Cisco SG500X-48P-K9 48-Port Gig PoE + 4-Port 10-Gig Stackable Managed Switch

It also includes four 10 Gigabit Ethernet uplink ports for high-speed connectivity to servers, storage devices, or other switches. N9K-C93180YC-FX3 Cisco Nexus 9300 48p 1/10G/25G SFP and 6p 40G/100G QSFP28.

eBay