[ 1752.833470] br0: port 1(dummy0) entered blocking state
[ 1752.833548] br0: port 1(dummy0) entered disabled state
[ 1752.833622] dummy0: entered allmulticast mode
[ 1752.833723] dummy0: entered promiscuous mode
[ 1752.836488] br0: port 1(dummy0) entered blocking state
[ 1752.836518] br0: port 1(dummy0) entered forwarding state
[ 1753.017259] dummy0: left allmulticast mode
[ 1753.017303] dummy0: left promiscuous mode
[ 1753.017355] br0: port 1(dummy0) entered disabled state