[ 1900.794297] br0: port 1(dummy0) entered blocking state
[ 1900.794376] br0: port 1(dummy0) entered disabled state
[ 1900.794441] dummy0: entered allmulticast mode
[ 1900.794523] dummy0: entered promiscuous mode
[ 1900.798195] br0: port 1(dummy0) entered blocking state
[ 1900.798228] br0: port 1(dummy0) entered forwarding state
[ 1901.063076] dummy0: left allmulticast mode
[ 1901.063137] dummy0: left promiscuous mode
[ 1901.063196] br0: port 1(dummy0) entered disabled state