The Juniper QFX5120 line offers 1/10/25/40/100GbE Ethernet switches designed for modern data center, interconnect, and campus core/distribution deployments. With a rich feature set for EVPN-VXLAN-based architectures and high-speed connectivity, QFX5120 switches deliver scalable performance with low latency and advanced security, including AES-256 MACsec encryption on select models.
Manage QFX5120 deployments using Juniper Apstra for full network lifecycle automation and assurance, or Juniper Mist Cloud for enhanced campus fabric visibility and control.
Key Features
Use Case: Data Center Fabric Leaf/Spine, Campus Core/Distribution, MACsec-enabled applications
Port Density:
- QFX5120-48T: 48 x 1/10GbE RJ-45 and 6 x 40/100GbE QSFP+/QSFP28
- QFX5120-48Y: 48 x 1/10/25GbE SFP/SFP+ and 8 x 40/100GbE QSFP+/QSFP28
- QFX5120-48YM: 48 x 1/10/25GbE SFP/SFP+ and 8 x 40/100GbE QSFP+/QSFP28
- QFX5120-32C: 32 x 40/100GbE QSFP+/QSFP28 and 2 x 10GbE SFP+
Throughput: Up to 2.16/4/6.4 Tbps (bidirectional)
MACsec: AES-256 encryption on all ports (QFX5120-48YM)
Features & Benefits
High Throughput
Delivers up to 6.4 Tbps bidirectional Layer 2/Layer 3 performance with ultra-low latency as low as 550 nanoseconds.
Junos OS Capabilities
Supports advanced features like EVPN, BGP Add Path, MPLS, L3 VPNs, and IPv6 Provider Edge (6PE) for flexible and scalable networking.
Deployment Options
Offers EVPN-VXLAN Layer 2 and Layer 3 gateway support, ideal for edge-routed and centrally routed data center overlay designs.
Fabric Management
Enables day 0 to day 2 lifecycle management with Juniper Apstra’s intent-based operations and closed-loop assurance.
Network Automation
Compatible with automation tools like Python, Puppet, Ansible, and supports Zero Touch Provisioning (ZTP) for simplified deployment.




