[ 1597.226388] br0: port 1(dummy0) entered blocking state
[ 1597.226432] br0: port 1(dummy0) entered disabled state
[ 1597.226459] dummy0: entered allmulticast mode
[ 1597.226506] dummy0: entered promiscuous mode
[ 1597.229401] br0: port 1(dummy0) entered blocking state
[ 1597.229433] br0: port 1(dummy0) entered forwarding state
[ 1597.454048] dummy0: left allmulticast mode
[ 1597.454086] dummy0: left promiscuous mode
[ 1597.454116] br0: port 1(dummy0) entered disabled state