[ 1876.285636][T21890] br0: port 1(dummy0) entered blocking state
[ 1876.285825][T21890] br0: port 1(dummy0) entered disabled state
[ 1876.285987][T21890] dummy0: entered allmulticast mode
[ 1876.287457][T21890] dummy0: entered promiscuous mode
[ 1876.309553][T21891] br0: port 1(dummy0) entered blocking state
[ 1876.309849][T21891] br0: port 1(dummy0) entered forwarding state
[ 1878.287649][   T12] dummy0: left allmulticast mode
[ 1878.288203][   T12] dummy0: left promiscuous mode
[ 1878.288770][   T12] br0: port 1(dummy0) entered disabled state