Juniper QFX5120‑48Y‑AFI2 48‑Port 25/10/1 GbE Data Center & Campus Ethernet Switch with 100 GbE Uplinks

Description

The Juniper QFX5120‑48Y‑AFI2 is a high‑performance fixed Ethernet switch in the QFX5120 Series, engineered for data center top‑of‑rack/leaf, campus distribution, and enterprise aggregation deployments requiring dense 25 GbE downlinks and high‑speed uplinks. This model provides 48 programmable SFP28 ports that support 1/10/25 GbE speeds for server or network access, plus 8 QSFP28 uplink ports that can operate as 40 GbE or 100 GbE interfaces (or be broken out into multiple lower‑speed links with breakout cables), giving flexibility to scale network fabrics.

Built on Juniper’s Junos OS, the QFX5120 family delivers robust Layer 2 and Layer 3 services, including EVPN‑VXLAN overlay/underlay, multicast routing, automation, and rich telemetry for deep visibility. With switching performance up to 4 Tbps bidirectional and ultra‑low latency (sub‑microsecond), it’s well suited for high‑density server access, campus distribution layers, and collapsed spine fabrics.

The AFI2 variant specifically includes front‑to‑back airflow with AC power inlet for optimized thermal operation in hot‑aisle/cold‑aisle rack configurations, making it ideal for modern data center environments that follow hot‑aisle containment designs. Redundant fans and power supply options enhance resiliency and uptime.

Key Features:
• 48× 1/10/25 GbE SFP28 ports for high‑density data center or campus leaf access.
• 8× QSFP28 uplink ports configurable for 40 GbE or 100 GbE connectivity (also breakout capable).
• Up to 4 Tbps bidirectional switching capacity with ultra‑low latency.
• Advanced Junos OS with EVPN‑VXLAN, BGP/OSPF routing, automation, and analytics support.
• Front‑to‑back airflow (AFI2) with AC power support for efficient cooling in data center racks.
• Scalable fabric support including multichassis link aggregation (MC‑LAG) and overlay architectures.