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Memory Capacities

This document contains the following sections:

•

Memory Capacities

You might need to upgrade memory for the following reasons:

•

This document describes how to upgrade both dynamic memory and compact flash memory. Cisco 3700

series routers use dynamic memory in the form of SDRAM DIMMs (Cisco 3725 router) or SDRAM

SODIMMs (Cisco 3745 router). Memory capacities are shown in

Table 1

Router

Cisco 3725

Cisco 3745

This document discusses how to replace dynamic memory only. To learn how to replace CompactFlash

Note

memory cards, refer to Installing and Formatting Cisco 2691, Cisco 3631, and Cisco 3700 Series

CompactFlash Memory Cards, available online at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/hw_inst/hw_notes/

index.htm.

Upgrading System Memory in Cisco 3700 Series Routers

Memory Capacities, page 2

To upgrade to a new Cisco IOS feature set or release that requires additional memory. (Memory

requirements for each feature set and release are available in the release notes for that release.)

To use very large routing tables, many protocols (as may be required, for example, when the router

is part of both a large external network and your internal network), or other memory-intensive

features such as spoofing or protocol translations.

Memory Capacities for Cisco 3700 Series Routers

DRAM

256- (default) to 256-MB SDRAM DIMMs

256- (default) to 512-MB SDRAM SODIMMs 32- (default) to 128-MB memory card

Table

Compact Flash Memory

32- (default) to 128-MB memory card

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