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Cisco Systems 3600 Series, 3725 Series, 3745 Series manual Memory Configurations, Dynamic Memory

Models: 3745 Series 3725 Series 3600 Series

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Memory Configurations

Memory Configurations

Memory Configurations

For information on configuring dynamic memory and compact flash memory, see the following sections.

Dynamic Memory

You can configure dynamic memory (SDRAM) as a mixture of primary or main memory that is reserved for the CPU and shared memory that is used for data transmitted or received by modules and WAN interface cards.

To examine current dynamic memory status or reconfigure memory allocation, do the following, as appropriate:

Step 1 To see how much memory is currently installed in your router, enter the show version command in EXEC mode. Near the middle of the resulting output, locate a message similar to the following:

Cisco XXXX processor (revision X) with 24576K/8192K bytes of memory.

This line shows how much memory is installed (in this example, 24576K/8192K). The first number represents primary memory; the second number represents shared memory.

Step 2 To configure the proportion of SDRAM devoted to main memory and to shared memory, enter the memory-size iomem command in global configuration mode.

Note For information about these and related commands, refer to the Cisco IOS configuration guides and command references. See the “Obtaining Documentation” section on page 27 for information about these publications.

Dynamic memory resides in one or two sockets in the router chassis. A socket corresponds to one bank of memory. Cisco 3700 series router sockets are as follows:

•Cisco 3725: Two sockets, each of which can support one SDRAM DIMM or be left empty; sockets can be filled in any order

•Cisco 3745: One socket that can support two SDRAM SODIMMs, one on top of the other

SDRAM DIMM and SODIMM sizes allowed in each router type, and the total memory capacity resulting from insertion of one or two DIMMs or SODIMMs, are shown in Table 2.

Upgrading System Memory in Cisco 3700 Series Routers

	OL-5423-02	3

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Cisco Systems 3600 Series, 3725 Series, 3745 Series manual Memory Configurations, Dynamic Memory

Contents

Product Numbers MEM3725-64D=, MEM3725-128D=Upgrading System Memory in Cisco 3700 Series Routers Memory Capacities Memory Capacities, page Memory Configurations, pageSafety Recommendations, page Tools and Equipment Needed, page Recovering Compact Flash Memory and System Images, pageDynamic Memory Memory ConfigurationsTotal Memory Safety RecommendationsCompact Flash Memory DIMM or SODIMMNote SAVE THESE INSTRUCTIONS Safety WarningsWarning IMPORTANT SAFETY INSTRUCTIONS Warning DefinitionHinweis BEWAHREN SIE DIESE SICHERHEITSANWEISUNGEN AUF Attention IMPORTANTES INFORMATIONS DE SÉCURITÉRemarque CONSERVEZ CES INFORMATIONS Warnung WICHTIGE SICHERHEITSANWEISUNGENNota GUARDE ESTAS INSTRUÇÕES Advarsel VIKTIGE SIKKERHETSINSTRUKSJONERMerk TA VARE PÅ DISSE INSTRUKSJONENE Aviso INSTRUÇÕES IMPORTANTES DE SEGURANÇAWarning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement Safety with Electricity Tools and Equipment Needed Upgrading System Memory in Cisco 3725 RoutersPreventing Electrostatic Discharge Damage Removing the Cisco 3725 Router Cover SDRAM DIMM Location and Orientation Replacing Cisco 3725 SDRAMRemoving SDRAM DIMMs Figure 2 SDRAMM DIMM Locations in the Cisco 3725 RouterFigure 3 SDRAM DIMM Orientation in the Cisco 3725 Router Step 5 If necessary, repeat Step 3 and Step 4 for the other DIMM Step 6 Proceed to the “Installing SDRAM DIMMs” section on page“Replacing the Cisco 3725 Cover” section on page Installing SDRAM DIMMsReplacing CompactFlash Memory Cards “Replacing CompactFlash Memory Cards” section on pageReplacing the Cisco 3725 Cover Upgrading System Memory in Cisco 3745 Routers Replacing Connections to the RouterRemoving the Cisco 3745 Mainboard Tray OL-5423-02 Figure 6 Captive Screws on a Cisco 3745 RouterUpgrading System Memory in Cisco 3745 Routers Upgrading System Memory in Cisco 3700 Series RoutersFigure 7 Removing the Front Panel from a Cisco 3745 Router HingesFan tray SDRAM SODIMM Location and Orientation Replacing Cisco 3745 SDRAMFigure 9 SDRAMM SODIMM Location in the Cisco 3745 Router Removing SDRAM SODIMMsInstalling SDRAM SODIMMs Step 6 Proceed to the “Installing SDRAM DIMMs” section on pageMemory module “Replacing CompactFlash Memory Cards” section on page “Replacing the Cisco 3745 Mainboard” section on pageReplacing CompactFlash Memory Cards Step 7 Proceed to either of the following as appropriateReplacing the Cisco 3745 Mainboard Front panel Figure 13 Installing the Front Panel on a Cisco 3745 RouterAccess door HingesFigure 14 Captive Screws on a Cisco 3745 Router Replacing Connections to the RouterRecovering Compact Flash Memory and System Images Using the xmodem CommandObtaining Documentation Cisco.comCisco Technical Support Website Documentation FeedbackObtaining Technical Assistance Ordering DocumentationSubmitting a Service Request Definitions of Service Request SeverityObtaining Additional Publications and Information http//cisco.com/univercd/cc/td/doc/pcat