Chapter 1 Cisco XR 12410 Router Overview
Line Card and Route Processor Overview
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.
| Cisco XR 12410 Router Installation Guide |
