$ ifconfig bridge0
bridge0: flags=8043<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
	ether ac:de:xx:4a:97:5d
	priority 32768 hellotime 2 fwddelay 15 maxage 20
	member: sis1 flags=3<LEARNING,DISCOVER>
	member: sis0 flags=3<LEARNING,DISCOVER>