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I'm trying to restore an ASA 5505 to the factory defaults. According to the instructions from several sources (e.g. http://www.mailbeyond.com/restoring-factory-defaults-to-the-cisco-asa5505-firewall-via-the-console) I need to run the following command:

ciscoasa(config)#config factory-default

But this returns:

ERROR: command can only be executed in single router mode

The command to put the ASA into single router mode should be:

ciscoasa(config)#mode single

But this returns:

ciscoasa(config)#mode single
                   ^
ERROR: %Invalid input detected at '^' marker
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What's your privilege level? And do you have anything restricting the available command set, like TACACS authorization rules? What do you get from show context? –  Shane Madden May 10 '12 at 22:35

1 Answer 1

up vote 3 down vote accepted

The 5505 is not capable of running in multiple context mode. This is probably just a bug. I would:

  1. backup your config: more system:running-config then save this config to a txt file
  2. wr erase to erase the startup config
  3. reload and say no when it asks you to save the current running configuration
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That did the trick. After reload I was able to restore factory defaults. BTW, it's not obvious to a newbie that reload is a command, suggest adding backticks. –  RobB May 10 '12 at 23:22

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