High Performance Delay Monitoring for SRv6 Based SD-WANs
Carmine Scarpitta, Giulio Sidoretti, Andrea Mayer, Stefano Salsano,, Ahmed Abdelsalam, Clarence Filsfils

TL;DR
This paper presents a high-performance end-to-end delay monitoring solution for SRv6-based SD-WANs using the STAMP protocol, demonstrating that eBPF implementation outperforms user space methods with minimal impact on router capacity.
Contribution
It introduces an efficient delay monitoring method for SRv6 SD-WANs utilizing STAMP and compares different implementation approaches, highlighting eBPF's superior performance.
Findings
eBPF-based implementation outperforms user space methods
Minimal impact on Linux router forwarding capacity
Effective end-to-end delay monitoring for SRv6 SD-WANs
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…
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Taxonomy
TopicsSoftware-Defined Networks and 5G · IPv6, Mobility, Handover, Networks, Security · Wireless Networks and Protocols
