[ 1921.549806] br0: port 1(dummy0) entered blocking state
[ 1921.549853] br0: port 1(dummy0) entered disabled state
[ 1921.549884] dummy0: entered allmulticast mode
[ 1921.549943] dummy0: entered promiscuous mode
[ 1921.553335] br0: port 1(dummy0) entered blocking state
[ 1921.553366] br0: port 1(dummy0) entered forwarding state
[ 1921.811999] dummy0: left allmulticast mode
[ 1921.812062] dummy0: left promiscuous mode
[ 1921.812128] br0: port 1(dummy0) entered disabled state