[ 1848.994571][ T6570] br0: port 1(dummy0) entered blocking state
[ 1848.994772][ T6570] br0: port 1(dummy0) entered disabled state
[ 1848.994936][ T6570] dummy0: entered allmulticast mode
[ 1848.995928][ T6570] dummy0: entered promiscuous mode
[ 1849.021789][ T6571] br0: port 1(dummy0) entered blocking state
[ 1849.022040][ T6571] br0: port 1(dummy0) entered forwarding state
[ 1850.984753][   T12] dummy0: left allmulticast mode
[ 1850.985090][   T12] dummy0: left promiscuous mode
[ 1850.985394][   T12] br0: port 1(dummy0) entered disabled state