Cisco XR 12816 Installationshandbuch - Seite 29

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Chapter 1
Product Overview

PRP Memory Components

Table 1-3
PRP-2 Memory Components
Type
Size
1
SDRAM
2 GB (default)
or 4 GB
(optional)
3
SRAM
2 MB (fixed)
4
NVRAM
2 MB (fixed)
HDD
40 GB
Flash
2 GB or 4 GB
memory
(optional)
Compact
Flash
4 MB Boot
ROM
Flash disks
GB (default)
or 4 GB
(optional)
1 GB CF
1. Default SDRAM configuration is 2-GB for PRP-2. Bank 1 (U15) must be populated first. You can use one or both banks to
configure SDRAM combinations of 2 GB and 4 GB for the PRP-2. 1.5-GB configurations.and DIMM devices that are not
from Cisco are not supported.
2. If both banks of the PRP-2 are populated, bank 1 and bank 2 must contain the same size DIMM.
3. SRAM is not user configurable or field replaceable.
4. NVRAM is not user configurable or field replaceable.
5. ATA Flash disks are supported in the PRP-2.
6. Optional PRP-2 hardware. Compact disks that are not from Cisco are not supported.
OL-17440-01
This section describes various types of memory used on the PRP to support router
functions.
Table 1-3
provides a quick reference of the different types of memory,
and
Figure 1-16
shows the location on the PRP board.
Quantity Description
1 or 2
2-GB or 4-GB DIMMs (based on desired
SDRAM configuration) for main Cisco IOS
XR software functions
—
Secondary CPU cache memory functions
1
System configuration files, register settings,
and logs
1
Contains log and crash information for
specific Cisco IOS XR versions.
1
Contains Cisco IOS XR boot image
(bootflash), crash information, and other
user-defined files
1
Stores the ROMMON minimum boot image
(MBI).
5
2
1 or 2
Contains Cisco IOS XR software images,
system configuration files, and other
user-defined files on up to two flash disks
6
1
Contains large Cisco IOS XR software
images
Cisco XR 12416 and Cisco XR 12816 Router Chassis Installation Guide
Route Processor
Location
2
U15 (bank 1)
U18 (bank 2)
—
—
—
P3
—
Flash disk
slot 0 and
slot 1
—
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