[ 1753.203346] br0: port 1(dummy0) entered blocking state
[ 1753.203389] br0: port 1(dummy0) entered disabled state
[ 1753.203431] dummy0: entered allmulticast mode
[ 1753.203501] dummy0: entered promiscuous mode
[ 1753.207031] br0: port 1(dummy0) entered blocking state
[ 1753.207099] br0: port 1(dummy0) entered forwarding state
[ 1753.474876] dummy0: left allmulticast mode
[ 1753.474906] dummy0: left promiscuous mode
[ 1753.474936] br0: port 1(dummy0) entered disabled state