Sniffer® Portable Professional User's Guide - NetScout

Defining Filters and Triggers
b For Stop Triggers, check the Automatically re-start
capture after stop field to restart capture automatically after
capture is stopped after a Stop Trigger event.
5 Check Repeat Mode to automatically repeat this trigger. This
option applies to both Start and Stop triggers.
6 Click OK.
Specifying a Capture Filter for a Trigger
To specify what capture filter to use when a capture is started
with a trigger:
1 Select Trigger Setup from the Capture menu.
2 In the Start Trigger section, check the Enable checkbox.
3 Select a trigger from the pull-down list. If you want to create a new
trigger, click Define.
4 Select the capture filter you want from the Capture Filter pull-down
list. (If you want to create a new capture filter, cancel from the
Trigger Setup dialog box and select Define Filter from the Capture
menu. Then return to the Trigger Setup dialog box and continue.)
5 Click OK.
Capture Trigger Example
The following example shows how an event filter (seeing any Telnet
packet) can be used to trigger the start of a packet capture. Then, after
either 60 minutes has elapsed or a predefined IP address is detected,
the packet capture continues for 3,000 packets, and then the capture
stops.
This example assumes that filters have already been defined
for a Telnet packet and a known IP address:
1 From the Capture menu, select Trigger Setup to open the Trigger
Setup dialog box.
2 Check the Enable check box of the Start Trigger section, and click
the Define button. A Start Trigger dialog box appears.
3 Click New to invoke a New Trigger dialog box.
4 Enter the name of the start trigger, in this example, Start Trigger
Sample.
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