[ 1889.538610] br0: port 1(dummy0) entered blocking state
[ 1889.538694] br0: port 1(dummy0) entered disabled state
[ 1889.538764] dummy0: entered allmulticast mode
[ 1889.538846] dummy0: entered promiscuous mode
[ 1889.542347] br0: port 1(dummy0) entered blocking state
[ 1889.542387] br0: port 1(dummy0) entered forwarding state
[ 1889.786571] dummy0: left allmulticast mode
[ 1889.786665] dummy0: left promiscuous mode
[ 1889.786728] br0: port 1(dummy0) entered disabled state