Fault detection method and system

Abstract

Embodiments of the present invention provide a fault detection method and system. The method includes: sending port scan packets based on at least two port pairs to a destination end, where each port pair includes a source port number and a destination port number and corresponds to a path between a source end and the destination end; receiving a response packet sent by the destination end, where the response packet carries an unreceived port pair that is determined by the destination end based on the port scan packets; and based on the port pair carried by the response packet, determining a faulty path. Based on technical solutions provided by the embodiments of the present invention, port scan packets are sent based on multiple port pairs, so that the port scan packets can reach the destination end through multiple paths, so as to detect multiple paths between the source end and the destination end. Compared with the prior art where only one path can be detected, the present invention can implement more efficient fault detection and accurately find existence of a fault in a network.

Description

technical field [0001] The present invention relates to the field of network communication, and more particularly, to a method and system for detecting faults in the field of network communication. Background technique [0002] It is an indisputable fact that the all-IP (Internet Protocol, Internet Protocol) network is the trend of future service development. More and more operators carry traditional telecommunication services and emerging services on the IP network to obtain new services, Features and benefits such as high bandwidth utilization and low cost. Equal-Cost MultiPath (ECMP), as a prominent feature of IP networks, greatly improves the resource utilization of IP networks and balances the load of IP networks, but it also brings great challenges to the fault detection and location of IP networks. Great difficulty came. [0003] ECMP can share the load of IP packets sent from the source end to the destination end on multiple equal-cost paths to maximize the use of ...

AI Technical Summary

Problems solved by technology

However, although the Traceroute packets sent from the source end to the destination end have the same source IP address, destination IP address, and protocol number (1), but because there is no source port number and destination port number, the Traceroute packets can only pass through One path can only detect and locate the fault of one path

[0009] It can be seen that the above-mentioned related technologies do not distinguish port numbers in the process of detecting faults, and the sent packets can only pass through the same path, so only one path fault can be detected, and the source end and destination end cannot be detected. failure of other paths between

In this way, in the network based on port selection (such as ECMP network), the failure between the source end and the destination end cannot be effectively detected.

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