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【cicsco网络技术】Cisco 2900 3550 2950 2960 3560 3750 交换机

(2012-12-10 14:27:35)
标签:

育儿

上海出差期间,有些老设备密码找不到了,于是对一些老设备进行密码恢复操作,这是官方的一个操作指南,摘录如下:

Cisco 2900 3550 2950 2960 3560 3750 交换机密码恢复指南

Contents

Introduction
Before You Begin
      Conventions
      Prerequisites
Step-by-Step Procedure
Related Information

Introduction

This document describes the password recovery procedure for the Cisco Catalyst Layer 2 fixed configuration switches 2900XL/3500XL, 2940, 2950/2955, 2960, and 2970 Series, as well as the Cisco Catalyst Layer 3 fixed configuration switches 3550, 3560, and 3750 Series.

Before You Begin

Conventions

For more information on document conventions.

Prerequisites

There are no specific prerequisites for this document.

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:

    • Bits per second (baud): 9600

    • Data bits: 8

    • Parity: None

    • Stop bits: 1

    • 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.

     

    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 Combinations

    Software

    Platform

    Operating System

    Try This

    Hyperterminal

    IBM Compatible

    Windows XP

    Ctrl-Break

    Hyperterminal

    IBM Compatible

    Windows 2000

    Ctrl-Break

    Hyperterminal

    IBM Compatible

    Windows 98

    Ctrl-Break

    Hyperterminal (version 595160)

    IBM Compatible

    Windows 95

    Ctrl-F6-Break

    Kermit

    Sun Workstation

    UNIX

    Ctrl-\l

    Ctrl-\b

    MicroPhone Pro

    IBM Compatible

    Windows

    Ctrl-Break

    Minicom

    IBM Compatible

    Linux

    Ctrl-a f

    ProComm Plus

    IBM Compatible

    DOS or Windows

    Alt-b

    SecureCRT

    IBM Compatible

    Windows

    Ctrl-Break

    Telix

    IBM Compatible

    DOS

    Ctrl-End

    Telnet

    N/A

    N/A

    Ctrl-], then type send brk

    Telnet to Cisco

    IBM Compatible

    N/A

    Ctrl-]

    Teraterm

    IBM Compatible

    Windows

    Alt-b

    Terminal

    IBM Compatible

    Windows

    Break

    Ctrl-Break

    Tip

    Sun Workstation

    UNIX

    Ctrl-], then Break or Ctrl-c

    ~#

    VT 100 Emulation

    Data General

    N/A

    F16

    Windows NT

    IBM Compatible

    Windows

    Break-F5

    Shift-F5

    Shift-6 Shift-4 Shift-b (^$B)

    Z-TERMINAL

    Mac

    Apple

    Command-b

    N/A

    Break-Out Box

    N/A

    Connect pin 2 (X-mit) to +V for half a second

    Cisco to aux port

    N/A

    Control-Shft-6, then b

    IBM Compatible

    N/A

    Ctrl-Break

     

    Tips to Troubleshoot

    • Problems that you encounter during password recovery often occur because you are not sure about what the break key sequence is for the (non-Cisco) software you use. For software not listed in the table, and for additional information, refer to the documentation of the individual software packages.

    • The auxiliary (AUX) port is not active during the boot sequence of a router. Therefore, it is no use if you send a break through the AUX port. You need to have connection to the console port, and have these settings:

      9600 baud rate

      No parity

      8 data bits

      1 stop bit

      No flow control

  4. 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:
    
  5. Issue the flash_init command.

    switch: flash_init
        Initializing Flash...
        flashfs[0]: 143 files, 4 directories
        flashfs[0]: 0 orphaned files, 0 orphaned directories
        flashfs[0]: Total bytes: 3612672
        flashfs[0]: Bytes used: 2729472
        flashfs[0]: Bytes available: 883200
        flashfs[0]: flashfs fsck took 86 seconds
        ....done Initializing Flash.
        Boot Sector Filesystem (bs:) installed, fsid: 3
        Parameter Block Filesystem (pb:) installed, fsid: 4
        switch:
        
        !--- This output is from a 2900XL switch. Output from
        !--- other switches will vary slightly.
        
        
    
  6. Issue the load_helper command.

    switch: load_helper
        switch:
    
  7. 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                  c3500xl-c3h2s-mz.120-5.WC7.bin
        
        !--- This is the current version of software.
        
        4    -rwx  1131                     config.text
        
        !--- This is the configuration file.
        
        5    -rwx  109                      info
        6    -rwx  389                      env_vars
        7    drwx  640                      html
        18   -rwx  109                      info.ver
        403968 bytes available (3208704 bytes used)
        switch:
        
        !--- This output is from a 3500XL switch. Output from
        !--- other switches will vary slightly.
        
        
    
  8. Type rename flash:config.text flash:config.old to rename the configuration file.

    switch: rename flash:config.text flash:config.old
        switch:
        
        !--- The config.text file contains the password
        !--- definition.
        
        
    
  9. Issue the boot command to boot the system.

    switch: boot
        Loading "flash:c3500xl-c3h2s-mz.120-5.WC7.bin"...###############################
        ################################################################################
        ######################################################################
        File "flash:c3500xl-c3h2s-mz.120-5.WC7.bin" uncompressed and installed, entry po
        int: 0x3000
        executing...
        
        !--- Output suppressed.
        !--- This output is from a 3500XL switch. Output from other switches
        !--- will vary slightly.
        
        
    
  10. Enter "n" at the prompt to abort the initial configuration dialog.

    --- System Configuration Dialog ---
        At any point you may enter a question mark '?' for help.
        Use ctrl-c to abort configuration dialog at any prompt.
        Default settings are in square brackets '[]'.
        Continue with configuration dialog? [yes/no]: n
        
        !--- Type "n" for no.
        
        Press RETURN to get started.
        
        !--- Press Return or Enter.
        
        Switch>
        
        !--- The Switch> prompt is displayed.
        
        
    
  11. At the switch prompt, type en to enter enable mode.

    Switch>en
        Switch#
    
  12. Type rename flash:config.old flash:config.text to rename the configuration file with its original name.

    Switch#rename flash:config.old flash:config.text
        Destination filename [config.text]
        
        !--- Press Return or Enter.
        
        Switch#
    
  13. Copy the configuration file into memory.

    Switch#copy flash:config.text system:running-config
        Destination filename [running-config]?
        
        !--- Press Return or Enter.
        
        1131 bytes copied in 0.760 secs
        Sw1#
    

    The configuration file is now reloaded.

  14. 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 
        
        
        !--- To overwrite existing enable password
        
        Sw1(config)#enable password 
        
        
        !--- To overwrite existing vty password
        
        Sw1(config)#line vty 0 15
        Sw1(config-line)#password 
        
        Sw1(config-line)#login
        
        !--- To overwrite existing console password
        
        Sw1(config-line)#line con 0
        Sw1(config-line)#password 
        
        
    
  15. Write the running configuration to the configuration file with the write memory command.

    Sw1#write memory
        Building configuration...
        [OK]
        Sw1#
    

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