The direction in which this rule applies. The value
'forward' means that the rule is applied to data streams
in the direction specified by the classification pattern.
The value 'backward' means that the rule is applied in
the reverse direction. The value 'any' means that the
rule is applied for traffic in either direction of data
flow. Note that the direction is applied to where the data
flow itself will go, not to the direction of any signaling
messages e.g. RSVP.
Only the value 'forward' is supported in ExtremeWare 6.0.