ethFwdRstpBridgeMaxAge 1.3.6.1.4.1.2928.2.2.1.2.4.1.12

The value that all bridges use for MaxAge when this bridge is acting as the root. An agent may return a badValue error if a set is attempted to a value that is not a whole number of seconds, or it may truncate the value to a whole number of seconds.