[ 1748.557361] br0: port 1(dummy0) entered blocking state
[ 1748.557395] br0: port 1(dummy0) entered disabled state
[ 1748.557416] dummy0: entered allmulticast mode
[ 1748.557452] dummy0: entered promiscuous mode
[ 1748.561083] br0: port 1(dummy0) entered blocking state
[ 1748.561107] br0: port 1(dummy0) entered forwarding state
[ 1748.832742] dummy0: left allmulticast mode
[ 1748.832765] dummy0: left promiscuous mode
[ 1748.832784] br0: port 1(dummy0) entered disabled state