Method and device for detecting network loop

Abstract

The invention discloses a method and a device for detecting a network loop. The local network device receives the identification information of the opposite network device and the identification information of its own upstream network device sent by the opposite network device. The identification information of the network device at the opposite end is compared with the identification information of the upstream network device of the network device at the opposite end, and the identification information of the network device at the upstream end of the network device at the local end and the identification information of the network device at the opposite end are compared respectively to determine whether the network device at the local end and the network device at the opposite end are There is an upstream and downstream relationship. When there is no upstream and downstream relationship, it is determined that a network loop occurs. Using this detection method, the relevant network equipment that constitutes a network loop can be determined, so that maintenance personnel can quickly locate the loop fault and improve the network loop. processing efficiency.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a method and device for detecting network loops. Background technique [0002] In a large-scale network environment, due to improper configuration of network equipment or hardware damage of network equipment, incorrect connection of network physical topology, or virus attack on the network, network loops become one of the most prone to failures. Network loops are network The device has received the message sent by itself, such as Figure 1A , 1B A schematic diagram of a network loop is shown. [0003] in, Figure 1A and Figure 1B Both include network device 1, network device 2, and network device 3, in Figure 1A Network device 1 is connected to network device 2 through port 1, and network device 1 is connected to network device 3 through port 2. [0004] Since network loops will cause network devices to continuously copy and forward broadcast, multicast and unknown pa...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method and device for detecting network loops, which solves the problem in the prior art that only the network loops can be detected, and the related equipment causing the network loops cannot be determined.

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