[ 2160.981001][T20806] br0: port 1(dummy0) entered blocking state
[ 2160.981217][T20806] br0: port 1(dummy0) entered disabled state
[ 2160.981391][T20806] dummy0: entered allmulticast mode
[ 2160.982710][T20806] dummy0: entered promiscuous mode
[ 2161.014529][T20807] br0: port 1(dummy0) entered blocking state
[ 2161.014758][T20807] br0: port 1(dummy0) entered forwarding state
[ 2163.460261][   T12] dummy0: left allmulticast mode
[ 2163.460474][   T12] dummy0: left promiscuous mode
[ 2163.460708][   T12] br0: port 1(dummy0) entered disabled state