[ 1904.610083][T11308] br0: port 1(dummy0) entered blocking state
[ 1904.610333][T11308] br0: port 1(dummy0) entered disabled state
[ 1904.610559][T11308] dummy0: entered allmulticast mode
[ 1904.611670][T11308] dummy0: entered promiscuous mode
[ 1904.648364][T11309] br0: port 1(dummy0) entered blocking state
[ 1904.648630][T11309] br0: port 1(dummy0) entered forwarding state
[ 1906.534244][   T12] dummy0: left allmulticast mode
[ 1906.534547][   T12] dummy0: left promiscuous mode
[ 1906.534774][   T12] br0: port 1(dummy0) entered disabled state