[ 2000.313065][ T4510] br0: port 1(dummy0) entered blocking state
[ 2000.313259][ T4510] br0: port 1(dummy0) entered disabled state
[ 2000.313431][ T4510] dummy0: entered allmulticast mode
[ 2000.314735][ T4510] dummy0: entered promiscuous mode
[ 2000.343413][ T4511] br0: port 1(dummy0) entered blocking state
[ 2000.343670][ T4511] br0: port 1(dummy0) entered forwarding state
[ 2002.220178][   T12] dummy0: left allmulticast mode
[ 2002.221005][   T12] dummy0: left promiscuous mode
[ 2002.221240][   T12] br0: port 1(dummy0) entered disabled state