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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.
In this document, the term "Cisco 3700 series" represents the following router models: Cisco 3725
Note
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 Technical Assistance" section on page 28
Corporate Headquarters:
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
Copyright © 2004 Cisco Systems, Inc. All rights reserved.
"Obtaining Documentation" section on page 27
for further information.
and the

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   Summary of Contents for Cisco 3600 Series

  • Page 1 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: •...
  • Page 2: Table Of Contents

    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 •...
  • Page 3: 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.
  • Page 4: Safety Recommendations

    Safety Recommendations Table 2 SDRAM Configurations for Cisco 3700 Series Routers Router 3725/3745 3745 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.
  • Page 5: Safety Warnings

    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 Warning 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.
  • Page 6 Safety Recommendations Attention 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.
  • Page 7 Safety Recommendations Advarsel 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.
  • Page 8 Safety Recommendations Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030 Ultimate disposal of this product should be handled according to all national laws and regulations. Warning Statement 1040 Upgrading System Memory in Cisco 3700 Series Routers OL-5423-02...
  • Page 9: Safety With Electricity

    Safety with Electricity Never touch uninsulated telephone wires or terminals unless the telephone line has been Warning disconnected at the network interface. Statement 1037 Do not work on the system or connect or disconnect cables during periods of lightning activity. Warning Statement 1001 To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network...
  • Page 10: Tools And Equipment Needed

    Tools and Equipment Needed Preventing Electrostatic Discharge Damage Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD can occur when electronic printed circuit cards are improperly handled, and can result in complete or intermittent failures. Always follow ESD-prevention procedures when removing and replacing cards. Ensure that the router chassis is electrically connected to earth ground.
  • Page 11 Removing the Cisco 3725 Router Cover To remove the router cover, follow these steps: Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the Step 1 equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the connectors.
  • Page 12 Upgrading System Memory in Cisco 3725 Routers Figure 1 Removing the Cover from a Cisco 3725 Router Step 8 When you are ready to replace the cover, see the Replacing Cisco 3725 SDRAM SDRAM DIMM Location and Orientation Figure 2 shows the location of dynamic memory—SDRAM DIMM sockets 0 and 1—in a Cisco 3725 router.
  • Page 13: Removing Sdram Dimms

    Figure 2 SDRAMM DIMM Locations in the Cisco 3725 Router Figure 3 SDRAM DIMM Orientation in the Cisco 3725 Router Removing SDRAM DIMMs To remove SDRAM DIMMs, follow these steps: Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the Step 1 equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the connectors.
  • Page 14 Upgrading System Memory in Cisco 3725 Routers Handle the DIMM by the nonconnector edges only; do not press on the center. Handle carefully. DIMMs Caution are ESD-sensitive components and can be damaged by mishandling. Remove the DIMM by pushing the locking spring clips on both sides outward. This ejects the DIMM Step 3 from its socket.
  • Page 15: Installing Sdram Dimms

    Installing SDRAM DIMMs To install SDRAM DIMMs, follow these steps: Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the connectors.
  • Page 16 Upgrading System Memory in Cisco 3725 Routers Replacing the Cisco 3725 Cover To replace the router cover, follow these steps: Place the chassis so that the front panel faces you. Make sure that all cables are securely tucked in and Step 1 are not in danger of being stressed or cut.
  • Page 17: Upgrading System Memory In Cisco 3745 Routers

    Replacing Connections to the Router To make final connections to the router, follow these steps: Read the installation instructions before connecting the system to the power source. Statement 1004 Warning Replace all network connections. Step 1 Do one of the following: Step 2 AC-powered router: Plug the power cord into a 3-terminal, single-phase power source that •...
  • Page 18 Upgrading System Memory in Cisco 3745 Routers Figure 6 Captive Screws on a Cisco 3745 Router Upgrading System Memory in Cisco 3700 Series Routers OL-5423-02...
  • Page 19 Open the front panel to the straight-out position and lift it off its hinges. (See Step 5 Figure 7 Removing the Front Panel from a Cisco 3745 Router Hinges Loosen the two captive retention screws, one on either side of the motherboard. (See Step 6 Pull the ejector levers at both sides, and carefully pull the mainboard straight out of the chassis.
  • Page 20 Upgrading System Memory in Cisco 3745 Routers Figure 8 Removing the Mainboard Tray from a Cisco 3745 Router The mainboard is an ESD-sensitive component. To avoid damage, observe all ESD precautions. Caution When you are ready to replace the mainboard tray, see the Step 8 section on page Replacing Cisco 3745 SDRAM...
  • Page 21 Figure 9 SDRAMM SODIMM Location in the Cisco 3745 Router Removing SDRAM SODIMMs To remove SDRAM SODIMMs, follow these steps: Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the Step 1 equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the connectors.
  • Page 22 Upgrading System Memory in Cisco 3745 Routers Figure 10 Removing and Installing SDRAM SODIMMs in the Cisco 3745 Router Step 4 When both ends of the SODIMM are released from the socket, grasp the ends of the SODIMM with your thumb and forefinger and pull it completely out of the socket.
  • Page 23: Replacing Compactflash Memory Cards

    Hold the SODIMM component-side up, with connector edge (the metal fingers) away from you. Keep Step 3 the sides of the SODIMM between your thumb and middle finger, with your forefinger against the far edge and opposite the connector edge. (See Figure 11 Handling a SODIMM Tilt the SODIMM to the same angle as the socket, then insert the connector edge into the socket.
  • Page 24 Upgrading System Memory in Cisco 3745 Routers Replacing the Cisco 3745 Mainboard To replace the mainboard, follow these steps: Place the chassis so that the empty mainboard slot faces you. Step 1 With the ejector levers fully open, carefully insert the mainboard tray into the chassis slot until the Step 2 connector is engaged.
  • Page 25 Upgrading System Memory in Cisco 3745 Routers Figure 13 Installing the Front Panel on a Cisco 3745 Router Hinges Access door Front panel Tighten the two captive screws behind the small access door at the right-hand edge. (See Figure 14.) Step 6 Upgrading System Memory in Cisco 3700 Series Routers OL-5423-02...
  • Page 26 Upgrading System Memory in Cisco 3745 Routers Figure 14 Captive Screws on a Cisco 3745 Router Reinstall the chassis on a rack or desktop. Step 7 Proceed to the Step 8 Replacing Connections to the Router To make final connections to the router, follow these steps: Replace all network connections.
  • Page 27: Recovering Compact Flash Memory And System Images

    To use this command, the computer attached to your console must have a terminal emulator that has xmodem capability. For complete information about ROM monitor commands, refer to Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers, available online at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/index.htm...
  • Page 28: Documentation Feedback

    Nonregistered Cisco.com users can order documentation through a local account representative by • calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387). Documentation Feedback You can send comments about technical documentation to bug-doc@cisco.com.
  • Page 29: Obtaining Additional Publications And Information

    Submitting a Service Request Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool automatically provides recommended solutions.
  • Page 30 CCSP, the Cisco Square Bridge logo, Cisco Unity, Follow Me Browsing, FormShare, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Aironet, ASIST, BPX, Catalyst, CCDA,...

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