Tài liệu QUY TRÌNH KHÔI PHỤC PASSWORD (password recovery) pptx

router>enable router#copy startup-config running-config 7.. Đặt lại password mới: router#config term routerconfig#enable secret newpassword routerconfig#enable password newpassword... Kh

QUY TRÌNH KHÔI PHỤC PASSWORD

(password recovery)

I Đối với Cisco 1600, 1700 and 2600 Series Routers:

1 Establish a HyperTerminal (Private Edition 5.0 or higher) console connection with the router

2 Tắt router, sau đó bật lại Nhấn Ctrl-Break trong vòng 60 giây

monitor: command "boot" aborted due to user interrupt

rommon 1 >

3 Dùng lệnh confreg để đổi nội dung thanh ghi sang 2142

rommon 1 >confreg 0x2142

4 Reboot the router with the reset command.

rommon 2 >reset

5 Sau khi reboot, dùng Ctrl-C để vào user mode:

router>

6

router>enable

router#copy startup-config running-config

7

router>enable

router#show startup-config

8 Đặt lại password mới:

router#config term

router(config)#enable secret newpassword

router(config)#enable password newpassword

router(config)#line con 0

router(config)#line aux 0

router(config)#line vty 0 4

9 #copy run start

10 Khôi phục giá trị thanh ghi về 0x2102

router#config term

router(config)#config-register 0x2102

router#copy running-config startup-config

11 Kiểm tra nội dung thanh ghi

router#show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-DO3S-M), Version 12.0(5)T1, RELEASE

SOFTWARE (fc1)

Copyright (c) 1986-1999 by cisco Systems, Inc

Compiled Tue 17-Aug-99 13:18 by cmong

Image text-base: 0x80008088, data-base: 0x80CB67B0

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

1 FastEthernet/IEEE 802.3 interface(s)

2 Low-speed serial(sync/async) network interface(s)

32K bytes of non-volatile configuration memory

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2142 (will be 0x2102 at next reload)

Cisco 2500 Series Routers:

1 Thiết lập HyperTerminal (Private Edition 5.0 or higher) console connection with the router

2 Tắt routers, sau đó bật lại Nhấn CTRL-BREAK trong vòng 60 giây

Abort at 0x10EA884 (PC)

>

3 Đổi nội dung thanh ghi thành 0x2142

>o/r 0x2142 (lower case of the letter O for o/r and zero for 0x2142)

4 Reboot router

>i

5 Nhấn Ctrl-C để vào user mode khi router khởi động lại

router>

6 Vào enable mode

router>enable

router#copy startup-config running-config

7 Thực hiện các lệnh show running-config or show startup-config

router#show startup-config

8 Enter a new privileged password and change other lost passwords as may be necessary

router#config term

router(config)#enable secret newpassword

router(config)#enable password newpassword

router(config)#line con 0

router(config)#line aux 0

router(config)#line vty 0 4

9 Copying the startup-configuration to running-configuration Thực hiện lệnh no shutdown trên tất cả

các interface được dùng

10 Chuyển nội dung thanh ghi về giá trị ban đầu Lưu cấu hình

router#config term

router(config)#config-register 0x2102

router#copy running-config startup-config

11 Kiểm tra thanh ghi có giá trị là 2102 bằng lệnh show version

router#show version

Cisco Internetwork Operating System Software

IOS (tm) 2500 Software (C2500-D-L), Version 12.0(4), RELEASE SOFTWARE

(fc1)

Copyright (c) 1986-1999 by cisco Systems, Inc

ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE

BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)

1 Ethernet/IEEE 802.3 interface(s)

2 Serial network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2142 (will be 0x2102 at next reload)

12 Reboot the router

router#reload