Path tracking method and device, equipment and computer readable storage medium

Abstract

The invention provides a path tracking method, which comprises the following steps: in the process that a client performs path tracking by sending a tracking message with a TTL value of N, if a first network device receives the tracking message, caching an incoming interface address for receiving the tracking message on the first network device; and when the first network equipment determines that the equipment is not the destination address for path tracking and the TTL value is reduced to 0, generating a TTL time-out message, enabling the TTL time-out message to carry the cached information of the incoming interface address, and sending the TTL time-out message to the client. Therefore, before the TTL time-out message is sent to the client, the source address carried by the TTL time-out message is the incoming interface address of the tracking message received by the TTL time-out message, so that troubleshooting of a networking information path is facilitated, and maintenance and solving of a network layout problem are facilitated.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a path tracing method, device, equipment and computer-readable storage medium. Background technique [0002] Tracert generally refers to trace routing. The Tracert command uses the IP Time To Live (TTL) field and the Internet Control Message Protocol (Internet Control Message Protocol, ICMP) error message to determine the route from a host to other hosts on the network. . [0003] First, Tracert sends an IP packet with a TTL of 1 to the destination. When the first router on the path receives this packet, it will decrement the TTL by 1. At this time, the TTL becomes 0, so the router will This data packet is lost, and an ICMP time exceeded message is sent back (that is, a TTL time exceeded message). After receiving this message, Tracert knows that the router exists on this path, and then Tracert sends another data packet with a TTL of 2 , used to discover the...

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Problems solved by technology

[0004] During the above route tracking process, when a device receives the data packet sent by Tracert and reduces the TTL to 0, it needs to reply ICMP time exceeded message, but the device When replying to the ICMP time exceeded message, due to the re-searching of the route, the source IP address of the reply ICMP time exceeded message may not be the IP address of the interface where the upstream traffic enters the device, but the IP address of the outgoing interface of the downstream traffic, that is, the device receives the Tracert sent The interface IP of the data packet is different from the source IP of the reply ICMP time exceeded message, which is not conducive to the investigation of the network information path

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