Memory - Cisco 3700 Series Hardware Installation Manual

Memory

For information on installing DRAM, SDRAM, NVRAM, and CompactFlash memory, see:
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For information on installing CompactFlash memory cards, see:
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Memory
Cisco 3700 series routers support the following types of memory:
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Table 1-1
Table 1-1
Description
Processor
SDRAM
NVRAM
CompactFlash
Boot ROM
Table 1-2
Description
Processor
SDRAM
NVRAM
CompactFlash
Boot ROM
Cisco 3700 Series Routers Hardware Installation Guide
1-4
Upgrading System Memory in Cisco 3700 Series Routers
Installing Field-Replaceable Units in Cisco 3745 Routers
Installing and Formatting Cisco 2691, Cisco 3631, and Cisco 3700 CompactFlash Memory Cards
SDRAM—Stores the running configuration and routing tables and is used for packet buffering by
the network interfaces. Cisco IOS software executes from SDRAM memory.
NVRAM—Stores the system configuration file and virtual configuration register. For more
information, see Appendix C, "Configuration Register."
operating system software image. You can increase CompactFlash memory by adding Cisco 3700
CompactFlash memory cards. See the
CompactFlash Memory Cards
EPROM-based memory—Stores the ROM monitor, which allows you to boot an operating system
software image from internal or external CompactFlash memory.
and Table 1-2 list processor and memory specifications for Cisco 3700 series routers.
Cisco 3725 Router Processor and Memory Specifications
Specification
240-MHz PMC-Sierra RM7061A RISC processor
128–256 MB
56 KB
32, 64, or 128 MB
512 KB
Cisco 3745 Router Processor and Memory Specifications
Specification
350-MHz PMC-Sierra RM7000A RISC processor
128–256 MB
152 KB
32, 64, or 128 MB
704 KB
CompactFlash memory—Stores the
Installing and Formatting Cisco 3631 and Cisco 3700
document.
Chapter 1 Overview of Cisco 3700 Series Routers
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