[ 1909.413142] br0: port 1(dummy0) entered blocking state
[ 1909.413212] br0: port 1(dummy0) entered disabled state
[ 1909.413280] dummy0: entered allmulticast mode
[ 1909.413364] dummy0: entered promiscuous mode
[ 1909.417063] br0: port 1(dummy0) entered blocking state
[ 1909.417097] br0: port 1(dummy0) entered forwarding state
[ 1909.680976] dummy0: left allmulticast mode
[ 1909.681072] dummy0: left promiscuous mode
[ 1909.681128] br0: port 1(dummy0) entered disabled state