[ 1600.263073] br0: port 1(dummy0) entered blocking state
[ 1600.263110] br0: port 1(dummy0) entered disabled state
[ 1600.263148] dummy0: entered allmulticast mode
[ 1600.263198] dummy0: entered promiscuous mode
[ 1600.266099] br0: port 1(dummy0) entered blocking state
[ 1600.266163] br0: port 1(dummy0) entered forwarding state
[ 1600.456365] dummy0: left allmulticast mode
[ 1600.456399] dummy0: left promiscuous mode
[ 1600.456429] br0: port 1(dummy0) entered disabled state