Datasheet

Upgrading System Memory, Internal Flash Memory, and Boot ROM in Cisco 2600 Series Routers

OL-5474-01

Replacing the Internal Flash Memory SIMM

Step 3 Hold the DIMM with the polarization notch on the right, near the rear of the chassis, and with the

connector edge at the bottom.

Step 4 Beginning with socket 0, insert the DIMM perpendicular to the socket. Push firmly into place, as shown

in Step 1 of Figure 9. When the DIMM is properly seated, the socket guide posts fit through the

alignment holes, and the locking spring clips click into place, as shown in Step 2 of Figure 9.

Step 5 Ensure that each DIMM is straight (perpendicular to the socket). (See Figure 9.)

Caution It is normal to feel some resistance when installing a DIMM, but do not use excessive force on the

DIMM, and do not touch the surface components.

Step 6 Repeat Step 3 through Step 5 for each DIMM.

Step 7 Reinstall the router cover. Follow the instructions in the “Closing the Chassis” section on page 19.

Replacing the Internal Flash Memory SIMM

The system code (router operating system software) is stored in a flash memory 80-pin single in-line

memory module (SIMM) in Cisco 261x, Cisco 262x, Cisco 265x, and Cisco 26xxXM routers.

Note In Cisco 2691 routers, the internal flash memory is a compact flash card, not a SIMM. If you are

replacing the internal compact flash card in a Cisco 2691 router, refer to the Installing and Formatting

ICisco I2691, Cisco I3631 and Cisco I3700 Compact Flash Memory Cards document.

Tools Required

You need the following tools to remove and replace the system-code SIMM on the router:

• Medium-size flat-blade screwdriver (1/4-inch [0.625 cm])

• ESD-preventive wrist strap

• Flash SIMM

Preparing to Install the Flash SIMM

There is one system-code (flash memory) SIMM socket on the system board. You can verify how much

flash memory is already installed in your router by entering the show flash EXEC command.

Caution The system code is stored on the flash memory SIMM, but new system-code SIMMs are shipped

without preinstalled software. Before continuing with this procedure, use the copy flash tftp

command in privileged EXEC mode to back up the system code to a TFTP server.