[ 2015.591396][ T2651] br0: port 1(dummy0) entered blocking state
[ 2015.591598][ T2651] br0: port 1(dummy0) entered disabled state
[ 2015.591772][ T2651] dummy0: entered allmulticast mode
[ 2015.593143][ T2651] dummy0: entered promiscuous mode
[ 2015.616894][ T2652] br0: port 1(dummy0) entered blocking state
[ 2015.617148][ T2652] br0: port 1(dummy0) entered forwarding state
[ 2017.644163][   T12] dummy0: left allmulticast mode
[ 2017.644482][   T12] dummy0: left promiscuous mode
[ 2017.644746][   T12] br0: port 1(dummy0) entered disabled state