[ 1771.282507] br0: port 1(dummy0) entered blocking state
[ 1771.282552] br0: port 1(dummy0) entered disabled state
[ 1771.282585] dummy0: entered allmulticast mode
[ 1771.282642] dummy0: entered promiscuous mode
[ 1771.286221] br0: port 1(dummy0) entered blocking state
[ 1771.286293] br0: port 1(dummy0) entered forwarding state
[ 1771.555647] dummy0: left allmulticast mode
[ 1771.555747] dummy0: left promiscuous mode
[ 1771.555810] br0: port 1(dummy0) entered disabled state