Extreme Networks ExtremeWare XOS Guide Manual page 256

CLEARFlow
Count Rule Type
A CLEARFlow count rule compares a counter with the threshold value. The following is the syntax for
a CLEARFlow count rule:
entry <CLFrulename>
if { count <counterName> REL_OPER <countThreshold> ;
period <interval>;
}
then {
<actions>;
} else {
<actions>;
}
}
The statement specifies how to compare a counter with its threshold. The
count
name of an ACL counter referred to by an ACL rule entry and the
compared with the counter. The
great than or equal to, less than, or less than or equal to (>, >=, <, <=).
The
period <interval>
statement specifies how often the rule is evaluated by the CLEARFlow agent. If not specified, the
default value is 5 seconds.
The actions will be discussed in the section,
See the section, "Count Rule Type Example" on page
Delta Rule Type
A CLEARFlow delta rule computes the difference from one sample to the next of a counter value. This
difference is compared with the threshold value. The following is the syntax for a CLEARFlow delta
rule:
entry <CLFrulename>
if { delta <counterName> REL_OPER <countThreshold> ;
period <interval>;
hysterisis <hysterisis> ;
}
then {
<actions>;
} else {
<actions>;
}
}
The statement specifies how to compare the difference in a counter value from one sample to the
delta
next with its threshold. The
entry and the
<countThreshold>
sample to the next. The
REL_OPER
equal to, less than, or less than or equal to (>, >=, <, <=).
ExtremeWare XOS 11.1 Concepts Guide
{
is selected from the relational operators for greater than,
REL_OPER
statement is optional and sets the sampling interval, in seconds. This
"CLEARFlow Rule Actions" on page
{
is the name of an ACL counter referred to by an ACL rule
<counterName>
is the value compared with the difference in the counter from one
is selected from the relational operators for greater than, great than or
<countThreshold>
261, for an example.
is the
<counterName>
is the value
259.
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