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C-108
Cisco Intrusion Prevention System CLI Sensor Configuration Guide for IPS 7.1
OL-19892-01
Appendix C Troubleshooting
Gathering Information
Understanding the show events Command
Note The Event Store has a fixed size of 30 MB for all platforms.
The show events command is useful for troubleshooting event capture issues in which you are not seeing
events in Event Viewer or Security Monitor. You can use the show events command to determine which
events are being generated on the sensor to make sure events are being generated and that the fault lies
with the monitoring side.
You can clear all events from Event Store by using the clear events command.
Here are the parameters for the show events command:
sensor# show events
<cr>
alert Display local system alerts.
error Display error events.
hh:mm[:ss] Display start time.
log Display log events.
nac Display NAC shun events.
past Display events starting in the past specified time.
status Display status events.
| Output modifiers.
Displaying Events
Note The Event Store has a fixed size of 30 MB for all platforms.
Note Events are displayed as a live feed. To cancel the request, press Ctrl-C.
Use the show events [{alert [informational] [low] [medium] [high] [include-traits traits]
[exclude-traits trai ts] [min-threat-rating min-rr] [max-threat-rating max-rr] | error [warning]
[error] [fatal] | NAC | status}] [hh:mm:ss [month day [year]] | past hh:mm:ss] command to display
events from Event Store. Events are displayed beginning at the start time. If you do not specify a start
time, events are displayed beginning at the current time. If you do not specify an event type, all events
are displayed. The following options apply:
• alert—Displays alerts. Provides notification of some suspicious activity that may indicate an attack
is in process or has been attempted. Alert events are generated by the Analysis Engine whenever a
signature is triggered by network activity. If no level is selected (informational, low, medium, or
high), all alert events are displayed.
• include-traits—Displays alerts that have the specified traits.
• exclude-traits—Does not display alerts that have the specified traits.
• traits—Specifies the trait bit position in decimal (0 to 15).
• min-threat-rating—Displays events with a threat rating above or equal to this value. The default is
0. The valid range is 0 to 100.
• max-threat-rating—Displays events with a threat rating below or equal to this value. The default
is 100. The valid range is 0 to 100.