[ 1683.049436] br0: port 1(dummy0) entered blocking state
[ 1683.049508] br0: port 1(dummy0) entered disabled state
[ 1683.049551] dummy0: entered allmulticast mode
[ 1683.049634] dummy0: entered promiscuous mode
[ 1683.052639] br0: port 1(dummy0) entered blocking state
[ 1683.052723] br0: port 1(dummy0) entered forwarding state
[ 1683.246674] dummy0: left allmulticast mode
[ 1683.246713] dummy0: left promiscuous mode
[ 1683.246741] br0: port 1(dummy0) entered disabled state