[ 1712.288574] br0: port 1(dummy0) entered blocking state
[ 1712.288620] br0: port 1(dummy0) entered disabled state
[ 1712.288654] dummy0: entered allmulticast mode
[ 1712.288708] dummy0: entered promiscuous mode
[ 1712.292000] br0: port 1(dummy0) entered blocking state
[ 1712.292034] br0: port 1(dummy0) entered forwarding state
[ 1712.502034] dummy0: left allmulticast mode
[ 1712.502078] dummy0: left promiscuous mode
[ 1712.502136] br0: port 1(dummy0) entered disabled state