[ 1870.688526][T20914] br0: port 1(dummy0) entered blocking state
[ 1870.688761][T20914] br0: port 1(dummy0) entered disabled state
[ 1870.688993][T20914] dummy0: entered allmulticast mode
[ 1870.690089][T20914] dummy0: entered promiscuous mode
[ 1870.723634][T20915] br0: port 1(dummy0) entered blocking state
[ 1870.724259][T20915] br0: port 1(dummy0) entered forwarding state
[ 1872.691891][   T70] dummy0: left allmulticast mode
[ 1872.693615][   T70] dummy0: left promiscuous mode
[ 1872.693900][   T70] br0: port 1(dummy0) entered disabled state