[ 1793.474463] br0: port 1(dummy0) entered blocking state
[ 1793.474509] br0: port 1(dummy0) entered disabled state
[ 1793.474545] dummy0: entered allmulticast mode
[ 1793.474595] dummy0: entered promiscuous mode
[ 1793.478607] br0: port 1(dummy0) entered blocking state
[ 1793.478683] br0: port 1(dummy0) entered forwarding state
[ 1793.763494] dummy0: left allmulticast mode
[ 1793.763533] dummy0: left promiscuous mode
[ 1793.763566] br0: port 1(dummy0) entered disabled state