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Cisco Product Numbers = MEM-1X4F and MEM-1X8F
This document explains how to install Flash memory SIMMs in Cisco 2500 series routers running boot ROM Version 9.14(8) or later. (Earlier versions of the boot ROM do not support 8-MB Flash memory SIMMs or two banks of SIMMs.)
There are two Flash memory SIMM sockets on the system card. If you want to install Flash memory SIMMs in both sockets, the SIMMs must be the same size. For example, if a 4-MB Flash memory SIMM is already installed in your router, the new SIMM must also be 4 MB. This upgrade would give you a total of 8 MB. To upgrade to 16 MB, remove the 4-MB Flash memory SIMM and install two new 8-MB Flash memory SIMMs.
Enter the show flash EXEC command to verify how much Flash memory is already installed in your router.
 | Caution Flash memory SIMMs are shipped without preinstalled system-code software. Before proceeding with this procedure, use the copy flash tftp EXEC command to back up the system code on the SIMM to a TFTP server if you need to remove it. Refer to the Router Products Configuration Guide for detailed instructions. |
Before installing Flash memory SIMMs, read the electrostatic discharge (ESD) instructions in this section to prevent damage to the equipment. ESD is a discharge of stored static electricity that can damage equipment and impair electrical circuitry. It occurs when electronic components are improperly handled and can result in complete or intermittent failures.
Following are guidelines for preventing ESD damage:
| Caution To avoid damaging the equipment, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megohms (Mohms). |
The following tools and equipment are required to remove and replace the Flash memory SIMMs on the router:
To access the Flash memory SIMMs in Cisco 2500 series routers, you must remove the chassis cover.
To remove the cover, follow these steps:
Step 1 Turn the power off, but do not unplug the power cable. Having the power cord connected ensures a ground path for any ESD voltages.
Step 2 Remove all interface cables from the rear panel of the router.
 | Warning This warning applies to all models that include a BRI port. Network hazardous voltages are accessible in the basic rate interface (BRI) cable. If you detach the BRI cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages are also accessible on the system card in the area of the BRI port (RJ-45 connector), even when power is (see Figure 1). |
Step 3 If your router is mounted in a rack, remove the rack-mounting brackets; then remove the router from the rack.
Step 4 Turn the router upside down so that the top of the chassis is resting on a stable surface and the front of the chassis is toward you (see Figure 2).
Step 5 Remove the single screw on the bottom of the chassis at the side closest to you (see Figure 2).
Step 6 Insert a medium flat-blade screwdriver into the slots shown in Figure 2 and rotate the blade so that the top and bottom sections separate slightly.
Step 7 Hold the chassis with both hands and position it as shown in Figure 3.
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Step 8 Pull the top section away from the bottom section (see Figure 3). The fit is very snug, so it may be necessary to repeat Step 6 and work the chassis sections apart at one end and then the other until the cover is removed.
Step 9 When the cover is removed, set it aside.
| Warning To prevent shock hazard and injury, do not touch the power supply and fan assemblies. |
Step 10 Proceed with the next section, "Installing Flash Memory SIMMs."
To install Flash memory SIMMs, follow these steps:
Step 1 Turn the chassis so that the system card is in the position shown in Figure 4, with the Flash memory SIMMs toward you.
Step 2 Locate the SIMM sockets, labeled CODE 0 and CODE 1, on the system card (see Figure 4).
Step 3 If the Flash memory SIMM is not the same size as the SIMM already installed in the router, remove the existing SIMM by pulling outward on the tabs to unlatch them. Raise the SIMM to a vertical position and remove it from the socket (see Figure 5).
| Caution Flash memory SIMMs are shipped without preinstalled system-code software. Be sure to back up the system code on the SIMM before removing it. Refer to the Router Products Configuration Guide for detailed instructions. |
| Caution To prevent damage, do not push on the center of the SIMMs. Handle each SIMM carefully. |
Step 4 Using the orientation shown in Figure 5, position the new Flash memory SIMM so that the polarization notch is located at the right end of the SIMM socket. Note that the correct position of the SIMM is shown in Figure 4.
Step 5 Insert the new Flash memory SIMM by sliding the end with the metal fingers into the appropriate SIMM connector socket (CODE 0 or CODE 1) at approximately a 45-degree angle to the system card. If you are installing only one SIMM, install it in the socket labelled CODE0. Gently rock the SIMM back into place until the latch on either side snaps into place. Do not use excessive force because the connector could break.
Step 6 Proceed with the next section "Replacing the Cover."
To replace the chassis cover, follow these steps:
Step 1 Position the two chassis sections as shown in Figure 6.
Step 2 Referring to Figure 6, press the two chassis sections together and ensure the following:
| Caution To fit the two sections together, it may be necessary to work them together at one end and then the other, working back and forth. Make sure you do not bend the chassis edges. |
Step 3 When the two sections fit together snugly, turn the chassis so that the bottom is facing up, with the front panel toward you (see Figure 2).
Step 4 Replace the cover screw and tighten it to no more than 8 or 9 inch-pounds of torque.
Step 5 Reinstall the chassis to its original location on the wall, in the rack, on a desk, or on a tabletop.
Step 6 Replace all cables and turn on the power to the chassis.
 | TimeSaver If error messages relating to memory are displayed, make sure the SIMM is firmly seated in the socket. |
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