Appendix B Troubleshooting Initial Startup Problems
Troubleshooting the Upgrade
Troubleshooting the Upgrade
This section contains sample error messages that appear if an upgrade fails or if an upgrade is successful but the upgrade image is corrupted.
Replacing or Recovering a Lost Password
This section describes how to recover a lost enable or console login password, and how to replace a lost enable secret password on your Cisco ASR 1000 Series Router.
Note It is possible to recover the enable or console login password. The enable secret password is encrypted, however, and must be replaced with a new enable secret password.
Overview of the Password Recovery Procedure
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| Following is an overview of the steps in the password recovery procedure: | ||||||
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| Step 1 | If you can log in to the router, enter the show version command to determine the existing configuration | ||||||
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| register value. | ||||||
| Step 2 | Press the Break key to get to the bootstrap program prompt (ROM monitor). You might need to reload | ||||||
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| the system image by power cycling the router. | ||||||
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| Note |
| To recover a lost password if the Break function is disabled on the router, you must have physical | ||||
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| Step 3 | Change the configuration register so the following functions are enabled: | ||||||
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| a. | Break | |||||
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| b. | Ignore startup configuration | |||||
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| c. Boot from flash memory | ||||||
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| Note |
| The key to recovering a lost password is to set the configuration register bit 6 (0x0040) so that | ||||
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| the startup configuration (usually in NVRAM) is ignored. This allows you to log in without | |||
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| using a password and to display the startup configuration passwords. | |||
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| Step 4 | Power cycle the router by turning power off and then back on. | ||||||
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| When powering off the router, wait 30 seconds before powering it on again. | ||||
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| Step 5 | Log in to the router and enter the privileged EXEC mode. | ||||||
| Step 6 | Enter the show | ||||||
| Step 7 | Recover or replace the displayed passwords. | ||||||
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| Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation and Initial Configuration Guide |
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