[ 2161.230144][ T9873] br0: port 1(dummy0) entered blocking state
[ 2161.230347][ T9873] br0: port 1(dummy0) entered disabled state
[ 2161.230509][ T9873] dummy0: entered allmulticast mode
[ 2161.231863][ T9873] dummy0: entered promiscuous mode
[ 2161.258266][ T9874] br0: port 1(dummy0) entered blocking state
[ 2161.258440][ T9874] br0: port 1(dummy0) entered forwarding state
[ 2163.284273][   T12] dummy0: left allmulticast mode
[ 2163.284449][   T12] dummy0: left promiscuous mode
[ 2163.285033][   T12] br0: port 1(dummy0) entered disabled state