[ 1748.159088] br0: port 1(dummy0) entered blocking state
[ 1748.159129] br0: port 1(dummy0) entered disabled state
[ 1748.159167] dummy0: entered allmulticast mode
[ 1748.159220] dummy0: entered promiscuous mode
[ 1748.162818] br0: port 1(dummy0) entered blocking state
[ 1748.162880] br0: port 1(dummy0) entered forwarding state
[ 1748.435482] dummy0: left allmulticast mode
[ 1748.435520] dummy0: left promiscuous mode
[ 1748.435577] br0: port 1(dummy0) entered disabled state