This parameter determines the minimum access
priority used for outoing frames on this port.
End systems usually have a low access priority
while bridges have a medium priority. This
allows bridge, which typically handle larger
volumes of data, to get the token faster than
end systems. If the user priority of the frame
is greateer than the minumum access priority, the
user priority is used as the access priority. The
user priority of the frame is determined by the
access priority of the incoming frame.