[ 1884.373436] br0: port 1(dummy0) entered blocking state
[ 1884.373487] br0: port 1(dummy0) entered disabled state
[ 1884.373522] dummy0: entered allmulticast mode
[ 1884.373573] dummy0: entered promiscuous mode
[ 1884.376744] br0: port 1(dummy0) entered blocking state
[ 1884.376779] br0: port 1(dummy0) entered forwarding state
[ 1884.620851] dummy0: left allmulticast mode
[ 1884.620897] dummy0: left promiscuous mode
[ 1884.620931] br0: port 1(dummy0) entered disabled state