STP parameters settings:
STP State : Enable or disable STP function
Priority : A value used to identify the root bridge. The b ridge with the lowest value has the highest priority
and is selected as the root. Valid values : 1 through 65535.
Max Age : The number of seconds a bridge waits without receiving
Hello Time : The number of seconds between the transmission of
messages. Valid values : 1 ~ 10
Forward Delay time : The number of seconds a port waits before changing from its
Protocol learning and listening states to the forwarding state. Valid values : 4 ~ 30
