System information

Troubleshooting Security Implementations 24-493
Password-Recovery Procedure: IGS Running Software Prior to Software Release 9.1
Example:
The following example removes the password from virtual terminal lines 1 to 4:
line vty 1 4
no password
Step 11 Use the write memory privileged exec command to write the configuration into running
memory. Proceed to Step 13.
Step 12 If you have lost the enable password, locate the enable-password global configuration
command entry in the configuration and record the password.
If you have lost the login password, find the configuration entries for the console line and
record the password indicated by the password line configuration command. Do not
make configuration changes or use the write memory command at this time.
Step 13 Power down the router.
Step 14 Remove the processor card and move the hardware configuration register jumper from bit
position 15 to its original position (the position you noted in Step 2).
Step 15 Power up the router. Use your new or recovered password to gain access to the router.
Password-Recovery Procedure: IGS Running Software Prior to
Software Release 9.1
Cisco IGS routers have a bank of DIP switches located on the rear panel. These DIP switches are
used to set the hardware configuration register and must be used in the password-recovery process
if the router is running system software prior to Software Release 9.1.
Note If your password is encrypted, you cannot recover it. You must configure a new password.
Figure 24-3 shows the password-recovery procedure for the Cisco IGS running software prior to
Software Release 9.1. There is another procedure for the IGS platform if it is running Software
Release 9.1 or later. See the section “Password-Recovery Procedure: Platforms Running Current
Cisco IOS Releases.”
Note To complete this procedure, you must have a terminal or a personal computer (running
terminal emulation software) connected to the console port of the router.
Following is the password-recovery procedure for IGS routers running software prior to Software
Release 9.1:
Step 1 Power down the router.
Step 2 Record the settings of the DIP switches located on the rear panel of the router. You will
need to return these switches to their original positions after you have recovered your
password.