[ 1837.175911] br0: port 1(dummy0) entered blocking state
[ 1837.175981] br0: port 1(dummy0) entered disabled state
[ 1837.176060] dummy0: entered allmulticast mode
[ 1837.176143] dummy0: entered promiscuous mode
[ 1837.179894] br0: port 1(dummy0) entered blocking state
[ 1837.179927] br0: port 1(dummy0) entered forwarding state
[ 1837.452133] dummy0: left allmulticast mode
[ 1837.452173] dummy0: left promiscuous mode
[ 1837.452202] br0: port 1(dummy0) entered disabled state