[ 1689.251524] br0: port 1(dummy0) entered blocking state
[ 1689.251602] br0: port 1(dummy0) entered disabled state
[ 1689.251672] dummy0: entered allmulticast mode
[ 1689.251758] dummy0: entered promiscuous mode
[ 1689.254597] br0: port 1(dummy0) entered blocking state
[ 1689.254628] br0: port 1(dummy0) entered forwarding state
[ 1689.443305] dummy0: left allmulticast mode
[ 1689.443395] dummy0: left promiscuous mode
[ 1689.443457] br0: port 1(dummy0) entered disabled state