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E-21
Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1
OL-24002-01
Appendix E Troubleshooting
Troubleshooting the Appliance
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You can configure a maximum of two external product devices.
For More Information
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For more information on working with OS maps and identifications, refer to Adding, Editing,
Deleting, and Moving Configured OS Maps and Adding, Editing, Deleting, and Moving Configured
OS Maps.
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For the procedure for adding trusted hosts, refer to Adding TLS Trusted Hosts.
External Product Interfaces Troubleshooting Tips
To troubleshoot external product interfaces, check the following:
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Make sure the interface is active by checking the output from the show statistics
external-product-interface command in the CLI, or choose .
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Make sure you have added the CSA MC IP address to the trusted hosts. If you forgot to add it, add
it, wait a few minutes and then check again.
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Confirm subscription login information by opening and closing a subscription on the CSA MC using
the browser.
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Check the Event Store for the CSA MC subscription errors.
For More Information
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For the procedure for adding trusted hosts, refer to Adding TLS Trusted Hosts.
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For the procedure for displaying events, refer to Displaying Events.
Troubleshooting the Appliance
This section contains information to troubleshoot the appliance. It contains the following topics:
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The Appliance and Jumbo Packet Frame Size, page E-22
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Hardware Bypass and Link Changes and Drops, page E-22
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Troubleshooting Loose Connections, page E-22
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Analysis Engine is Busy, page E-23
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Communication Problems, page E-23
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Communication Problems, page E-23
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The SensorApp and Alerting, page E-28
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Blocking, page E-35
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Logging, page E-44
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TCP Reset Not Occurring for a Signature, page E-50
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Software Upgrades, page E-51
Tip
Before troubleshooting the appliance, check the Caveats section of the Readme for the software
version you have installed on your sensor to see if you are dealing with a known issue.