[ 2238.373398][ T8250] br0: port 1(dummy0) entered blocking state
[ 2238.373589][ T8250] br0: port 1(dummy0) entered disabled state
[ 2238.373755][ T8250] dummy0: entered allmulticast mode
[ 2238.374710][ T8250] dummy0: entered promiscuous mode
[ 2238.399137][ T8251] br0: port 1(dummy0) entered blocking state
[ 2238.399576][ T8251] br0: port 1(dummy0) entered forwarding state
[ 2240.739078][   T68] dummy0: left allmulticast mode
[ 2240.739787][   T68] dummy0: left promiscuous mode
[ 2240.740027][   T68] br0: port 1(dummy0) entered disabled state