[ 1869.234525][T21040] br0: port 1(dummy0) entered blocking state
[ 1869.234737][T21040] br0: port 1(dummy0) entered disabled state
[ 1869.234909][T21040] dummy0: entered allmulticast mode
[ 1869.236104][T21040] dummy0: entered promiscuous mode
[ 1869.261586][T21041] br0: port 1(dummy0) entered blocking state
[ 1869.261857][T21041] br0: port 1(dummy0) entered forwarding state
[ 1871.020778][   T12] dummy0: left allmulticast mode
[ 1871.021116][   T12] dummy0: left promiscuous mode
[ 1871.021396][   T12] br0: port 1(dummy0) entered disabled state