QFX5110 48S AFO2 Front-to-Back 1U High-Density 10G Switch
Product Overview
The QFX5110-48S-AFO2 is a 1U, high-performance, low-latency Layer 3 switch from Juniper Networks, optimized for 10GbE/40GbE/100GbE deployments in data centers and enterprise aggregation environments. It features 48 small form-factor SFP+ ports for 10GbE and 6 high-speed uplink ports—4 x 100GbE (QSFP28) and 2 x 40GbE (QSFP+). The AFO2 variant supports front-to-back airflow, aligning with hot-aisle/cold-aisle cooling strategies. Built on Junos OS, the QFX5110-48S offers EVPN-VXLAN, automation, advanced telemetry, and MACsec security, making it an ideal solution for modern cloud-ready networks.
Product Details
| Attribute | Description |
| Product Name | QFX5110-48S-AFO2 |
| Brand | Juniper Networks |
| Access Ports | 48 x 1G/10G SFP/SFP+ |
| Uplink Ports | 4 x 100G QSFP28, 2 x 40G QSFP+ |
| Max Switching Capacity | 2.56 Tbps |
| Forwarding Rate | 1.44 Bpps |
| Form Factor | 1U rack-mountable |
| Airflow Direction | Front-to-back (AFO2) |
| Power Supply | Dual hot-swappable AC |
| Fan Modules | Redundant, hot-swappable |
| Operating System | Junos OS |
| Use Cases | Data center top-of-rack (ToR), spine-leaf networks, enterprise core |
Key Features
48 x 1G/10G SFP+ ports for high-density server and access layer connectivity
4 x 100G QSFP28 and 2 x 40G QSFP+ uplink ports for scalable aggregation or spine uplinks
Front-to-back airflow (AFO2), optimized for hot-aisle containment
Comprehensive Layer 2 and Layer 3 support, including EVPN-VXLAN, BGP, OSPF, ISIS
MACsec encryption on select ports for secure communication
Automation via NETCONF, REST APIs, Python, and Ansible
Open telemetry support and extensive programmability
Ideal for 10G to 100G migration, cloud interconnect, and enterprise core switching
Technical Specifications
| Specification | Value |
| Downlink Ports | 48 x 10G SFP+ |
| Uplink Ports | 4 x 100G QSFP28, 2 x 40G QSFP+ |
| Switching Capacity | 2.56 Tbps |
| Forwarding Rate | 1.44 billion pps |
| Breakout Support | Yes (100G to 4 x 25G or 4 x 10G) |
| Airflow | Front-to-back (AFO2) |
| Power Supply | Dual hot-swappable AC |
| Fan Trays | Redundant, hot-swappable |
| MACsec | Supported on select ports |
| OS | Junos OS |
| Form Factor | 1U |
| Automation Support | NETCONF, REST, Python, Ansible |
Similar Models Comparison
| Model | Downlink Ports | Uplink Ports | Airflow | Max Capacity | Use Case |
| QFX5110-48S-AFO2 | 48 x 10G SFP+ | 4 x 100G, 2 x 40G | Front-to-back | 2.56 Tbps | ToR, enterprise aggregation |
| QFX5110-48S-AFI2 | 48 x 10G SFP+ | 4 x 100G, 2 x 40G | Back-to-front | 2.56 Tbps | Cold-aisle data centers |
| QFX5120-48Y-AFO2 | 48 x 25G SFP28 | 6 x 100G QSFP28 | Front-to-back | 3.6 Tbps | Leaf, core, higher density 25G |
| QFX5210-64C-AFO2 | 64 x 100G QSFP28 | — | Front-to-back | 12.8 Tbps | Spine, high-performance DCI |
