[ 1855.307542] br0: port 1(dummy0) entered blocking state
[ 1855.307576] br0: port 1(dummy0) entered disabled state
[ 1855.307599] dummy0: entered allmulticast mode
[ 1855.307634] dummy0: entered promiscuous mode
[ 1855.311458] br0: port 1(dummy0) entered blocking state
[ 1855.311480] br0: port 1(dummy0) entered forwarding state
[ 1855.591285] dummy0: left allmulticast mode
[ 1855.591312] dummy0: left promiscuous mode
[ 1855.591334] br0: port 1(dummy0) entered disabled state