关键词: 段路由, 带内网络遥测, 软件定义网络

Abstract: In recent years,network technology has evolved rapidly,and the infrastructure and network services provided have become increasingly complex.Traditional network management and monitoring tools are facing serious challenges.Domestic and international researchers have proposed segment routing(SR) and in-band network telemetry(INT) technologies to perform more real-time and fine-grained network measurements.However,in-band network telemetry technologies still have many challenges in practical use,such as flexible deployment,dynamic deployment,and efficient deployment in the rapidly growing network environment.First,the traditional INT technology lacks a suitable carrier,and the packet overhead increases linearly with the telemetry path length,which leads to the performance bottleneck problem of telemetry monitoring.For the problem of high bit overhead and difficulties in efficient deployment of traditional in-band network telemetry systems,this paper proposes an SRv6_Based in-band network telemetry approach(SRv6_Based INT).In this work,the overhead of INT and SR is reduced and the two are seamlessly combined to achieve a lightweight and adaptive telemetry approach.In this work,the metadata of INT is designed so that its length is equal to the Segment field in SRv6,and then the corresponding SID is modified to the corresponding INT metadata in each hop according to the flow table issued by the monitoring server.This method fully combines the advantages of both techniques and keeps the overhead within a reasonable range,which is better than the traditional in-band network telemetry methods.

Key words: Segment routing, In-band network telemetry, Software-defined network