| 摘要 |
PCT No. PCT/EP95/01962 Sec. 371 Date Jan. 21, 1997 Sec. 102(e) Date Jan. 21, 1997 PCT Filed May 23, 1995 PCT Pub. No. WO96/05676 PCT Pub. Date Feb. 22, 1996A method is described by which a data communication network can be tested. The network consists of a number of nodes which are connected to each other. At least one of the nodes is designated to the user as be inaccessible from a first node (A). Data are available within the network which, starting from the first node indicate the path to the node which is designated as being inaccessible. An interrogation is carried out to determine which is the nearest node, starting from the first node, on the path to the node which is designated as inaccessible. This nearest node is then directed to determine whether the interrogated nearest node is accessible. If this is the case, another interrogation is performed to determine which is the nearest node, now starting from the already reached node, on the path to the node which is designated as inaccessible. Another test is performed to ascertain if the new nearest node is accessible. This interrogation and testing are repeated until an interrrogation nearest node is not accessible. This inaccessible node is then recognized as defective, and this is communicated to the user. In this manner, a test system is presented which can automatically and quickly detect a defective node in the date-communication network and is indicate this to the user. |
