[ 2234.442481][T21553] br0: port 1(dummy0) entered blocking state
[ 2234.443326][T21553] br0: port 1(dummy0) entered disabled state
[ 2234.443893][T21553] dummy0: entered allmulticast mode
[ 2234.444901][T21553] dummy0: entered promiscuous mode
[ 2234.477804][T21554] br0: port 1(dummy0) entered blocking state
[ 2234.478145][T21554] br0: port 1(dummy0) entered forwarding state
[ 2236.995354][   T12] dummy0: left allmulticast mode
[ 2236.995639][   T12] dummy0: left promiscuous mode
[ 2236.995957][   T12] br0: port 1(dummy0) entered disabled state