[ 1900.679026][  T399] br0: port 1(dummy0) entered blocking state
[ 1900.679226][  T399] br0: port 1(dummy0) entered disabled state
[ 1900.679396][  T399] dummy0: entered allmulticast mode
[ 1900.680633][  T399] dummy0: entered promiscuous mode
[ 1900.703452][  T400] br0: port 1(dummy0) entered blocking state
[ 1900.703914][  T400] br0: port 1(dummy0) entered forwarding state
[ 1902.618407][   T12] dummy0: left allmulticast mode
[ 1902.619440][   T12] dummy0: left promiscuous mode
[ 1902.619699][   T12] br0: port 1(dummy0) entered disabled state