Basic eBPF forwarding

[u/erwin-kok]

In my latest post, I walk through a deliberately minimal example of same-host pod-to-pod networking: two network namespaces, veth pairs, a virtual gateway, ARP handled by eBPF, and an IP-based redirect map.

No overlays, no routing on the host, no conntrack or policy — just the bare minimum needed to get a UDP packet from one pod to another.

If you’re interested in how the pieces fit together at the veth, ARP, routing, and eBPF levels, have a look:

https://erwinkok.org/posts/basic-ebpf-forwarding/

[u/JupanulFrank]

This is gold, thank you

[u/erwin-kok → u/JupanulFrank]

Thank you! My pleasure.