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Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
OL-29168-01
Chapter17 Administrative Tasks for the Sensor
Configuring the System Clock
sensor# clear events
Warning: Executing this command will remove all events currently stored in the event
store.
Continue with clear? []:
Step 3
Enter
yes
to clear the events.
Configuring the System Clock
This section explains how to display and manually set the system clock. It contains the following topics:
•
Displaying the System Clock, page 17-24
•
Manually Setting the System Clock, page 17-25

Displaying the System Clock

Use the show clock [detail] command to display the system clock. You can use the detail option to
indicate the clock source (NTP or system) and the current summertime setting (if any). The system clock
keeps an authoritative flag that indicates whether the time is authoritative (believed to be accurate). If
the system clock has been set by a timing source, such as NTP, the flag is set.
Table 17-3 lists the system clock flags.
To display the system clock, follow these steps:
Step 1
Log in to the CLI.
Step 2
Display the system clock.
sensor# show clock
*19:04:52 UTC Thu Apr 03 2008
Step 3
Display the system clock with details. The following example indicates that the sensor is getting its time
from NTP and that is configured and synchronized.
sensor# show clock detail
20:09:43 UTC Thu Apr 03 2011
Time source is NTP
Summer time starts 03:00:00 UTC Sun Mar 09 2011
Summer time stops 01:00:00 UTC Sun Nov 02 2011
Step 4
Display the system clock with details. The following example indicates that no time source is configured.
sensor# show clock detail
*20:09:43 UTC Thu Apr 03 2011
Table17-3 System Clock Flags
Symbol Description
* Time is not authoritative.
(blank) Time is authoritative.
. Time is authoritative, but NTP is not synchronized.