
cisco 2811 reset factory with putty
۱٫ Connect to the serial console.
۲٫ Power off the router and then power on.
۳٫ Send the router a BREAK. This should bring you to the rommon prompt
۴٫ Type this command at the rommon prompt in order to boot from Flash.
rommon 1 > confreg 0x2142
۵٫ Reset the router.
rommon 2 > reset
۶٫ The router should now boot into the Initial config dialogue:
Would you like to enter the initial configuration dialog? [yes/no]: yes
۷٫ Follow the prompts, to set a basic config.
۸٫ Enter enable mode and set the router to boot from the right place
Router>enable Router>conf t Router(config)>config-register 0x2102 Router(config)>end Router>wr mem
۹٫ Reload the router to check it worked properly
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