Cisco Systems 3745, 3600, 3725 User Manual

Upgrading System Memory in Cisco 3700 Series
Routers

Product Numbers:
MEM3725-32CF-INCL, MEM3725-32U64CF, MEM3725-32U128CF, MEM3725-32CF=, MEM3725-64CF=,
MEM3725-128CF=
MEM3725-64D=, MEM3725-128D=
MEM3745-256D-INCL, MEM3745-256D=, MEM3745-128CF=, MEM3745-128D-INCL, MEM3745-128D=,
MEM3745-128U192D, MEM3745-128U256D, MEM3745-256U512D, MEM3745-32CF-INCL, MEM3745-32CF=,
MEM3745-32U128CF, MEM3745-32U64CF, MEM3745-64CF=, MEM3745-64D=

This document describes how to upgrade the following in a Cisco 3700 series router:

• Synchronized dynamic random-access memory (SDRAM) dual in-line memory modules (DIMMs)

• Small-outline dual in-line memory modules (SODIMMs)

• Cisco 3700 CompactFlash memory cards.

Note In this document, the term “Cisco 3700 series” represents the following router models: Cisco 3725

router and Cisco 3745 router.

Use this document in conjunction with the following:

• Cisco 3700 Series Hardware Installation Guide and the Cisco 2600 Series, Cisco 3600 Series, and

Cisco 3700 Series Regulatory Compliance and Safety Information document for your router, both
available online at the following URL:

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

• 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/

comflash.htm

If you have questions or need help, see the “Obtaining Documentation” section on page 27 and the

“Obtaining Technical Assistance” section on page 28 for further information.

Corporate Headquarters:
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA

Copyright © 2004 Cisco Systems, Inc. All rights reserved.

Memory Capacities

This document contains the following sections:

• 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

Memory Capacities

You might need to upgrade memory for the following reasons:

• 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.

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 Tabl e 1 .

Table 1 Memory Capacities for Cisco 3700 Series Routers

Router DRAM Compact Flash Memory

Cisco 3725 256- (default) to 256-MB SDRAM DIMMs 32- (default) to 128-MB memory card

Cisco 3745 256- (default) to 512-MB SDRAM SODIMMs 32- (default) to 128-MB memory card

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

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.

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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.

Memory Configurations

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 Tab l e 2.

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Safety Recommendations

Table 2 SDRAM Configurations for Cisco 3700 Series Routers

Router DIMM or SODIMM 0 DIMM or SODIMM 1 Total Memory

3725/3745 128 MB (default) 128 MB (default) 256 MB

— 128 MB 128 MB

64 MB 128 MB 192 MB

128 MB 64 MB 192 MB

128 MB 128 MB 256 MB

3745 256 MB — 256 MB

— 256 MB 256 MB

64 MB 256 MB 320 MB

256 MB 64 MB 320 MB

128 MB 256 MB 384 MB

256 MB 128 MB 384 MB

256 MB 256 MB 512 MB

Compact Flash Memory

Cisco IOS software on Cisco 3700 series routers is stored in two CompactFlash memory cards—one
external and one internal. Memory cards come with 32-, 64-, or 128-MB of memory.

To determine how much compact flash memory is installed in your router, enter the show flash command
in EXEC mode.

Note To install a new CompactFlash memory card, 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

Safety Recommendations

Follow these guidelines to ensure general safety:

• Keep the chassis area clear and dust-free during and after installation.

• Place the removed chassis cover in a safe place.

• Keep tools away from walk areas where you or others could fall over them.

• Do not wear loose clothing that could get caught in the chassis. Fasten your tie or scarf and roll up

your sleeves.

• Wear safety glasses when working under any conditions that might be hazardous to your eyes.

• Do not perform any action that creates a potential hazard to people or makes equipment unsafe.

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Safety Warnings

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may
harm you. A warning symbol precedes each warning statement.

Warning Definition

Safety Recommendations

Warning

Waarschuwing

IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. To see translations of the warnings that appear in
this publication, refer to the translated safety warnings that accompanied this device.

