DMX512 runs at 250 kbit/s, so yeah, "not a lot". I've usually seen standard rackmount gigabit switches in installations, when I was involved in touring audio it

DMX512 runs at 250 kbit/s, so yeah, "not a lot". I've usually seen standard rackmount gigabit switches in installations, when I was involved in touring audio it was usually fanless consumer switches (think 8-port netgears), but these weren't for ethernet snakes. In terms of data, audio multicores over ethernet and video content distribution/playout massively dwarfs the bandwidth that lighting uses. But when it goes down, everyone notices.