Chapter 1 Cisco XR 12404 Router Overview
Route Processor
PRP Memory Components
This section describes various types of memory used on the PRP to support router functions. Table
Table | PRP Memory Components |
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Type | Size | Quantity | Description | Location |
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SDRAM | 512 MB1, | 1 or 2 | Uses 512 MB or 1 GB DIMMs (based on | U15 (bank 1) |
| 1 GB, or 2 GB |
| SDRAM configuration) for main | U18 (bank 2) |
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| Cisco IOS XR software functions |
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SRAM | 2 MB (fixed) | — | Secondary CPU cache memory functions | — |
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NVRAM | 2 MB (fixed) | — | System configuration files, register settings, | — |
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| and logs |
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Flash | 64 MB SIMM | 1 | Cisco IOS XR boot image (bootflash), crash | P3 |
memory |
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| information, and other |
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Flash disk | 64 MB1 | 1 or 2 | Cisco IOS XR software images, system | Flash memory |
(PCMCIA) |
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| configuration files, and other | card slot 0 and |
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| files on one or two Flash memory cards | slot 1 |
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Flash boot | 512 KB | 1 | Flash EPROM for the ROM monitor program | — |
ROM |
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| boot image |
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1. Default shipping configuration.
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| Cisco XR 12404 Router Installation Guide |
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