Tag: Register BRE router exists reload conf device star RAM
Clear the password for the Cisco 1841 router:
(1) The console line connects the computer and the router console port, through the terminal client connection, the router is powered on (if the device is started, press the power button, restart the router, wait for the router to start when the [Ctrl+break] key interrupts the normal boot process, into the ROM state.
(2) Modify the value of the configuration register and restart
The value of the Rommon 1> Confreg 0x2142//Modify register is 0x2142, in order to enable the router to skip the execution of the NVRAM configuration file, thus not checking the previously set password.
Rommon 2>i//Restart router
(3) Wait for the router to start and enter setup mode, press [Ctrl + C] key to exit Setup mode, change password
Router> Enable
router# copy startup-config running-config//Bring up the configuration file in the router NVRAM
routera# Config teminal
RouterA (config) # enable password Cisco//Modify the Enable password to replace the original password
(4) Restore the Register value, save the configuration and restart the router
RouterA (config) # Config-register 0x2102//Recovery register value is 0x2102, in order to execute the configuration file in Nvram the next time the router is restarted
RouterA (config) # exit
routera# copy running-config startup-config//save config file to Nvram
routera# Reload//Restart router, you can see the original configuration still exists after reboot
当然，如果原先登录需要用户名，则在第三步时重设用户密码，或者重新创建新用户和密码，设置权限级别
One old device Cisco 1841 router re-use, forgot the Enable password
