[ 2200.461082][T21687] br0: port 1(dummy0) entered blocking state
[ 2200.461269][T21687] br0: port 1(dummy0) entered disabled state
[ 2200.461435][T21687] dummy0: entered allmulticast mode
[ 2200.462463][T21687] dummy0: entered promiscuous mode
[ 2200.484347][T21688] br0: port 1(dummy0) entered blocking state
[ 2200.484708][T21688] br0: port 1(dummy0) entered forwarding state
[ 2202.369271][   T12] dummy0: left allmulticast mode
[ 2202.370143][   T12] dummy0: left promiscuous mode
[ 2202.370458][   T12] br0: port 1(dummy0) entered disabled state