Cisco 3725 Hardware Installation Guide - Page 24

Memory Chapter 1 Overview of Cisco 3700 Series Routers For information on installing DRAM, SDRAM, NVRAM, and CompactFlash memory, see: • Upgrading System Memory in Cisco 3700 Series Routers • Installing Field-Replaceable Units in Cisco 3745 Routers For information on installing CompactFlash memory cards, see: • Installing and Formatting Cisco 2691, Cisco 3631, and Cisco 3700 CompactFlash Memory Cards Memory Cisco 3700 series routers support the following types of memory: • 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." CompactFlash memory-Stores the operating system software image. You can increase CompactFlash memory by adding Cisco 3700 CompactFlash memory cards. See the Installing and Formatting Cisco 3631 and Cisco 3700 CompactFlash Memory Cards document. • EPROM-based memory-Stores the ROM monitor, which allows you to boot an operating system software image from internal or external CompactFlash memory. Table 1-1 and Table 1-2 list processor and memory specifications for Cisco 3700 series routers. Table 1-1 Cisco 3725 Router Processor and Memory Specifications Description Processor SDRAM NVRAM CompactFlash Boot ROM Specification 240-MHz PMC-Sierra RM7061A RISC processor 128-256 MB 56 KB 32, 64, or 128 MB 512 KB Table 1-2 Cisco 3745 Router Processor and Memory Specifications Description Processor SDRAM NVRAM CompactFlash Boot ROM Specification 350-MHz PMC-Sierra RM7000A RISC processor 128-256 MB 152 KB 32, 64, or 128 MB 704 KB Cisco 3700 Series Routers Hardware Installation Guide 1-4 OL-2180-08