Specifications

Maintaining the Router B-5
Upgrading the DRAM SIMM
Upgrading the DRAM SIMM
This section describes how to upgrade the DRAM SIMM on the system card. You might
need to upgrade the DRAM SIMM for the following reasons:
• You upgrade the Cisco IOS feature set or release.
• Your router maintains large routing tables or other memory-intensive features, such as
spoofing or protocol translations.
To see how much memory is currently installed in the router, enter the show version
command. Near the middle of the resulting output, a message similar to the following
displays:
Cisco XXXX(68030) processor (revision X) with 4092K/2048K bytes of memory.
This line shows how much memory is installed (in this example, 4092K/2048K). The first
number represents primary memory and the second number represents shared memory.
Tools Required
You will need the following tools to remove and replace the DRAM SIMM on the router:
• Medium-size flat-blade screwdriver (1/4 inch [0.625 cm])
• ESD-preventive wrist strap
• The DRAM SIMM required for your planned upgrade
DRAM SIMM Installation
Take the following steps to install the DRAM SIMMs:
Step 1 Power OFF the router.
Step 2 Attach an ESD-preventive wrist strap.
Step 3 Open the cover following the instructions in the section “Opening the Chassis”
earlier in this appendix.