User guide

APPENDIX
Maintaining the Cisco 2500 Series Access Server B-1
B
Maintaining the Cisco 2500
Series Access Server
This appendix contains information about maintenance procedures you might need to
perform on the Cisco 2500 series access server as your internetworking needs change. If
any upgrades requiring hardware or software replacement are necessary, a related
publication called a configuration note will ship to you automatically with the parts.
This appendix contains the following sections:
• Opening the Chassis
• Upgrading the Boot PROMs
• Installing Primary-Memory DRAM SIMMs
• Replacing System-Code SIMMs
• Closing the Chassis
• Recovering a Lost Enable Password
• Virtual Configuration Register Settings
Caution Before opening the chassis, ensure that you have discharged all static electricity
from your body and be sure the power is off. Before performing any procedures described
in this appendix, review the sections “Safety Recommendations,” “Maintaining Safety with
Electricity,” “Preventing Electrostatic Discharge Damage,” and “General Site
Requirements” in the chapter “Preparing to Install the Cisco 2500 Series Access Server.”
Warning Before working on a chassis or working near power supplies, unplug the power
cord on AC units; disconnect the power at the circuit breaker on DC units. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)