Modify privileged passwords for routers, restore factory settings, backup profiles, and upgrade operating system practices

1. modifying privileged passwords

1) First we create a router on the Cisco PT file.

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2) Tap the router to enter the command line, first set a password, and save.

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3) After saving successfully, assume that you now forget the password, then the shutdown restart, in the boot process, press CTRL + C or ctrl+pause into the Rommon, in Rommon mode input Confreg 0x2142 into a blank system, Then output reset restarts.

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4) Now enter the system will no longer need to enter the password login, enter the privileged mode

Copy Starting-config running-config copies the original system configuration file to this blank system, then goes into the global mode setting password, and after the setting is successful, return to privileged mode to save the configuration file.

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5) Continue to enter reload restart in privileged mode, enter common, input confreg 0x2102 change to normal boot mode, and then enter reset reboot system, modify the privileged password is completed.

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2. Restore factory settings

1) Continue above, enter the erase Startup-config in privileged mode to restore the factory settings, reboot and then complete the recovery.

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3. Back up the router's configuration file on TFTP

1) First prepare a router and a server, with a cross-line connection, respectively to the router 0/0 port and the server set the IP to 192.168.1.1 and 192.168.2.2, the subnet mask is 255.255.255.0, connected.

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2) Configure on the router, enter the privileged mode of the copy running-config tftp to backup the configuration file to TFTP, enter after asking you to save where, enter the server's IP 192.168.1.2, and then ask your name, you can use the default or your own settings , here I am using the default name, and then the backup was successful.

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4. Upgrading the operating system

1) Following the above operation, enter the privileged mode, if your previous configuration has not been saved need to save and upgrade the system, or upgrade the system after the restart will lose the configuration, then enter the copy TFTP flash, then enter the server IP 192.168.1.2, and then enter the name of the system you want to upgrade, The prerequisite is that your TFTP to have this system to upgrade, model also to match, meet the above requirements, you can complete the upgrade, after the successful upgrade, restart upgrade is complete.

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2) You can enter show version to view the current release and upgrade complete.

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If there is any mistake, please correct me.

This article is from the "Drip" blog, please be sure to keep this source http://xuyiren.blog.51cto.com/9972295/1621983

Modify privileged passwords for routers, restore factory settings, backup profiles, and upgrade operating system practices