Our primary use case is for ethernet switches. We mainly use switches and routers as edge distribution switches. Some of the plants have been with the big pharmaceutical company Aragon. We have also been with a North American company, and others. Most of their switches were Cisco in pharmaceutical company where I worked for 10 years.
Some of the switches in the plants were used as a core. Many of them, especially in Bulgaria and in Europe, I installed myself. Others in America are responsible during the shift time for the configuration changes and so on. They are used in any level, as a Layer 3, Layer 2, whatever. All kinds of switches are used in the different places in our LAN.