[ 1883.586467] br0: port 1(dummy0) entered blocking state
[ 1883.586500] br0: port 1(dummy0) entered disabled state
[ 1883.586537] dummy0: entered allmulticast mode
[ 1883.586587] dummy0: entered promiscuous mode
[ 1883.590074] br0: port 1(dummy0) entered blocking state
[ 1883.590139] br0: port 1(dummy0) entered forwarding state
[ 1883.833076] dummy0: left allmulticast mode
[ 1883.833142] dummy0: left promiscuous mode
[ 1883.833202] br0: port 1(dummy0) entered disabled state