Just got a used Catalyst 3500-XL switch and don’t have credentials? Did you forget your auth credentials or you just want to have fun?
Accessing a Cisco switch when you don’t have the right credentials is hard but not impossible.
If you have issues connecting the console cable, try to install the drivers first.
This will work only if you have access to the box itself. If so, you’ll need to connect a rollover cable and follow the instructions:
Now you have to keep the Mode button pressed, while you plug the power cord to start the device.
You keep the button pressed till Port 1X light will be turned off.
After you release it, your prompt on the console connection will become
Here you have to initialize the flash image, by using the command:
You can browse the
flash: and check for
startup-config, then rename it to something else
switch: rename flash:/config.text flash:/config.text.old.
After that you’ll be able to boot the switch with
boot command. The IOS won’t be able to find the config file and it will default to Setup wizard. Just refuse it politely by typing
no and when the prompt will become
enable, restore the config file:
Switch#rename flash:/config.text.old flash:/config.text
Now you have to load the original config
Switch#copy flash:/config.text flash:/running-config and enter into
configure terminal to change the tricky password.
That’s all! Don’t forget to check config register and try to remember the password this time :)
switch: rename flash:/config.text flash:/config.text.old switch: dir flash: Directory of flash:/ 2 -rwx 1751867 <date> c3500XL-c3h2s-mz.120-5.WC3b.bin 3 -rwx 94370 <date> c3500XL-diag-mz-120-5.WC2a 4 -rwx 347 <date> env_vars 5 -rwx 109 <date> info 6 -rwx 25 <date> snmpengineid 7 drwx 640 <date> html 18 -rwx 109 <date> info.ver 19 -rwx 6218 <date> config.text.old 21 -rwx 616 <date> vlan.dat 349696 bytes available (3262976 bytes used) switch: boot Loading "flash:c3500XL-c3h2s-mz.120-5.WC3b.bin"...############################################ File "flash:c3500XL-c3h2s-mz.120-5.WC3b.bin" uncompressed and installed, entry poin executing... Restricted Rights Legend Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) of the Commercial Computer Software - Restricted Rights clause at FAR sec. 52.227-19 and subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at DFARS sec. 252.227-7013. cisco Systems, Inc. 170 West Tasman Drive San Jose, California 95134-1706 Cisco Internetwork Operating System Software IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC3b, RELEASE SOFTWARE Copyright (c) 1986-2002 by cisco Systems, Inc. Compiled Fri 15-Feb-02 10:51 by antonino Image text-base: 0x00003000, data-base: 0x00337600 Initializing C3500XL flash... flashfs: 19 files, 2 directories flashfs: 0 orphaned files, 0 orphaned directories flashfs: Total bytes: 3612672 flashfs: Bytes used: 3262976 flashfs: Bytes available: 349696 flashfs: flashfs fsck took 4 seconds. flashfs: Initialization complete. ...done Initializing C3500XL flash. C3500XL POST: System Board Test: Passed C3500XL POST: Daughter Card Test: Passed C3500XL POST: CPU Buffer Test: Passed C3500XL POST: CPU Notify RAM Test: Passed C3500XL POST: CPU Interface Test: Passed C3500XL POST: Testing Switch Core: Passed C3500XL POST: Testing Buffer Table: Passed C3500XL POST: Data Buffer Test: Passed C3500XL POST: Configuring Switch Parameters: Passed C3500XL POST: Ethernet Controller Test: Passed C3500XL POST: MII Test: Passed cisco WS-C3524-PWR-XL (PowerPC403) processor (revision 0x01) with 8192K/1024K bytes Processor board ID CHK0624W0BZ, with hardware revision 0x00 Last reset from power-on Processor is running Enterprise Edition Software Cluster command switch capable Cluster member switch capable 24 FastEthernet/IEEE 802.3 interface(s) 2 Gigabit Ethernet/IEEE 802.3 interface(s) 32K bytes of flash-simulated non-volatile configuration memory. ... C3500XL INIT: Complete 00:00:20: %SYS-5-RESTART: System restarted -- Cisco Internetwork Operating System Software IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC3b, RELEASE SOFTWARE Copyright (c) 1986-2002 by cisco Systems, Inc. Compiled Fri 15-Feb-02 10:51 by antonino --- 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]: no Press RETURN to get started. Switch>ena Switch# Switch#rename flash:config.text.old flash:config.text Destination filename [config.text]? Switch#copy flash:config.text system:/running-config Destination filename [running-config]? 6218 bytes copied in 2.753 secs (3109 bytes/sec) ORIGINAL-NAME#conf t ORIGINAL-NAME(conf)# enable secret ANOTHERPASSWORD