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arXiv · 2212.12627

High Performance Delay Monitoring for SRv6 Based SD-WANs

Carmine Scarpitta·Giulio Sidoretti·Andrea Mayer·Stefano Salsano·Ahmed Abdelsalam·Clarence Filsfils
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Abstract

Software-Defined Wide Area Networks (SD-WANs) are used to provide services to enterprises with geographically dispersed locations in a flexible and efficient way. We focus on SD-WAN services based on the Segment Routing over IPv6 (SRv6) technology. Performance Monitoring solutions are needed in SD-WANs to detect performance degradation and outages, and optimize network operations. In this paper, we describe a high performance solution for end-to-end delay monitoring for SRv6 based SD-WAN services. The proposed solution leverages the Simple Two-way Active Measurement Protocol (STAMP) to monitor the delay of an SRv6 path between two nodes called STAMP Session-Sender and Session-Reflector. We describe three implementations of the STAMP Session-Sender and Session-Reflector for a Linux software router and compare their performance. In particular, two implementations are based on user space processing and one is based on eBPF. The results show that the eBPF-based implementation outperforms the user space implementations and has a negligible impact on the forwarding capacity of the Linux software router.

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Carmine Scarpitta, Giulio Sidoretti, Andrea Mayer, Stefano Salsano, Ahmed Abdelsalam, Clarence Filsfils. 2022-12-31. High Performance Delay Monitoring for SRv6 Based SD-WANs. https://arxiv.org/abs/2212.12627

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