Cisco CPA2501 User Manual page 94

Replacing the System-Code SIMMs
Step 6
Step 7
Replacing the System-Code SIMMs
The system code (router operating system software) is stored in Flash memory SIMMs.
Tools Required
You will need the following tools to remove and replace the system-code SIMMs on the
router:
•
Medium-size flat-blade screwdriver (1/4 inch [0.625 cm])
•
ESD-preventive wrist strap
•
System-code SIMM(s)
Preparing to Install the System-Code SIMM
There are two system-code (Flash memory) SIMM sockets on the system board. If you
want to install system-code SIMMs in both sockets, the SIMMs must be the same size. For
example, if a 4-MB system-code 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. You can verify how much
Flash memory is already installed in your router by entering the show flash EXEC
command.
Caution
SIMMs are shipped without preinstalled software. Before proceeding with this procedure,
use the copy flash tftp EXEC command to back up the system code to a TFTP server.
B-10 Router Installation and Configuration Guide
Insert the new DRAM SIMM by sliding the end with the metal fingers into the
SIMM connector socket at approximately a 45-degree angle to the system card.
Gently rock the SIMM back into place until the latch on either side snaps into
place. Do not use excessive force because the connector may break.
Replace the router cover. Follow the instructions in the section "Closing the
Chassis" later in this appendix.
The system code is stored on the Flash memory SIMMs, but new system-code