# How Network Observability with eBPF Works

Page: https://stenobird.com/podcast/networking-tech-with-fexingo-internet-infrastructure-routing-and-network-engineering-7871928/how-network-observability-with-ebpf-works-2
Text version: https://stenobird.com/podcast/networking-tech-with-fexingo-internet-infrastructure-routing-and-network-engineering-7871928/how-network-observability-with-ebpf-works-2.md
Podcast: [Networking Tech with Fexingo: Internet Infrastructure, Routing, and Network Engineering](https://stenobird.com/podcast/networking-tech-with-fexingo-internet-infrastructure-routing-and-network-engineering-7871928)
Published: 2026-06-22T10:03:08+00:00
Episode link: https://audio.fexingo.com/business/networking-tech/episode-0066.mp3
Audio file: https://audio.fexingo.com/business/networking-tech/episode-0066.mp3
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JSON: https://stenobird.com/v1/public/podcasts/networking-tech-with-fexingo-internet-infrastructure-routing-and-network-engineering-7871928/episodes/how-network-observability-with-ebpf-works-2
Duration seconds: 550

## Resource

This episode of Networking Tech with Fexingo dives into eBPF (extended Berkeley Packet Filter), a technology that lets network engineers run sandboxed programs in the Linux kernel without changing kernel code or loading modules. Lucas and Luna explain how eBPF enables deep observability into network traffic, security events, and performance metrics with minimal overhead — used by companies like Netflix, Cilium, and Facebook for real-time packet filtering, load balancing, and troubleshooting. They walk through a concrete example: how a team can trace every TCP retransmission across a Kubernetes cluster without restarting a single pod. The hosts also discuss the shift from legacy monitoring tools like iptables to eBPF-powered solutions, and why this matters for modern cloud-native networks. If you've ever wondered how engineers see inside their network without adding latency, this episode is for you. #eBPF #NetworkObservability #LinuxKernel #ExtendedBerkeleyPacketFilter #Cilium #CloudNative #KubernetesNetworking #PacketFiltering #TCPRetransmission #NetworkPerformance #Technology #Networking #FexingoBusiness #BusinessPodcast #Infrastructure #DevOps #SiteReliabilityEngineering #NetworkTracing Keep every episode free: buymeacoffee.com/fexingo

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## Transcript

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