[ 1812.309055] br0: port 1(dummy0) entered blocking state
[ 1812.309132] br0: port 1(dummy0) entered disabled state
[ 1812.309202] dummy0: entered allmulticast mode
[ 1812.309296] dummy0: entered promiscuous mode
[ 1812.313387] br0: port 1(dummy0) entered blocking state
[ 1812.313418] br0: port 1(dummy0) entered forwarding state
[ 1812.586792] dummy0: left allmulticast mode
[ 1812.586837] dummy0: left promiscuous mode
[ 1812.586949] br0: port 1(dummy0) entered disabled state