Originally published at https://blog.pathvector.dev/protocol-lab-dnsrr-41/ — part of the free Protocol Lab series.
This post is part of Protocol Lab, a free, hands-on series for learning networking protocols by building and breaking them in a container lab. All the lab material — topologies, configs, and scripts — lives in the repo: github.com/pathvector-studio/protocol-lab.
The load-distribution labs so far worked in the network: anycast (Lab 31) let routing pick an instance, ECMP (Lab 32) hashed flows across links, and IPVS (Lab 33) had a director distribute connections. This lab spreads clients one layer earlier — at name resolution.
Reading guide: rfc-notes/dns-round-robin.md
Prerequisite: DNS Lab 05: Resolving a Name Through the Hierarchy
