[ 1748.812450] br0: port 1(dummy0) entered blocking state
[ 1748.812523] br0: port 1(dummy0) entered disabled state
[ 1748.812587] dummy0: entered allmulticast mode
[ 1748.812671] dummy0: entered promiscuous mode
[ 1748.815198] br0: port 1(dummy0) entered blocking state
[ 1748.815232] br0: port 1(dummy0) entered forwarding state
[ 1749.006708] dummy0: left allmulticast mode
[ 1749.006738] dummy0: left promiscuous mode
[ 1749.006764] br0: port 1(dummy0) entered disabled state