View source for Delete / Erase / Change Password for the Cisco 7100 Series Routers

'''Step 1:''' Hit '''ctrl / break''' directly after powering up the router. 
     If the break sequence does not work, refer to [[Standard Break Key Sequence Combinations During Password Recovery]] 
     for other key combinations. 
'''Step 2''': type: '''''confreg 0x2142''''' from rommon 1>  
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'''Step 3''': type: '''''reset''''' from rommon 2>  
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'''Step 4''': Would you like to enter the initial configuration dialog? [yes/no]: answer '''''NO''''' 
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'''Step 5:''' Type '''enable''' at  Router>
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'''Step 6:'''Type '''configure memory or copy startup-config running-config'''.
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'''Step 7:''' Type '''show running-config'''.
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'''Step 8:''' Type '''configure terminal''' to change or remove the password from the router.
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'''Step 9:''' Type '''enable secret <password>''' in order to change the enable secret password or type '''NO ENABLE SECRET''' to remove the secret from router(config)#> 
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'''Step 10''': type: '''''NO ENABLE PASSWORD''''' to remove the password from router (config)#>
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'''Step 14:''' Type the '''no shutdown''' command on every interface that you use.
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'''Step 12:''' Type '''config-register <configuration_register_setting>.''' For example: hostname(config)#config-register 0x2102 .
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'''Step 13:''' Hit '''Ctrl / z''' or '''end''' to leave the configuration mode.
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'''Step 14:''' Type ''' write memory''' or '''copy running-config startup-config ''' to save the changes.
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