Finisar Surveyor manual Actions for Display Filters, Counter Conditions for Filters

Capture and Display Filters 7

Filter Creation

Actions for Display Filters

Table 7-5 shows actions available for display filters:

	Table 7-5. Display Filter Actions
Action	Description
Display Packet	Display the resultant data.
Change Filter Operation	Go to a different filter state for processing the next incoming packet.
	The state can be the current state or any other state defined in the dis-
	play filter.

See Multi-State and Multi-Statement Filters for more information on actions in multi-state filters.

Counter Conditions for Filters

Press the Add Counter Condition… button to bring up a dialog box to create a counter condition. You specify a counter name and a value to test against. When you specify the counter condition and click the OK button, the counter condition appears in the Template Combination box. Counter conditions are only available with capture filters.

A counter condition is a special condition for accepting/rejecting a packet based on a counter value. Logically, a counter condition functions like a filter template. The settings for counters are “conditional flags” for subsequent actions. For example, set the counter name to “Counter 1." Set the test value in the >= field to l00. When Counter 1 reaches 100, the filter will carry out the actions that you have chosen for subsequent packets.

You can use a counter just like a filter template. For example, you could create the phrase FTP AND Counter 4 >= 20 in the Template Combination box. This would select FTP packets when Counter 4 reaches a value of 20. For THGm, one of seven custom counters can be used as the test counter.

The counter “test values” set in this window are global values. For multi-statement filters, if you set a counter test value in one statement, if you try to change it in another statement you will receive a warning message. See Multi-State Filters for more information on actions in multi-state filters.

Note that if you select the Add Counter Condition… box, choose a counter, but leave the “test value” set at 0, the result will be that the filter condition is always true and all actions will be taken immediately.

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