Careless Network Management: vro password restoration tips

This article describes how to restore the password of A vro and how to set the password of a CISCO vro. This article describes the specific operations of the CISCO 2600 series and the CISCO 2500 series.

In our daily life, passwords are everywhere. QQ passwords, email passwords, and Windows logon passwords. For our network administrator, there must be one or more vro passwords. If the QQ password is forgotten, it can be recovered through password protection. If the system login password is forgotten, it can be cracked using a tool. What should I do when the vro password is forgotten? The following describes how to restore a vro password.

I. CISCO 2600 Series

Step 1: connect the control port (Console port) of the vro to the computer and click Start> All Programs> accessories> Super Terminal to start the Super Terminal Program, set the parameter to baud rate 9600, data bit 8, parity to none, stop bit to 1, traffic control to select none, turn on the router power, press Ctrl + Break on the computer at the same time within one minute of the boot to bring the router into the monitoring mode (Rom Monitor status), then the prompt will be displayed as rommon1>.

Step 2: Execute the Confreg command to ignore the configuration file, start it directly, and then reconfigure the register. When the screen prompts "do you wish to change the configuration (y/n)", enter y and n in the following options. Enter y when the screen prompts enable "ignore system configuration information" (y/n) and n as the next option.

Step 3: Enter the Reset command at the prompt, press enter to execute, and restart the vro.

Step 4: restart the vro and enter the privileged mode. Run the config mem command to keep the previous configuration information valid. Then you can view the password of the router, I don't need to talk about what to do after getting the password. Please change it to your familiar password.

Ii. CISCO 2500 Series

The entire process is similar to that of the 2600 series, but some commands are different.

Step 1: connect the control port of the router to the serial port of the computer, start the computer Super Terminal, set its parameter to baud rate 9600, data bit 8, parity check to none, stop bit to 1, none for traffic control. Turn on the vro power, press Ctrl + Break within one minute after the boot, so that the vro enters the monitoring mode (Rom Monitor status), and the prompt will be displayed as>.

Step 2: run the "e/s2000002" command to view the value of Configure-register and write down the value.

Step 3: run the "o/r0x0142" command to update the Configure-register value so that the configuration file is skipped during vro startup, that is, the password does not work.

Step 3: restart the vro.

Step 4: After the vro is started, enter the privileged mode and run the "Config mem" command to keep the previous configuration information valid.

Step 5: You can view the original password according to the normal operation. Of course, you need to change the password as you are familiar with it and it is hard to forget it.

Step 6: Restore the "configure-register" value, restart the vro, and then the device will resume normal operation.

Execute the "Configure-register 0x (values of Configure-register recorded between them), write, and reload" commands in sequence to restore the password.

Here, we only list the widely used methods for recovering vrouters 2600 and 2500. The 2600 method is also applicable to vrouters on the 2600 system, the 2500 method is also applicable to vrouters under 2500. In fact, the password recovery of the two series of routers has a common feature, that is, to allow the vro to skip the configuration file, start the vro directly, and then change the password, and ultimately achieve the purpose of restoring the password. For other series of vrouters, let's look at each other and try to recover it!