Table Of Contents
Installing SODIMM Memory Modules in Cisco Network Modules for Caching and Content Delivery
Product Number: MEM-CE-256D=
This document describes how to install small-outline, synchronous dynamic random-access memory, dual inline memory modules (SO DRAM DIMMs, or SODIMMs) in Cisco network modules that provide caching and content delivery. These include Cisco network module NM-CE-BP with any of the following expansion modules installed:
•EM-CE-20G= or EM-CE-40G= with disk drive
•EM-CE-SCSI= with SCSI controller
Use this document with the Installing Expansion Modules on Cisco CE Network Modules for Caching and Content Delivery document, which you can access as follows:
•From Cisco.com at http://www.cisco.com, select Products & Services > Interfaces and Modules > Network Modules > Instructions and Guides > Module Installation Guides > Installing Expansion Modules on Cisco CE Network Modules for Caching and Content Delivery
•On the Documentation CD-ROM or on the previous Cisco website, navigate to the following URL:
If you have questions or need help, see the "Obtaining Documentation" section.
This document contains the following sections:
Preventing Electrostatic Discharge Damage
Memory SODIMMs are sensitive to electrostatic discharge (ESD) damage. ESD damage, which can occur when electronic cards or components are handled improperly, results in complete or intermittent failures.
To prevent ESD damage, follow these guidelines:
•Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
•Connect the equipment end of the strap to an unfinished chassis surface.
•Place a removed memory SODIMM on an antistatic surface or in a static shielding bag. If the memory SODIMM will be returned to the factory, immediately place it in a static shielding bag.
•Avoid contact between the memory SODIMM and clothing. The wrist strap protects the memory SODIMM from ESD voltages on the body only; ESD voltages on clothing can still cause damage.
•Do not remove the wrist strap until the installation is complete.
Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megohms (Mohms).
Tools and Equipment Needed
You need the following tools and equipment to remove and install memory SODIMMs:
•ESD-preventive wrist strap
•Antistatic bag or mat
•Number 2 Phillips screwdriver
•Small flat-blade screwdriver
Installing a Memory SODIMM
To install a memory SODIMM, you need to remove the network module from the router chassis and then remove the expansion module from the network module.
To install a memory SODIMM, complete the following procedure.
Step 1 If the network module contains an expansion module with a small computer systems interface (SCSI) controller, disconnect the cable from the front of the network module.
Step 2 Remove the network module from the router chassis (refer to the Cisco Network Modules Hardware Installation Guide).
Caution If your router is a Cisco 2600 series, Cisco 3620, or Cisco 3640, you must turn off the power to the router before you remove the network module, as described in the "Installing Network Modules" chapter of the Cisco Network Modules Hardware Installation Guide. Cisco 3660 and Cisco 3700 series routers support hot swapping of network modules, so you can remove network modules from those routers without turning off the power.
Step 3 Place the network module on an ESD-protected surface.
Caution Minimize contact with the bottom of the network module to avoid damage to components located on the bottom of the card.
Step 4 If the network module contains an expansion module with a SCSI controller, use a small flat-blade screwdriver to remove the two connector screws from the connector in the front panel (see Figure 1).
Step 5 Using a Phillips screwdriver, remove the expansion-module screw from the front panel (see Figure 1 or Figure 2) and the two screws on the top of the expansion module (see Figure 3 or Figure 4).
Figure 1 Screws to Remove if an Expansion Module with a SCSI Controller Is Installed
Figure 2 Screws to Remove if an Expansion Module with a Disk Drive Is Installed
Step 6 Carefully unplug the expansion module and lift it away from the network module.
Note Expansion modules with a disk drive have two connectors that plug into the network module—one at the front and one at the rear. Expansion modules with a SCSI controller have one connector that plugs into the network module—located at the rear.
Tip For expansion modules with a SCSI controller, confirm that the connector has been removed from the opening in the faceplate before you lift the expansion module away from the network module.
Figure 3 Expansion Module with Disk Drive
Figure 4 Expansion Module with SCSI Controller
Step 7 If the memory SODIMM is in the upper slot of the SODIMM connector, remove the memory SODIMM and reinstall it in the lower slot as follows:
a. Carefully spread the clips at each edge to release the SODIMM.
b. Lift the SODIMM up slightly and remove it from the SODIMM connector.
c. Hold the SODIMM so that it is angled upward about 30 degrees from horizontal, and insert it into the lower slot of the SODIMM connector until it is completely seated. The notch in the SODIMM prevents incorrect orientation.
d. Carefully press the SODIMM into place so that the clips latch on both edges. The SODIMM must be horizontal when properly installed.
Step 8 Install the new memory SODIMM in the upper slot of the SODIMM connector as follows:
a. Hold the SODIMM so that it is angled upward about 30 degrees from horizontal, and insert it into the upper slot of the SODIMM connector until it is completely seated. The notch in the SODIMM prevents incorrect orientation.
b. Carefully press the SODIMM into place so that the clips latch on both edges. The SODIMM must be horizontal when properly installed.
Step 9 Plug the expansion module into the network module. Expansion modules with a disk drive have two connectors that plug into the network module—one at the front and one at the rear. Expansion modules with a SCSI controller have one connector that plugs into the network module—located at the rear. See Figure 3 or Figure 4.
Caution Align the connectors carefully and use gentle pressure when installing an expansion module. Misalignment or excessive force can damage connector pins or other board components.
Note For expansion modules with a SCSI controller, be sure to insert the connector on the expansion module through the opening in the faceplate before you seat the expansion module.
Step 10 Using a Phillips screwdriver, reinstall the expansion-module screw in the front panel and the two standoff screws.
Step 11 For expansion modules with a SCSI controller, insert the two connector screws (see Figure 1) into the holes on the connector, and tighten the screws carefully using a small flat-blade screwdriver.
Step 12 Install the network module into the router chassis and connect the network module to the network (refer to the Cisco Network Modules Hardware Installation Guide).
These sections explain how to obtain documentation from Cisco Systems.
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Obtaining Technical Assistance
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Cisco TAC Escalation Center
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