Looking at the network devices someone could ask one interesting questions: how to build a network device; how would you describe an internal device architecture?
Of course every company has its own patents, secrets, methods etc. how they built, manage and operate network appliances. Below are some information I found when working with them or reading about them.
- Arista network operating system switch architecture
- Dell DNOS or FTOS architecture
- F5 Network has its Linux based TMOS architecture (link1/link2)