The value used as the Forwarding Delay in this TrCRF.
The range for this parameter is 400 to 3000 and is related
to the value of dtrSpanningTreeBridgeMaxAge. See 802.1D-1990
for the relationship between dot1dStpBridgeMaxAge and
dot1dStpBridgeForwardDelay. 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.