Note: SAVE THESE INSTRUCTIONS

Note: This documentation is to be used in conjunction with the specific product installation guide
that shipped with the product. Please refer to the Installation Guide, Configuration Guide, or other
enclosed additional documentation for further details.

BELANGRIJKE VEILIGHEIDSINSTRUCTIES

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan
veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij
elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard
praktijken om ongelukken te voorkomen. Voor een vertaling van de waarschuwingen die in deze
publicatie verschijnen, dient u de vertaalde veiligheidswaarschuwingen te raadplegen die bij dit
apparaat worden geleverd.

Opmerking BEWAAR DEZE INSTRUCTIES.

Opmerking Deze documentatie dient gebruikt te worden in combinatie met de
installatiehandleiding voor het specifieke product die bij het product wordt geleverd. Raadpleeg de
installatiehandleiding, configuratiehandleiding of andere verdere ingesloten documentatie voor
meer informatie.

Statement 1020

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Varoitus

TÄRKEITÄ TURVALLISUUTEEN LIITTYVIÄ OHJEITA

Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen
kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja
tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä asiakirjassa esitettyjen varoitusten
käännökset löydät laitteen mukana toimitetuista ohjeista.

Huomautus SÄILYTÄ NÄMÄ OHJEET

Huomautus Tämä asiakirja on tarkoitettu käytettäväksi yhdessä tuotteen mukana tulleen
asennusoppaan kanssa. Katso lisätietoja asennusoppaasta, kokoonpano-oppaasta ja muista
mukana toimitetuista asiakirjoista.

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Safety Recommendations

Attention

Warnung

IMPORTANTES INFORMATIONS DE SÉCURITÉ

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer
des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient
des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment
utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements
figurant dans cette publication, consultez les consignes de sécurité traduites qui accompagnent cet
appareil.

Remarque CONSERVEZ CES INFORMATIONS

Remarque Cette documentation doit être utilisée avec le guide spécifique d'installation du produit
qui accompagne ce dernier. Veuillez vous reporter au Guide d'installation, au Guide de
configuration, ou à toute autre documentation jointe pour de plus amples renseignements.

WICHTIGE SICHERHEITSANWEISUNGEN

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer
Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie
sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur
Vermeidung von Unfällen bewusst. Übersetzungen der in dieser Veröffentlichung enthaltenen
Warnhinweise sind im Lieferumfang des Geräts enthalten.

Hinweis BEWAHREN SIE DIESE SICHERHEITSANWEISUNGEN AUF

Hinweis Dieses Handbuch ist zum Gebrauch in Verbindung mit dem Installationshandbuch für Ihr
Gerät bestimmt, das dem Gerät beiliegt. Entnehmen Sie bitte alle weiteren Informationen dem
Handbuch (Installations- oder Konfigurationshandbuch o. Ä.) für Ihr spezifisches Gerät.

Figyelem!

Avvertenza

FONTOS BIZTONSÁGI ELÕÍRÁSOK

Ez a figyelmezetõ jel veszélyre utal. Sérülésveszélyt rejtõ helyzetben van. Mielõtt bármely
berendezésen munkát végezte, legyen figyelemmel az elektromos áramkörök okozta kockázatokra,
és ismerkedjen meg a szokásos balesetvédelmi eljárásokkal. A kiadványban szereplõ
figyelmeztetések fordítása a készülékhez mellékelt biztonsági figyelmeztetések között található.

Megjegyzés ÕRIZZE MEG EZEKET AZ UTASÍTÁSOKAT!

Megjegyzés Ezt a dokumentációt a készülékhez mellékelt üzembe helyezési útmutatóval együtt kell
használni. További tudnivalók a mellékelt Üzembe helyezési útmutatóban (Installation Guide),
Konfigurációs útmutatóban (Configuration Guide) vagy más dokumentumban találhatók.

IMPORTANTI ISTRUZIONI SULLA SICUREZZA

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle
persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli
relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Per le
traduzioni delle avvertenze riportate in questo documento, vedere le avvertenze di sicurezza che
accompagnano questo dispositivo.

