[ 1804.009825] br0: port 1(dummy0) entered blocking state
[ 1804.009880] br0: port 1(dummy0) entered disabled state
[ 1804.009935] dummy0: entered allmulticast mode
[ 1804.010008] dummy0: entered promiscuous mode
[ 1804.012898] br0: port 1(dummy0) entered blocking state
[ 1804.012919] br0: port 1(dummy0) entered forwarding state
[ 1804.207072] dummy0: left allmulticast mode
[ 1804.207105] dummy0: left promiscuous mode
[ 1804.207138] br0: port 1(dummy0) entered disabled state