[ 1910.202676] br0: port 1(dummy0) entered blocking state
[ 1910.202714] br0: port 1(dummy0) entered disabled state
[ 1910.202756] dummy0: entered allmulticast mode
[ 1910.202810] dummy0: entered promiscuous mode
[ 1910.206092] br0: port 1(dummy0) entered blocking state
[ 1910.206123] br0: port 1(dummy0) entered forwarding state
[ 1910.447823] dummy0: left allmulticast mode
[ 1910.447858] dummy0: left promiscuous mode
[ 1910.447893] br0: port 1(dummy0) entered disabled state