[ 2070.876841][ T8255] br0: port 1(dummy0) entered blocking state
[ 2070.877031][ T8255] br0: port 1(dummy0) entered disabled state
[ 2070.877199][ T8255] dummy0: entered allmulticast mode
[ 2070.878143][ T8255] dummy0: entered promiscuous mode
[ 2070.903477][ T8256] br0: port 1(dummy0) entered blocking state
[ 2070.903739][ T8256] br0: port 1(dummy0) entered forwarding state
[ 2072.930772][   T12] dummy0: left allmulticast mode
[ 2072.931828][   T12] dummy0: left promiscuous mode
[ 2072.932067][   T12] br0: port 1(dummy0) entered disabled state