I have 10 miner and i need a switcher now.
I know that the switcher TP-Link is good but don't know for 10-15 antminer s9 i must buy switcher gigabyte or megabyte is enough?
Any simple 100mbps switch will do. TP-Link is one of the cheapest brands on Earth, and its not exactly "high quality", but it should get the job done. I wouldn't bother with neither gigabit nor "smart" switches, but gigabit wouldn't hurt, or maybe those with just a couple of gigabit ports for cascading.