Step-by-Step Procedure
Follow
the password recovery procedure below.
1.
Attach
a terminal or PC with terminal emulation (for example, Hyper Terminal) to the
console port of the switch.
Use the following terminal settings:
o
Bits
per second (baud): 9600
o
Data
bits: 8
o
Parity:
None
o
Stop
bits: 1
o
Flow
Control: Xon/Xoff
Note: For additional information on cabling and connecting a
terminal to the console port, refer to Connecting a
Terminal to the Console Port on Catalyst Switches.
2.
Unplug
the power cable.
3.
Power
the switch and bring it to the switch: prompt:
For 2900XL, 3500XL, 2940, 2950, 2960, 2970, 3550, 3560, and
3750 series switches, do this:
Hold down the mode button located on the left side of the
front panel, while you reconnect the power cable to the switch.
Catalyst Switch Series
|
LED Behavior and Mode Button Release Action
|
2900XL, 3500XL, 3550
|
Release the Mode button
when the LED above Port1x goes out.
|
2940, 2950
|
Release the Mode button
after approximately 5 seconds when the Status (STAT) LED goes out.
When you release the Mode button, the SYST LED blinks amber.
|
2960, 2970
|
Release the Mode button
when the SYST LED blinks amber and then turns
solid green. When you release the Mode button, the SYST LED blinks green.
|
3560, 3750
|
Release the Mode button
after approximately 15 seconds when the SYST LED turns solid green. When you release
the Mode button, the SYST LED blinks green.
|
Note: LED position may vary slightly depending on the model.
Catalyst 3524XL
Catalyst 2950-24
For 2955 series switches only:
The Catalyst 2955 series switches do not use an external
mode button for password recovery. Instead the switch boot loader uses the
break-key detection to stop the automatic boot sequence for the password
recovery purposes. The break sequence is determined by the terminal application
and operating system used. Hyperterm running on Windows 2000 uses Ctrl + Break. On a workstation
running UNIX, Ctrl-C is the break key. For more
information, refer to Standard
Break Key Sequence Combinations During Password Recovery.
The example below uses Hyperterm to break into switch: mode on a 2955.
C2955 Boot Loader (C2955-HBOOT-M) Version 12.1(0.0.514), CISCO DEVELOPMENT TEST
VERSION
Compiled Fri 13-Dec-02 17:38 by madison
WS-C2955T-12 starting...
Base ethernet MAC Address: 00:0b:be:b6:ee:00
Xmodem file system is available.
Initializing Flash...
flashfs[0]: 19 files, 2 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 7741440
flashfs[0]: Bytes used: 4510720
flashfs[0]: Bytes available: 3230720
flashfs[0]: flashfs fsck took 7 seconds.
...done initializing flash.
Boot Sector Filesystem (bs:) installed, fsid: 3
Parameter Block Filesystem (pb:) installed, fsid: 4
*** The system will autoboot in 15 seconds ***
Send break character to prevent autobooting.
!--- Wait until you see this message before
!--- you issue the break sequence.
!--- Ctrl+Break is entered using Hyperterm.
The system has been interrupted prior to initializing the flash file system to finish
loading the operating system software:
flash_init
load_helper
boot
switch:
4.
Issue
the flash_init command.
5. switch: flash_init
6. Initializing Flash...
7. flashfs[0]: 143 files, 4 directories
8. flashfs[0]: 0 orphaned files, 0 orphaned directories
9. flashfs[0]: Total bytes: 3612672
10. flashfs[0]: Bytes used: 2729472
11. flashfs[0]: Bytes available: 883200
12. flashfs[0]: flashfs fsck took 86 seconds
13. ....done Initializing Flash.
14. Boot Sector Filesystem (bs:) installed, fsid: 3
15. Parameter Block Filesystem (pb:) installed, fsid: 4
16. switch:
17.
18. !--- This output is from a 2900XL switch. Output from
19. !--- other switches will vary slightly.
20.
21.
Issue
the load_helper command.
22. switch: load_helper
switch:
23.
Issue
the dir flash: command.
Note: Make sure to type a colon ":" after the dir flash.
The switch file system is displayed:
switch: dir flash:
Directory of flash:/
2 -rwx 1803357 <date> c3500xl-c3h2s-mz.120-5.WC7.bin
!--- This is the current version of software.
4 -rwx 1131 <date> config.text
!--- This is the configuration file.
5 -rwx 109 <date> info
6 -rwx 389 <date> env_vars
7 drwx 640 <date> html
18 -rwx 109 <date> info.ver
403968 bytes available (3208704 bytes used)
switch:
!--- This output is from a 3500XL switch. Output from
!--- other switches will vary slightly.
24.
Type rename
flash:config.text flash:config.old to
rename the configuration file.
25. switch: rename flash:config.text flash:config.old
26. switch:
27.
28. !--- The config.text file contains the password
29. !--- definition.
30.
31.
Issue
the boot command to boot the system.
32. switch: boot
33. Loading "flash:c3500xl-c3h2s-mz.120-5.WC7.bin"...###############################
34. ################################################################################
35. ######################################################################
36. File "flash:c3500xl-c3h2s-mz.120-5.WC7.bin" uncompressed and installed, entry po
37. int: 0x3000
38. executing...
39.
40. !--- Output suppressed.
41. !--- This output is from a 3500XL switch. Output from other switches
42. !--- will vary slightly.
43.
44.
Enter
"n" at the prompt to abort the initial configuration dialog.
45. --- System Configuration Dialog ---
46. At any point you may enter a question mark '?' for help.
47. Use ctrl-c to abort configuration dialog at any prompt.
48. Default settings are in square brackets '[]'.
49. Continue with configuration dialog? [yes/no]: n
50.
51. !--- Type "n" for no.
52.
53. Press RETURN to get started.
54.
55. !--- Press Return or Enter.
56.
57. Switch>
58.
59. !--- The Switch> prompt is displayed.
60.
61.
At
the switch prompt, type en to enter enable mode.
62. Switch>en
Switch#
63.
Type rename
flash:config.old flash:config.text to
rename the configuration file with its original name.
64. Switch#rename flash:config.old flash:config.text
65. Destination filename [config.text]
66.
67. !--- Press Return or Enter.
68.
Switch#
69.
Copy
the configuration file into memory.
70. Switch#copy flash:config.text system:running-config
71. Destination filename [running-config]?
72.
73. !--- Press Return or Enter.
74.
75. 1131 bytes copied in 0.760 secs
Sw1#
The configuration file is now reloaded.
76.
Overwrite
the current passwords that you do not know. Choose a strong password with at
least one capital letter, one number, and one special character.
Note: Overwrite the passwords which are necessary. You need not
overwrite all of the mentioned passwords.
Sw1# conf t
!--- To overwrite existing secret password
Sw1(config)#enable secret <new_secret_password>
!--- To overwrite existing enable password
Sw1(config)#enable password <new_enable_password>
!--- To overwrite existing vty password
Sw1(config)#line vty 0 15
Sw1(config-line)#password <new_vty_password>
Sw1(config-line)#login
!--- To overwrite existing console password
Sw1(config-line)#line con 0
Sw1(config-line)#password <new_console_password>
77.
Write
the running configuration to the configuration file with the write memory command.
78. Sw1#write memory
79. Building configuration...
80. [OK]
Sw1#
No comments:
Post a Comment