[ 2157.304999][ T9475] br0: port 1(dummy0) entered blocking state
[ 2157.307895][ T9475] br0: port 1(dummy0) entered disabled state
[ 2157.308251][ T9475] dummy0: entered allmulticast mode
[ 2157.309905][ T9475] dummy0: entered promiscuous mode
[ 2157.350913][ T9476] br0: port 1(dummy0) entered blocking state
[ 2157.351317][ T9476] br0: port 1(dummy0) entered forwarding state
[ 2159.671646][   T12] dummy0: left allmulticast mode
[ 2159.671833][   T12] dummy0: left promiscuous mode
[ 2159.672063][   T12] br0: port 1(dummy0) entered disabled state