This attribute indicates the current trace status of
the path.
The value is a sum which represents all of the trace
status information which applies. This value initially
takes the value zero, then for each condition which
applies, 2 raised to a power is added to the sum. the
powers are according to the following table:
TraceStatus Power
traceinitiated 0
tracepropragated 1
traceterminated 2
tracetimeout 3