[ 1851.258411] br0: port 1(dummy0) entered blocking state
[ 1851.258467] br0: port 1(dummy0) entered disabled state
[ 1851.258507] dummy0: entered allmulticast mode
[ 1851.258575] dummy0: entered promiscuous mode
[ 1851.262097] br0: port 1(dummy0) entered blocking state
[ 1851.262163] br0: port 1(dummy0) entered forwarding state
[ 1851.530233] dummy0: left allmulticast mode
[ 1851.530301] dummy0: left promiscuous mode
[ 1851.530363] br0: port 1(dummy0) entered disabled state