Password Recovery Procedure

To recover passwords for the ASA, perform the following steps:

Step 1 

Connect to the ASA console port according to the instructions in "Accessing the Command-Line Interface" section.

Step 2 

Power off the ASA, and then power it on.

Step 3 

After startup, press the Escape key when you are prompted to enter ROMMON mode.

Step 4 

To update the configuration register value, enter the following command:

rommon #1> confreg 0x41

Update Config Register (0x41) in NVRAM...

Step 5 

To set the ASA to ignore the startup configuration, enter the following command:

rommon #1> confreg

The ASA displays the current configuration register value, and asks whether you want to change it:

Current Configuration Register: 0x00000041

Configuration Summary:

  boot default image from Flash

  ignore system configuration

Do you wish to change this configuration? y/n [n]: y

Step 6 

Record the current configuration register value, so you can restore it later.

Step 7 

At the prompt, enter Y to change the value.

The ASA prompts you for new values.

Step 8 

Accept the default values for all settings. At the prompt, enter Y.

Step 9 

Reload the ASA by entering the following command:

rommon #2> boot

Launching BootLoader...

Boot configuration file contains 1 entry.

Loading disk0:/asa800-226-k8.bin... Booting...Loading...

The ASA loads the default configuration instead of the startup configuration.

Step 10 

Access the privileged EXEC mode by entering the following command:

hostname> enable

Step 11 

When prompted for the password, press Enter.

The password is blank.

Step 12 

Load the startup configuration by entering the following command:

hostname# copy startup-config running-config

Step 13 

Access the global configuration mode by entering the following command:

hostname# configure terminal

Step 14 

Change the passwords, as required, in the default configuration by entering the following commands:

hostname(config)# password password

hostname(config)# enable password password

hostname(config)# username name password password

Step 15 

Load the default configuration by entering the following command:

hostname(config)# no config-register

The default configuration register value is 0x1.

Step 16 

Save the new passwords to the startup configuration by entering the following command:

hostname(config)# copy running-config startup-config

GNS3에서 Cisco 라우터에 NM-16ESW 모듈을 올려서 구동시 

VLAN 설정 중 아래와 같은 에러가 발생함

(3725, 2691 장비(IOS) 모두 동일한 에러 발생)

검색결과 해결방법은 다음과 같았는데, 내 경우는시도해봐도 해결되지 않았다.

이런저런 시도 중 GNS3에서 장비 설정을 변경한 후 재구동 하니 VLAN설정이 정상적으로 잘 먹는다.

PCMCIA disk 크기를 0에서 늘려주니 일단 해결이 되었다.

일단 해결은 되었으나, 확실한 솔루션인지는 조금 더 지켜봐야겠다.