Not sure if I understand the question, but for infra, I could say: version it. Switches have config files or firmware dumps, the same goes for bios and raid bi

Not sure if I understand the question, but for infra, I could say: version it. Switches have config files or firmware dumps, the same goes for bios and raid bios, for documentation in the infra and connections, etc... Infra will evolve, and so will do the "version". While in "test" stage, it's "next version" infra, while in production, the architecture, firmware, connections and configuration, run a tested "version". Is not easy to integrate/automate infra from different vendors, but it can be done. Been there, done that.