The Juniper QFX5120-48Y-AFI2 is a high-performance, low-latency data center switch from the Juniper QFX5120 Series, designed for modern cloud, enterprise, and spine-leaf architectures. It is optimized for high-density 25G server access with scalable 100G uplink connectivity.
This model features 48x SFP28 ports supporting 1G, 10G, and 25G Ethernet, along with 8x QSFP28 uplink ports supporting 40G and 100G connectivity, enabling flexible deployment and high-speed aggregation.
The AFI2 variant uses back-to-front airflow (Airflow In), making it suitable for specific data center cooling designs where air intake is from the rear and exhaust is through the front.
Built in a compact 1U fixed form factor, the switch delivers up to 4 Tbps bidirectional throughput with ultra-low latency (~800 ns), ensuring wire-speed Layer 2 and Layer 3 performance for demanding workloads.
It runs on Juniper Junos OS, offering advanced networking features such as EVPN, VXLAN, MPLS, BGP, and automation capabilities. The system includes a 2.2 GHz quad-core CPU, 16GB RAM, and 50GB SSD storage, providing strong control-plane performance.
The switch also supports Virtual Chassis (up to 2 devices) for simplified management and scalability, along with redundant hot-swappable power supplies and fan modules for high availability.
It is widely used in Top-of-Rack (ToR), leaf layer, and aggregation deployments, especially in environments requiring high bandwidth, automation, and reliability.
