[ 1571.149570] br0: port 1(dummy0) entered blocking state
[ 1571.149612] br0: port 1(dummy0) entered disabled state
[ 1571.149646] dummy0: entered allmulticast mode
[ 1571.149694] dummy0: entered promiscuous mode
[ 1571.152547] br0: port 1(dummy0) entered blocking state
[ 1571.152609] br0: port 1(dummy0) entered forwarding state
[ 1571.344354] dummy0: left allmulticast mode
[ 1571.344391] dummy0: left promiscuous mode
[ 1571.344422] br0: port 1(dummy0) entered disabled state