[ 1903.132931] br0: port 1(dummy0) entered blocking state
[ 1903.133016] br0: port 1(dummy0) entered disabled state
[ 1903.133086] dummy0: entered allmulticast mode
[ 1903.133171] dummy0: entered promiscuous mode
[ 1903.136850] br0: port 1(dummy0) entered blocking state
[ 1903.136884] br0: port 1(dummy0) entered forwarding state
[ 1903.394039] dummy0: left allmulticast mode
[ 1903.394077] dummy0: left promiscuous mode
[ 1903.394159] br0: port 1(dummy0) entered disabled state