[ 1749.746497] br0: port 1(dummy0) entered blocking state
[ 1749.746535] br0: port 1(dummy0) entered disabled state
[ 1749.746570] dummy0: entered allmulticast mode
[ 1749.746633] dummy0: entered promiscuous mode
[ 1749.749352] br0: port 1(dummy0) entered blocking state
[ 1749.749391] br0: port 1(dummy0) entered forwarding state
[ 1749.940350] dummy0: left allmulticast mode
[ 1749.940429] dummy0: left promiscuous mode
[ 1749.940491] br0: port 1(dummy0) entered disabled state