[ 1748.772182] br0: port 1(dummy0) entered blocking state
[ 1748.772235] br0: port 1(dummy0) entered disabled state
[ 1748.772265] dummy0: entered allmulticast mode
[ 1748.772309] dummy0: entered promiscuous mode
[ 1748.775098] br0: port 1(dummy0) entered blocking state
[ 1748.775136] br0: port 1(dummy0) entered forwarding state
[ 1748.961293] dummy0: left allmulticast mode
[ 1748.961345] dummy0: left promiscuous mode
[ 1748.961373] br0: port 1(dummy0) entered disabled state