[ 1612.253291] br0: port 1(dummy0) entered blocking state
[ 1612.253371] br0: port 1(dummy0) entered disabled state
[ 1612.253437] dummy0: entered allmulticast mode
[ 1612.253540] dummy0: entered promiscuous mode
[ 1612.256129] br0: port 1(dummy0) entered blocking state
[ 1612.256166] br0: port 1(dummy0) entered forwarding state
[ 1612.442025] dummy0: left allmulticast mode
[ 1612.442063] dummy0: left promiscuous mode
[ 1612.442152] br0: port 1(dummy0) entered disabled state