The QFX5110-48S-AFI2 is a high-density, low-latency 10GbE Layer 3
switch from Juniper Networks, designed for enterprise aggregation,
top-of-rack (ToR), and leaf deployments in data center networks. It
provides 48 x 10GbE SFP+ ports, along with 4 x 100GbE QSFP28 and 2
x 40GbE QSFP+ uplinks, supporting flexible breakout and
high-throughput connectivity. The AFI2 model features back-to-front
airflow, optimized for cold-aisle containment. The QFX5110 series
runs on Junos OS, delivering rich features including EVPN-VXLAN,
MACsec, automation, and telemetry.
Product Details
| Attribute | Description |
|---|
| Product Name | QFX5110-48S-AFI2 |
| Brand | Juniper Networks |
| Access Ports | 48 x 1G/10G 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 | Back-to-front (AFI2) |
| Power Supply | Dual hot-swappable AC |
| Cooling | Redundant hot-swappable fan modules |
| Operating System | Junos OS |
| Ideal Use Cases | Data center ToR, enterprise aggregation, 10G migration, cloud
networks |
Key Features
48 x 10G SFP+ ports for high-density access/server connectivity
4 x 100G and 2 x 40G uplinks supporting spine or aggregation use
Back-to-front airflow (AFI2) suitable for cold-aisle cooling
systems
Supports EVPN-VXLAN, BGP, OSPF, MPLS, and segment routing
MACsec encryption on selected ports for secure transmission
Automation-ready via REST APIs, NETCONF, Python, and Ansible
Breakout options from QSFP+ and QSFP28 ports to 4 x 10G or 4 x 25G
Ideal for transitioning from 10G to 100G network architectures
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 | Back-to-front (AFI2) |
| Power Supply | Dual hot-swappable AC |
| Fan Modules | Redundant, hot-swappable |
| MACsec | Supported on select ports |
| Operating System | 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-AFI2 | 48 x 10G SFP+ | 4 x 100G, 2 x 40G | Back-to-front | 2.56 Tbps | Cold-aisle data centers |
| QFX5110-48S-AFO2 | 48 x 10G SFP+ | 4 x 100G, 2 x 40G | Front-to-back | 2.56 Tbps | Hot-aisle data centers |
| QFX5120-48Y-AFI2 | 48 x 25G SFP28 | 6 x 100G QSFP28 | Back-to-front | 3.6 Tbps | Leaf/core in 25G environments |
| QFX5210-64C-AFI2 | 64 x 100G QSFP28 | — | Back-to-front | 12.8 Tbps | Spine, high-performance compute |
