[ 1893.540041][T21921] br0: port 1(dummy0) entered blocking state
[ 1893.540244][T21921] br0: port 1(dummy0) entered disabled state
[ 1893.540421][T21921] dummy0: entered allmulticast mode
[ 1893.541564][T21921] dummy0: entered promiscuous mode
[ 1893.561438][T21922] br0: port 1(dummy0) entered blocking state
[ 1893.561766][T21922] br0: port 1(dummy0) entered forwarding state
[ 1895.423898][   T12] dummy0: left allmulticast mode
[ 1895.424063][   T12] dummy0: left promiscuous mode
[ 1895.424293][   T12] br0: port 1(dummy0) entered disabled state