The value to be used as the Max Age in this TrCRF.
The range for this parameter is 600 to 4000 and is related
to the value of dtrSpanningTreeBridgeHelloTime. See
802.1D-1990 for the relationship between dot1dStpBridgeMaxAge
and dot1dStpBridgeHelloTime. The granularity of this timer
is specified to be 1/100 of a second. This agent will return
a 'badValue' error if a set is attempted to a value which
is not a whole number of seconds.