July 3, 2018 - The QFX5120 series switches have software features that support modern IP fabric architectures with EVPN-VXLAN and work with Juniper Apstra and the Juniper Mist Cloud to automate and simplify operations in your data center network.
August 3, 2023 - Juniper Networks dramatically simplifies network operations and driving super experiences for end users. Our solutions deliver industry-leading insight, automation, security and AI to drive real business results. We believe that powering connections will bring us closer together while empowering ...
The 5100 has more mature software that lets it do more. The 5110 and 5200 seem to be catching up slowly with every release. The specs table for the 5200 show it having smaller tables for things, so it's probably using cheaper chips. More on reddit.com
I went thru the same decision process, built the MC-LAGs and the whole deal. But decided I would get no new functionality which would help drive my business requirements; only complexity and grief. More on reddit.com
QFX5120 Switches offer 1 U, 10/25/100GbE fixed configuration ideal for data centers where cloud services are being added. These services require higher network bandwidth per rack, making 10GbE, 25GbE and 100GbE the dominant port speeds in most data centers.