The state of this port on this MSTI with respect to
the Loop Protect feature.
true(1) - this port is being held in the blocking state
by the Loop Protect feature.
false(2) - this port is not being held in the blocking
state by the Loop Protect feature.
When this object has a value of true(1) setting its value
to false(2) will cause the Loop Protect feature to no longer
hold the port in the blocking state.
All other set operations on this object are undefined and
MUST NOT have any effect.