[ 1821.154073] br0: port 1(dummy0) entered blocking state
[ 1821.154110] br0: port 1(dummy0) entered disabled state
[ 1821.154151] dummy0: entered allmulticast mode
[ 1821.154198] dummy0: entered promiscuous mode
[ 1821.157441] br0: port 1(dummy0) entered blocking state
[ 1821.157473] br0: port 1(dummy0) entered forwarding state
[ 1821.364731] dummy0: left allmulticast mode
[ 1821.364759] dummy0: left promiscuous mode
[ 1821.364788] br0: port 1(dummy0) entered disabled state