A link control protocol is defined for the mult-link management to control link identification, link blocking and link failure conditions. 链路控制协议被规定用于多链路管理来控制链路标识，链路阻塞和链路故障状态。
If this is the case the circuit manager may wish to filter out datagrams for the appropriate network layer if only one of the applications is affected. 在这种情况时，链路管理器可能为特定的网络层过滤数据包，而只使一个程序受影响。