Nota CONSERVARE QUESTE ISTRUZIONI

Nota La presente documentazione va usata congiuntamente alla guida di installazione specifica
spedita con il prodotto. Per maggiori informazioni, consultare la Guida all'installazione, la Guida
alla configurazione o altra documentazione acclusa.

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Safety Recommendations

Advarsel

Aviso

VIKTIGE SIKKERHETSINSTRUKSJONER

Dette varselssymbolet betyr fare. Du befinner deg i en situasjon som kan forårsake personskade.
Før du utfører arbeid med utstyret, bør du være oppmerksom på farene som er forbundet med
elektriske kretssystemer, og du bør være kjent med vanlig praksis for å unngå ulykker. For å se
oversettelser av advarslene i denne publikasjonen, se de oversatte sikkerhetsvarslene som følger
med denne enheten.

Merk TA VARE PÅ DISSE INSTRUKSJONENE

Merk Denne dokumentasjonen skal brukes i forbindelse med den spesifikke
installasjonsveiledningen som fulgte med produktet. Vennligst se installasjonsveiledningen,
konfigureringsveiledningen eller annen vedlagt tilleggsdokumentasjon for detaljer.

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. O utilizador encontra-se numa situação que poderá ser
causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha em
atenção os perigos envolvidos no manuseamento de circuitos eléctricos e familiarize-se com as
práticas habituais de prevenção de acidentes. Para ver traduções dos avisos incluídos nesta
publicação, consulte os avisos de segurança traduzidos que acompanham este dispositivo.

Nota GUARDE ESTAS INSTRUÇÕES

Nota Esta documentação destina-se a ser utilizada em conjunto com o manual de instalação
incluído com o produto específico. Consulte o manual de instalação, o manual de configuração ou
outra documentação adicional inclusa, para obter mais informações.

¡Advertencia!

Varning!

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular
cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los
procedimientos estándar de prevención de accidentes. Vea las traducciones de las advertencias
que acompañan a este dispositivo.

Nota GUARDE ESTAS INSTRUCCIONES

Nota Esta documentación está pensada para ser utilizada con la guía de instalación del producto
que lo acompaña. Si necesita más detalles, consulte la Guía de instalación, la Guía de
configuración o cualquier documentación adicional adjunta.

VIKTIGA SÄKERHETSANVISNINGAR

Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada.
Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och
känna till vanliga förfaranden för att förebygga olyckor. Se översättningarna av de
varningsmeddelanden som finns i denna publikation, och se de översatta säkerhetsvarningarna som
medföljer denna anordning.

OBS! SPARA DESSA ANVISNINGAR

OBS! Denna dokumentation ska användas i samband med den specifika
produktinstallationshandbok som medföljde produkten. Se installationshandboken,
konfigurationshandboken eller annan bifogad ytterligare dokumentation för närmare detaljer.

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Safety Recommendations

Warning

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Warning

Ultimate disposal of this product should be handled according to all national laws and regulations.

Statement 1040

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Safety with Electricity

Safety Recommendations

Warning

Warning

Warning

Warning

Warning

Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.

Do not work on the system or connect or disconnect cables during periods of lightning activity.

Statement 1001

To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.

Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF
or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables,
detach the end away from the unit first.

Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV)
requirements in IEC 60950 based safety standards.

Statement 1037

Statement 1021

Statement 1021

Statement 1033

Follow these guidelines when working on equipment powered by electricity:

• Locate the emergency power-off switch in the room in which you are working. Then, if an electrical

accident occurs, you can quickly shut the power off.

• Before working on the router, turn off the power and unplug the power cord.

• Disconnect all power before doing the following:

–

Installing or removing a router chassis

–

Working near power supplies

–

Performing most hardware upgrades

• Do not work alone if potentially hazardous conditions exist.

• Never assume that power is disconnected from a circuit. Always check.

• Look carefully for possible hazards in your work area, such as moist floors, ungrounded power

extension cables, and missing safety grounds.

• If an electrical accident occurs, proceed as follows:

–

Use caution; do not become a victim yourself.

–

Turn off power to the router.

–

If possible, send another person to get medical aid. Otherwise, determine the condition of the
victim and then call for help.

–

Determine if the victim needs rescue breathing or external cardiac compressions; then take
appropriate action.

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