Currently ovs agent only explicitly sets agent timestamp to br-int and br-tun bridges.
Other physical bridges that are configured receive cookie=0x0 for their flows because the agent doesn't set timestamp for these bridges.
Currently that doesn't lead to any malfunction, however it's better to provide a consistentsy over operations with bridges's flows.
Currently ovs agent only explicitly sets agent timestamp to br-int and br-tun bridges.
Other physical bridges that are configured receive cookie=0x0 for their flows because the agent doesn't set timestamp for these bridges.
Currently that doesn't lead to any malfunction, however it's better to provide a consistentsy over operations with bridges's flows.