HPE Aruba JL323A 2930M 40G 8‑Slot PoE+ Layer 3 Stackable Switch – 36×1G PoE+ +4×

Low latency: ~3.1 µs @ 1 Gb; ~6.5 µs @ 2.5 Gb; ~4.2 µs @ 5 Gb; ~3.4 µs @ 10 Gb.

eBay