[ 2027.985993][T21685] br0: port 1(dummy0) entered blocking state
[ 2027.986299][T21685] br0: port 1(dummy0) entered disabled state
[ 2027.986565][T21685] dummy0: entered allmulticast mode
[ 2027.987548][T21685] dummy0: entered promiscuous mode
[ 2028.013466][T21686] br0: port 1(dummy0) entered blocking state
[ 2028.013893][T21686] br0: port 1(dummy0) entered forwarding state
[ 2030.374614][   T70] dummy0: left allmulticast mode
[ 2030.375511][   T70] dummy0: left promiscuous mode
[ 2030.375835][   T70] br0: port 1(dummy0) entered disabled state