Resetting The Configuration Register Value; Problem Solving - Cisco 1751V Hardware Installation Manual

Problem Solving

Step 5

Resetting the Configuration Register Value

Step 1
Step 2
Step 3
Step 4
Problem Solving
Cisco 1751 Router Hardware Installation Guide
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Router(config)# Ctrl-Z
Save your configuration changes:
Router# copy running-config startup-config
Follow these steps once you have recovered or reconfigured a password:
Enter the configure terminal command to enter configuration mode:
Router# configure terminal
Enter the config-register command and the original configuration register value
that you recorded in Step
Press Ctrl-Z to exit configuration mode:
Router(config)# Ctrl-Z
Reboot the router, and enter the recovered password.
The key to problem solving is to isolate the problem to a specific subsystem by
comparing what the router is doing to what it should be doing.
When problem solving, consider the following subsystems of the router:
WICs and VICs—Refer to the LEDs on the cards and the LEDs on the router
•
front panel to help identify a failure. For more information on WICs and
VICs, refer to the Cisco WAN Interface Cards Hardware Installation Guide
that comes with each card.
Cables—Check all the external cables that connect the router to the network.
•
Power system—Check the external power source, power cable, router power
•
supply, and circuit breaker. Check for inadequate ventilation or air circulation
that might cause overheating.
5.
Chapter 3 Troubleshooting
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