Path detection method, device and system
A path detection and decapsulation technology, which is applied in the communication field, can solve the problems that the controller cannot sort the paths and forwarding path errors, etc., and achieve the effect of avoiding inaccurate forwarding paths
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Embodiment 1
[0069] In view of the problems existing in related technologies, an optional method is that the controller can check the forwarding table or network topology according to the packet label to make corrections, but there is still a difference between the software forwarding table and the actual forwarding of the device. More importantly, the correction Algorithms will seriously affect the flow processing performance of the controller, and it is impossible to efficiently perform tens of thousands or even hundreds of thousands of follow-up analysis per second in the data center. Furthermore, if there is a device that does not support the IFIT function between two network devices, the controller cannot restore the real forwarding path according to the routing and topology, and can only rely on the network management to obtain it, which cannot truly achieve the purpose of automatic network detection.
[0070] This embodiment provides a path detection method, adding the first identifi...
Embodiment 2
[0097] according to image 3 In this embodiment, a more specific introduction is given to path detection. The introduction of each network device has been introduced in the previous embodiment, and will not be repeated here.
[0098] In this embodiment, only the head node R1 and the tail node R2 send statistical information.
[0099] The head node R1 receives the service message of Leaf2 or leaf3 on the access side, and judges that the destination IP address of the service message is the S23 address. At this time, it determines that the service message meets the preset conditions, triggers IFIT detection, and adds an IFIT field to the service message, where The first identification HeadType=0x5, R1 as the first node ID MAP only contains the ID of R1, the M flag is set, and the statistics of time stamp and packet statistics are counted at the same time. The service message with the IFIT header is forwarded to the next hop node;
[0100] The intermediate node R2 receives the ...
Embodiment 3
[0112] This embodiment provides a path detection device, Figure 5 provides a path detection device such as Figure 5 As shown, the device includes: a first receiving module 501, a first packaging module 502, and a first sending module 503;
[0113] After the first receiving module 501 receives the service message, if the service message satisfies a preset condition, the first encapsulation module 502 adds an IFIT header to the message; wherein, the first IFIT header in the IFIT header The extension field is set to a first identifier, and the first identifier is used to indicate that the extension detection function is enabled;
[0114] The first encapsulation module 502 is further configured to add the hop count corresponding to the ingress node in the IFIT header according to the first identifier;
[0115] The first sending module 503 is configured to send the service message encapsulated with the IFIT header to the next-hop node.
[0116] Optionally, the first encapsulat...
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