当ASA镜像文件丢失时：

系统恢复

rommon #0> address x.x.x.x

rommon #1> server x.x.x.x

rommon #2> gateway x.x.x.x          

rommon #2> interface GigabitEthernet0/1

GigabitEthernet0/1

MAC Address: 000f.f775.4b54

rommon #3> file asa821-k8.bin

 

查看：rommon #2> set

 

开始下载：rommon #5> tftpdnld

当ASA密码丢失时：

密码恢复

1、使用BREAK or ESC进入ROMMON模式

 

2、修改confreg

rommon #0> confreg

Current Configuration Register: 0x00000001

Configuration Summary:

boot default image from Flash

Do you wish to change this configuration? y/n [n]: y    //修改寄存器值

enable boot to ROMMON prompt? y/n [n]:

enable TFTP netboot? y/n [n]:

enable Flash boot? y/n [n]:

select specific Flash image index? y/n [n]:

disable system configuration? y/n [n]: y    //不加载配置

go to ROMMON prompt if netboot fails? y/n [n]:

enable passing NVRAM file specs in auto-boot mode? y/n [n]:

disable display of BREAK or ESC key prompt during auto-boot? y/n [n]:

Current Configuration Register: 0x00000040

 

3、重启设备rommon #1> boot

4、ciscoasa# copy startup-config running-config  //之前的初始配置覆盖当前配置

5、修改密码

Chicago# config terminal

Chicago(config)# passwd C1$c0123

Chicago(config)# enable password C1$c0123

5、修改寄存器

Chicago(config)# config-register 0x1

6、保存

write