[ 1622.729303] br0: port 1(dummy0) entered blocking state
[ 1622.729350] br0: port 1(dummy0) entered disabled state
[ 1622.729390] dummy0: entered allmulticast mode
[ 1622.729439] dummy0: entered promiscuous mode
[ 1622.732343] br0: port 1(dummy0) entered blocking state
[ 1622.732407] br0: port 1(dummy0) entered forwarding state
[ 1622.933257] dummy0: left allmulticast mode
[ 1622.933293] dummy0: left promiscuous mode
[ 1622.933328] br0: port 1(dummy0) entered disabled state