[ 1978.251061][ T3430] br0: port 1(dummy0) entered blocking state
[ 1978.251286][ T3430] br0: port 1(dummy0) entered disabled state
[ 1978.251999][ T3430] dummy0: entered allmulticast mode
[ 1978.252947][ T3430] dummy0: entered promiscuous mode
[ 1978.284372][ T3431] br0: port 1(dummy0) entered blocking state
[ 1978.284595][ T3431] br0: port 1(dummy0) entered forwarding state
[ 1980.275021][   T70] dummy0: left allmulticast mode
[ 1980.275203][   T70] dummy0: left promiscuous mode
[ 1980.275413][   T70] br0: port 1(dummy0) entered disabled state