A method supporting EIGRP protocol for detecting link single bi-directional state

The invention discloses a method supporting EIGRP protocol for detecting link single bi-directional state, Neighbor Discovery Protocol (NDP) is added to realize the detection of single and two-way state of the link, The NDP protocol notifies the link state to the EIGRP protocol, and the EIGRP protocol uses the received link state information to decide whether to take the sender of the HELLO message as its neighbor or not. A technical effect of that invention is that: a newly adde NDP protocol is adopted to realize the detection of a single bi-directional state of a link, and the EIGRP protocoldecides whether the HELLO message sender is taken as its neighbor by virtue of the information, thereby effectively avoiding sending a routing update message on a unidirectional link. The method provided by the invention is technically easy to realize, and can effectively save the memory of the routing exchange equipment, the resources such as the CPU and the bandwidth of the radio channel without changing the existing r