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Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1
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Appendix E Troubleshooting
Troubleshooting the Appliance
Troubleshooting Loose Connections
Perform the following actions to troubleshoot loose connections on sensors:
• Make sure all power cords are securely connected.
• Make sure all cables are properly aligned and securely connected for all external and internal
components.
• Remove and check all data and power cables for damage. Make sure no cables have bent pins or
damaged connectors.
• Make sure each device is properly seated.
• If a device has latches, make sure they are completely closed and locked.
• Check any interlock or interconnect indicators that indicate a component is not connected properly.
• If problems continue, remove and reinstall each device, checking the connectors and sockets for bent
pins or other damage.
Analysis Engine is Busy
After you reimage a sensor, the Analysis Engine is busy rebuilding Regex tables and does not respond
to new configurations. You can check whether the Analysis Engine is busy by using the show statistics
virtual-sensor command. You receive the following error message if the Analysis Engine is busy:
sensor# show statistics virtual-sensor
Error: getVirtualSensorStatistics : Analysis Engine is busy rebuilding regex tables. This
may take a while.
sensor#
When the Analysis Engine is busy rebuilding Regex tables, you receive an error message if you try to
update a configuration, for example, enabling or retiring a signature:
sensor# configure terminal
sensor(config)# service sig sig0
sensor(config-sig)# sig 2000 0
sensor(config-sig-sig)# status enabled
sensor(config-sig-sig)# status
sensor(config-sig-sig-sta)# enabled true
sensor(config-sig-sig-sta)# retired false
sensor(config-sig-sig-sta)# exit
sensor(config-sig-sig)# exit
sensor(config-sig)# exit
Apply Changes?[yes]:
Error: editConfigDeltaSignatureDefinition : Analysis Engine is busy rebuilding regex
tables. This may take a while.
The configuration changes failed validation, no changes were applied.
Would you like to return to edit mode to correct the errors? [yes]: no
No changes were made to the configuration.
sensor(config)#
If you try to get the virtual sensor statistics immediately after you boot a sensor, you receive an error
message. Although the sensor has rebuilt the cache files, the virtual sensor is not finished initializing.
sensor# show statistics virtual-sensor
Error: getVirtualSensorStatistics : Analysis Engine is busy.
sensor#
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