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Efficient Slice-Parallel Distributed Probing in SRv6 Networks
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DOI：10.1109/ton.2026.3695506.png)
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Abstract
En 中文
Segment Routing over IPv6 (SRv6) is widely deployed, where operators construct numerous parallel SR-based network slices. An accurate diagnosis of latency bottlenecks in SRv6 tunnels is essential to maintain service-level objectives. However, building a distributed, at-scale probing system is nontrivial: SRv6 priority policies, SR-aware multipath forwarding, and slice isolation collectively invalidate assumptions made by existing diagnostic methods. In this paper, we present <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\textsf {SRmesh}$ </tex-math></inline-formula>, a distributed system for diagnosing latency bottleneck links in SRv6 networks. First, we adopt distributed SR-based probing agents to control routing paths and ensure that probe packets emulate per-slice production traffic. Second, we employ a latency-based multipath inference that runs in parallel across slices to resolve SR-induced routing ambiguities. Third, we introduce a slice-parallel progressive diagnosis that incrementally reuses probe results to reduce redundant measurements, optimizing diagnostic overhead for large-scale SRv6 overlay networks. We implement a prototype of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\textsf {SRmesh}$ </tex-math></inline-formula> and conduct extensive evaluations on 247 real network topologies. The results indicate that <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\textsf {SRmesh}$ </tex-math></inline-formula> achieves high diagnostic accuracy with a 93.4% reduction in probe overhead, demonstrating its practicality and scalability in large-scale SRv6 environments.
Keywords:
Segment routing
IPv6
latency bottleneck
network slicing
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