B-1
Cisco ASDM User Guide
OL-16647-01
APPENDIX
B

Troubleshooting

This appendix describes how to troubleshoot the security appliance, and includes the following sections:
Testing Your Configuration, page B-1
Reloading the Security Appliance, page B-6
Performing Password Recovery, page B-7
Using the ROM Monitor to Load a Software Image, page B-10
Erasing the Flash File System, page B-11
Other Troubleshooting Tools, page B-12
Common Problems, page B-13

Testing Your Configuration

This section describes how to test connectivity for the single mode security appliance or for each security
context, how to ping the security appliance interfaces, and how to allow hosts on one interface to ping
through to hosts on another interface.
We recommend that you only enable pinging and debug messages during troubleshooting. When you are
done testing the security appliance, follow the steps in “Disabling the Test Configuration” section on
page B-5.
This section includes the following topics:
Enabling ICMP Debug Messages and System Log Messages, page B-1
Pinging Security Appliance Interfaces, page B-2
Pinging Through the Security Appliance, page B-4
Disabling the Test Configuration, page B-5
Enabling ICMP Debug Messages and System Log Messages
Debug messages and system log messages can help you troubleshoot why your pings are not successful.
The security appliance only shows ICMP debug messages for pings to the security appliance interfaces,
and not for pings through the security appliance to other hosts. To enable debugging and system log
messages, perform the following steps: