The QFX5210-64C-AFO2 is a high-density 100GbE data center switch from Juniper Networks, designed for spine-and-leaf architectures, high-performance computing (HPC), and cloud-grade infrastructure. It delivers up to 12.8 Tbps of throughput with 64 QSFP28 ports, each supporting 100GbE or breakout into 4 x 25GbE or 4 x 10GbE. The AFO2 variant features front-to-back airflow, making it ideal for hot-aisle containment in modern data center deployments. Powered by Junos OS, the QFX5210-64C supports advanced Layer 2 and Layer 3 features, EVPN-VXLAN, MPLS, and automation via open APIs.
Product Details
| Attribute | Description |
| Product Name | QFX5210-64C-AFO2 |
| Brand | Juniper Networks |
| Port Configuration | 64 x 100GbE QSFP28 (40G/100G capable) |
| Breakout Support | 100G to 4 x 25G or 4 x 10G (per port) |
| Max Switching Capacity | 12.8 Tbps |
| Forwarding Rate | 9.52 Bpps |
| Form Factor | 2U rack-mountable |
| Airflow Direction | Front-to-back (AFO2) |
| Power Supplies | Dual hot-swappable AC (included) |
| Cooling | Redundant hot-swappable fan trays |
| Operating System | Junos OS |
| Ideal Use Cases | Data center spine, high-density leaf, DCI, cloud core, service edge |
Key Features
64 QSFP28 ports, each supporting 100G, 40G, or breakout into 4 x 25G / 4 x 10G
Up to 256 x 25G or 256 x 10G ports via breakout cables
Front-to-back airflow (AFO2) for hot-aisle optimized cooling
Advanced Layer 2/Layer 3, EVPN-VXLAN, MPLS, and segment routing
MACsec, telemetry, and automation-ready (NETCONF, REST, Python, Ansible)
Supports data center interconnect, telco edge, and cloud-scale routing
Field-replaceable redundant power and cooling components for high availability
Technical Specifications
| Specification | Value |
| Ports | 64 x QSFP28 (100G/40G), breakout supported |
| Max Switching Capacity | 12.8 Tbps |
| Forwarding Rate | 9.52 billion pps |
| Breakout Options | 4 x 25G or 4 x 10G per QSFP28 port |
| Airflow | Front-to-back (AFO2) |
| Power Supply | Dual hot-swappable AC |
| Fan Modules | Hot-swappable, redundant |
| Operating System | Junos OS |
| Form Factor | 2U rack-mountable |
| MACsec Support | On selected ports |
| Operating Temperature | 0°C to 40°C |
| Automation Support | NETCONF, REST API, Python, Ansible |
Similar Models Comparison
| Model | Port Configuration | Airflow | Switching Capacity | Use Case |
| QFX5210-64C-AFO2 | 64 x 100G QSFP28 | Front-to-back | 12.8 Tbps | Spine, DCI, HPC, cloud networks |
| QFX5210-64C-AFI2 | 64 x 100G QSFP28 | Back-to-front | 12.8 Tbps | Cold-aisle airflow environments |
| QFX5120-48Y-AFO2 | 48 x 25G + 6 x 100G | Front-to-back | 3.6 Tbps | Leaf layer, enterprise core |
| QFX10002-36Q | 36 x 40G QSFP+ | Variable | 2.56 Tbps | Aggregation, core switching |
