Table Of Contents - Cisco 3600 Series Upgrade Instructions

Memory Capacities
This document contains the following sections:
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Memory Capacities
You might need to upgrade memory for the following reasons:
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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
2
Memory Capacities, page 2
Memory Configurations, page 3
Safety Recommendations, page 4
Tools and Equipment Needed, page 10
Upgrading System Memory in Cisco 3725 Routers, page 10
Upgrading System Memory in Cisco 3745 Routers, page 17
Recovering Compact Flash Memory and System Images, page 27
Obtaining Documentation, page 27
Documentation Feedback, page 28
Obtaining Technical Assistance, page 28
Obtaining Additional Publications and Information, page 29
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 1.
Compact Flash Memory
32- (default) to 128-MB memory card
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