[ 1693.539340] br0: port 1(dummy0) entered blocking state
[ 1693.539411] br0: port 1(dummy0) entered disabled state
[ 1693.539481] dummy0: entered allmulticast mode
[ 1693.539565] dummy0: entered promiscuous mode
[ 1693.542347] br0: port 1(dummy0) entered blocking state
[ 1693.542378] br0: port 1(dummy0) entered forwarding state
[ 1693.723685] dummy0: left allmulticast mode
[ 1693.723713] dummy0: left promiscuous mode
[ 1693.723740] br0: port 1(dummy0) entered disabled state