Compound Variable

+

Merge two string-type variables.

$routing = $bgp_config + $ospf_config

==

Equals specified string.

$a==$b?1:0

!==

Not equals specified string.

$a!==$b?1:0

+

Add two number-type variables.

$error = $input_error + $output_error

-

Subtract two number-type variables.

$error = $input_error - $output_error

*

Multiply two number-type variables.

$a*$b

/

Divide two number-type variables.

$a/$b

>

Judge whether the value of a number-type variable is greater than that of another one.

$cpu > 90

>=

Judge whether the value of a number-type variable is equal to or greater than that of another one.

$a>=$b

<

Judge whether the value of a number-type variable is less than that of another one.

$a<$b

<=

Judge whether the value of a number-type variable is equal to or less than that of another one.

$a<=$b

==

Judge whether the values of two number-type variables equal.

$a==$b

!=

Judge whether the values of two number-type variables don't equal.

$a!=$b

abs

Absolute value of the number-type variables.

abs(-10)

and

bool and bool

or

bool or bool

not

not bool

GetTableRowCount

Get the table row count for a table

BGP neighbor count defined by：

$GetTableRowCount($BGP_Neighbor)

GetLastValue

Get the last value of the parser variables

CRC error increase count defined by:

$CRC_error - GetLastValue($CRC_error)

GetLastRowCount

Get the last table row count during last data retrieval

Rout Table Change Count

abs(GetTableRowCount($Route_table) – GetLastRowCount($Route_table)