[ 1821.449437] br0: port 1(dummy0) entered blocking state
[ 1821.449497] br0: port 1(dummy0) entered disabled state
[ 1821.449560] dummy0: entered allmulticast mode
[ 1821.449612] dummy0: entered promiscuous mode
[ 1821.453357] br0: port 1(dummy0) entered blocking state
[ 1821.453394] br0: port 1(dummy0) entered forwarding state
[ 1821.724909] dummy0: left allmulticast mode
[ 1821.724950] dummy0: left promiscuous mode
[ 1821.725043] br0: port 1(dummy0) entered disabled state