functions.
Table 4-2 provides a quick reference of the different types of memory,
and Figure 4-6 shows the location on the PRP board.
Ta b l e 4-2 PRP Memory Components
Type Size Quantity Description Location
SDRAM 512 MB
1
,
1 GB, or 2 GB
1. Default shipping configuration.
1 or 2 Uses 512 MB or 1 GB DIMMs (based on
SDRAM configuration) for main Cisco IOS
XR software functions
U15 (bank 1)
U18 (bank 2)
SRAM 2 MB (fixed) — Secondary CPU cache memory functions —
NVRAM 2 MB (fixed) — System configuration files, register settings,
and logs
—
Flash
memory
64 MB SIMM 1 Cisco IOS XR boot image (bootflash), crash
information, and other user-defined files
P3
Flash disk
(PCMCIA)
64 MB
1
1 or 2 Cisco IOS XR software images, system
configuration files, and other user-defined
files on one or two flash memory cards
Flash memory
card slot 0 and
slot 1
Flash boot
ROM
512 KB 1 Flash EPROM for the ROM monitor program
boot image
—