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 rou
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 • Obtain
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.
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 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 3745 Compact Flash Memory Cisco IOS software on Cisco 3700 series ro
Safety Recommendations 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.
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.
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.
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.
Safety Recommendations Safety with Electricity Warning Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface. Statement 1037 Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001 Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits.
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. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact.
Upgrading System Memory in Cisco 3725 Routers Removing the Cisco 3725 Router Cover To remove the router cover, 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. Step 2 Turn off the power and unplug the power cord.
Upgrading System Memory in Cisco 3725 Routers Figure 1 Removing the Cover from a Cisco 3725 Router 2 62488 1 Step 8 When you are ready to replace the cover, see the “Replacing the Cisco 3725 Cover” section on page 16. 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.
Upgrading System Memory in Cisco 3725 Routers Figure 2 SDRAMM DIMM Locations in the Cisco 3725 Router 68522 0 1 SDRAM DIMM Orientation in the Cisco 3725 Router 68543 Figure 3 Connector edge Polarization notches Alignment holes Removing SDRAM DIMMs To remove SDRAM DIMMs, follow these steps: Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin.
Upgrading System Memory in Cisco 3725 Routers Caution Step 3 Handle the DIMM by the nonconnector edges only; do not press on the center. Handle carefully. DIMMs 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 from its socket. (See Figure 4.
Upgrading System Memory in Cisco 3725 Routers 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. Step 2 On the mainboard, locate the SDRAM DIMM sockets. (See Figure 2.) Caution Handle the DIMM by the nonconnector edges only; do not press on the center.
Upgrading System Memory in Cisco 3725 Routers Replacing the Cisco 3725 Cover To replace the router cover, follow these steps: Step 1 Place the chassis so that the front panel faces you. Make sure that all cables are securely tucked in and are not in danger of being stressed or cut. Step 2 Hold the cover at a 45-degree angle, and insert the tabs into the slots along the front (bezel) edge of the chassis to engage the hinges. (See Figure 5 part 1.
Upgrading System Memory in Cisco 3745 Routers Replacing Connections to the Router To make final connections to the router, follow these steps: Warning Read the installation instructions before connecting the system to the power source. Statement 1004 Step 1 Replace all network connections. Step 2 Do one of the following: • AC-powered router: Plug the power cord into a 3-terminal, single-phase power source that provides power within the acceptable range (100 to 240 VAC, 50 to 60 Hz).
Upgrading System Memory in Cisco 3745 Routers Captive Screws on a Cisco 3745 Router 72114 Figure 6 Upgrading System Memory in Cisco 3700 Series Routers 18 OL-5423-02
Upgrading System Memory in Cisco 3745 Routers Step 5 Open the front panel to the straight-out position and lift it off its hinges. (See Figure 7 parts 1 and 2.) Removing the Front Panel from a Cisco 3745 Router 62481 Figure 7 Hinges 1 2 Access door Fan tray Step 6 Loosen the two captive retention screws, one on either side of the motherboard. (See Figure 8.) Step 7 Pull the ejector levers at both sides, and carefully pull the mainboard straight out of the chassis.
Upgrading System Memory in Cisco 3745 Routers Figure 8 Removing the Mainboard Tray from a Cisco 3745 Router 72135 Captive retention screw Captive retention screw Caution Step 8 Ejector levers The mainboard is an ESD-sensitive component. To avoid damage, observe all ESD precautions. When you are ready to replace the mainboard tray, see the “Replacing the Cisco 3745 Mainboard” section on page 24.
Upgrading System Memory in Cisco 3745 Routers Figure 9 SDRAMM SODIMM Location in the Cisco 3745 Router 72132 SODIMM Plug-in mainboard Removing SDRAM SODIMMs To remove SDRAM SODIMMs, 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. Step 2 On the mainboard, locate the SDRAM SODIMM socket. (See Figure 9.
Upgrading System Memory in Cisco 3745 Routers Figure 10 Removing and Installing SDRAM SODIMMs in the Cisco 3745 Router Pull the tabs away with your thumbs, bracing your forefingers against the rails. The memory module will pop loose. Then raise the memory module to a vertical position. 48065 Memory module 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.
Upgrading System Memory in Cisco 3745 Routers Step 3 Hold the SODIMM component-side up, with connector edge (the metal fingers) away from you. Keep 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 33115 Figure 11 Step 4 Tilt the SODIMM to the same angle as the socket, then insert the connector edge into the socket. Gently push into place until the plastic clips snap into place.
Upgrading System Memory in Cisco 3745 Routers Replacing the Cisco 3745 Mainboard To replace the mainboard, follow these steps: Step 1 Place the chassis so that the empty mainboard slot faces you. Step 2 With the ejector levers fully open, carefully insert the mainboard tray into the chassis slot until the connector is engaged. (See Figure 12.
Upgrading System Memory in Cisco 3745 Routers Installing the Front Panel on a Cisco 3745 Router 62782 Figure 13 Hinges 2 Access door 1 Front panel Step 6 Tighten the two captive screws behind the small access door at the right-hand edge. (See Figure 14.
Upgrading System Memory in Cisco 3745 Routers Captive Screws on a Cisco 3745 Router 72114 Figure 14 Step 7 Reinstall the chassis on a rack or desktop. Step 8 Proceed to the “Replacing Connections to the Router” section on page 26. Replacing Connections to the Router To make final connections to the router, follow these steps: Step 1 Replace all network connections.
Recovering Compact Flash Memory and System Images Recovering Compact Flash Memory and System Images If you have increased system compact flash memory or reduced DRAM or SDRAM in a Cisco 3700 series router, you might need to reload the Cisco IOS image, using the xmodem command in ROM monitor mode. To use this command, the computer attached to your console must have a terminal emulator that has xmodem capability.
Documentation Feedback Ordering Documentation You can find instructions for ordering documentation at this URL: http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm You can order Cisco documentation in these ways: • Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Ordering tool: http://www.cisco.com/en/US/partner/ordering/index.shtml • Nonregistered Cisco.
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.
Obtaining Additional Publications and Information • The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as ordering and customer support services. Access the Cisco Product Catalog at this URL: http://cisco.com/univercd/cc/td/doc/pcat/ • Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications.
