[ 1856.947908] br0: port 1(dummy0) entered blocking state
[ 1856.947968] br0: port 1(dummy0) entered disabled state
[ 1856.948008] dummy0: entered allmulticast mode
[ 1856.948059] dummy0: entered promiscuous mode
[ 1856.951733] br0: port 1(dummy0) entered blocking state
[ 1856.951796] br0: port 1(dummy0) entered forwarding state
[ 1857.205613] dummy0: left allmulticast mode
[ 1857.205654] dummy0: left promiscuous mode
[ 1857.205718] br0: port 1(dummy0) entered disabled state