The number of seconds that a port will be held in the
blocking state by the SpanGuard feature. The value
zero indicates that ports will be held in the blocking
state until the entity is reset. Ports that are being
held in the blocking state can be returned to normal
service by writing the value of false(2) to their
respective etsysIetfBridgeDot1dBasePortSpanGuardBlocking
objects.