[ 1912.571565] br0: port 1(dummy0) entered blocking state
[ 1912.571640] br0: port 1(dummy0) entered disabled state
[ 1912.571707] dummy0: entered allmulticast mode
[ 1912.571788] dummy0: entered promiscuous mode
[ 1912.576123] br0: port 1(dummy0) entered blocking state
[ 1912.576223] br0: port 1(dummy0) entered forwarding state
[ 1912.865544] dummy0: left allmulticast mode
[ 1912.865590] dummy0: left promiscuous mode
[ 1912.865641] br0: port 1(dummy0) entered disabled state