[ 1638.523824] br0: port 1(dummy0) entered blocking state
[ 1638.523903] br0: port 1(dummy0) entered disabled state
[ 1638.523972] dummy0: entered allmulticast mode
[ 1638.524059] dummy0: entered promiscuous mode
[ 1638.526835] br0: port 1(dummy0) entered blocking state
[ 1638.526870] br0: port 1(dummy0) entered forwarding state
[ 1638.713584] dummy0: left allmulticast mode
[ 1638.713668] dummy0: left promiscuous mode
[ 1638.713733] br0: port 1(dummy0) entered disabled state