Using Variable Line Pattern in a paragraph parser is to parse variables inside each recurring paragraph that has been identified by ID Line Pattern.
For example, to parse metrics like input errors, CRC errors, etc., for each interface of which the MTU’s value is 1500 bytes, you can define “$int:input_err input errors, $int:crc CRC, $int:frame frame, $int:overrun overrun” as the Variable Line Pattern.
As shown above, the line of text that matches the variable line pattern is highlighted and labeled with numberings. For example, “Var Line 1” refers to the Variable Line Pattern 1. Variables are also differentiated with a foreground color.