以下是來自 man brctl 的說明:
brctl setfd sets the bridge’s ‘bridge forward delay’ to seconds.
brctl sethello sets the bridge’s ‘bridge hello time’ to seconds.
brctl setmaxage sets the bridge’s ‘maximum message age’ to seconds.
brctl setpathcost sets the port cost of the port to . This is a dimensionless
brctl setportprio sets the port ‘s priority to . The priority value is
an unsigned 8-bit quantity (a number between 0 and 255), and has no dimension. This metric is used in the desig‐
nated port and root port selection algorithms.