Towards cross-layer telemetry

Abstract

This paper introduces Cross-Layer Telemetry (Clt), a way to combine in-band telemetry (based on In-Situ Oam) and Application Performance Management (APM, based on distributed tracing) into a single monitoring tool providing a full network stack observability. Using Clt, APM traces are correlated with network telemetry information, providing a better view and faster root cause analysis in case of issue. In this paper, we describe the Clt implementation and discuss a use case demonstrating its efficiency. All Clt source code is available as open source.