[ 1704.890809] br0: port 1(dummy0) entered blocking state
[ 1704.890896] br0: port 1(dummy0) entered disabled state
[ 1704.890965] dummy0: entered allmulticast mode
[ 1704.891050] dummy0: entered promiscuous mode
[ 1704.893971] br0: port 1(dummy0) entered blocking state
[ 1704.894004] br0: port 1(dummy0) entered forwarding state
[ 1705.103301] dummy0: left allmulticast mode
[ 1705.103344] dummy0: left promiscuous mode
[ 1705.103377] br0: port 1(dummy0) entered disabled state