[ 2167.168052][T20312] br0: port 1(dummy0) entered blocking state
[ 2167.168270][T20312] br0: port 1(dummy0) entered disabled state
[ 2167.168432][T20312] dummy0: entered allmulticast mode
[ 2167.169306][T20312] dummy0: entered promiscuous mode
[ 2167.199496][T20313] br0: port 1(dummy0) entered blocking state
[ 2167.200109][T20313] br0: port 1(dummy0) entered forwarding state
[ 2169.194121][   T12] dummy0: left allmulticast mode
[ 2169.194806][   T12] dummy0: left promiscuous mode
[ 2169.195335][   T12] br0: port 1(dummy0) entered disabled state