[ 1899.914537] br0: port 1(dummy0) entered blocking state
[ 1899.914583] br0: port 1(dummy0) entered disabled state
[ 1899.914625] dummy0: entered allmulticast mode
[ 1899.914675] dummy0: entered promiscuous mode
[ 1899.918087] br0: port 1(dummy0) entered blocking state
[ 1899.918150] br0: port 1(dummy0) entered forwarding state
[ 1900.177561] dummy0: left allmulticast mode
[ 1900.177589] dummy0: left promiscuous mode
[ 1900.177615] br0: port 1(dummy0) entered disabled state