Password Recovery Procedure for the Cisco Catalyst Fixed Configuration Layer 2 and Layer 3 Switches
Document ID: 12040
Introduction Before You Begin Conventions Prerequisites Step−by−Step Procedure Related Information
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
For more information on document conventions, see the Cisco Technical Tips Conventions.
There are no specific prerequisites for this document.
Follow the password recovery procedure below. 1. Attach aterminal 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 CatalystSwitches. 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 2900XL, 3500XL, 3550 2940, 2950
LED Behavior and Mode Button ReleaseAction Release the Mode button when the LED above Port1x goes out. 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. 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. Release the Mode button afterapproximately 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
For 2955 series switches only: The Catalyst 2955 series switches do not use an external mode button for password recovery. Instead the switch boot loaderuses 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. Theexample 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: 19 files, 2 directories flashfs: 0 orphaned files, 0 orphaneddirectories flashfs: Total bytes: 7741440 flashfs: Bytes used: 4510720 flashfs: Bytes available: 3230720 flashfs: 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 seethis 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 finis loading the operating system software: flash_init load_helper boot switch:
4. Issue the flash_init command.
switch: flash_init Initializing Flash...
flashfs: 143 files, 4 directories flashfs: 0...
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