[ 2098.398090][ T7930] br0: port 1(dummy0) entered blocking state
[ 2098.398539][ T7930] br0: port 1(dummy0) entered disabled state
[ 2098.398720][ T7930] dummy0: entered allmulticast mode
[ 2098.399779][ T7930] dummy0: entered promiscuous mode
[ 2098.428732][ T7931] br0: port 1(dummy0) entered blocking state
[ 2098.429380][ T7931] br0: port 1(dummy0) entered forwarding state
[ 2100.466081][   T12] dummy0: left allmulticast mode
[ 2100.466252][   T12] dummy0: left promiscuous mode
[ 2100.466485][   T12] br0: port 1(dummy0) entered disabled state