[ 1878.504851] br0: port 1(dummy0) entered blocking state
[ 1878.504925] br0: port 1(dummy0) entered disabled state
[ 1878.504990] dummy0: entered allmulticast mode
[ 1878.505071] dummy0: entered promiscuous mode
[ 1878.508578] br0: port 1(dummy0) entered blocking state
[ 1878.508607] br0: port 1(dummy0) entered forwarding state
[ 1878.748721] dummy0: left allmulticast mode
[ 1878.748750] dummy0: left promiscuous mode
[ 1878.748777] br0: port 1(dummy0) entered disabled state