[ 2134.415640][ T8340] br0: port 1(dummy0) entered blocking state
[ 2134.415885][ T8340] br0: port 1(dummy0) entered disabled state
[ 2134.416112][ T8340] dummy0: entered allmulticast mode
[ 2134.417138][ T8340] dummy0: entered promiscuous mode
[ 2134.456848][ T8341] br0: port 1(dummy0) entered blocking state
[ 2134.457126][ T8341] br0: port 1(dummy0) entered forwarding state
[ 2137.528535][   T12] dummy0: left allmulticast mode
[ 2137.528755][   T12] dummy0: left promiscuous mode
[ 2137.529007][   T12] br0: port 1(dummy0) entered disabled state