[ 1721.111382] br0: port 1(dummy0) entered blocking state
[ 1721.111429] br0: port 1(dummy0) entered disabled state
[ 1721.111464] dummy0: entered allmulticast mode
[ 1721.111511] dummy0: entered promiscuous mode
[ 1721.113949] br0: port 1(dummy0) entered blocking state
[ 1721.113988] br0: port 1(dummy0) entered forwarding state
[ 1721.292688] dummy0: left allmulticast mode
[ 1721.292717] dummy0: left promiscuous mode
[ 1721.292744] br0: port 1(dummy0) entered disabled state