[ 2014.833749][T21455] br0: port 1(dummy0) entered blocking state
[ 2014.833929][T21455] br0: port 1(dummy0) entered disabled state
[ 2014.834093][T21455] dummy0: entered allmulticast mode
[ 2014.835090][T21455] dummy0: entered promiscuous mode
[ 2014.857901][T21456] br0: port 1(dummy0) entered blocking state
[ 2014.858618][T21456] br0: port 1(dummy0) entered forwarding state
[ 2016.855772][   T68] dummy0: left allmulticast mode
[ 2016.857472][   T68] dummy0: left promiscuous mode
[ 2016.857718][   T68] br0: port 1(dummy0) entered disabled state