[ 2201.300288][ T7542] br0: port 1(dummy0) entered blocking state
[ 2201.300650][ T7542] br0: port 1(dummy0) entered disabled state
[ 2201.301009][ T7542] dummy0: entered allmulticast mode
[ 2201.302581][ T7542] dummy0: entered promiscuous mode
[ 2201.333245][ T7543] br0: port 1(dummy0) entered blocking state
[ 2201.333764][ T7543] br0: port 1(dummy0) entered forwarding state
[ 2203.866593][   T12] dummy0: left allmulticast mode
[ 2203.867577][   T12] dummy0: left promiscuous mode
[ 2203.867925][   T12] br0: port 1(dummy0) entered disabled state