Juniper QFX5110-32Q-AFO: High-Density 40GbE/100GbE Aggregation for Spine and Layer 3 Fabrics The Juniper Networks QFX5110-32Q-AFO is a high-performance, QSFP -based 40GbE/100GbE switch engineered for data center aggregation, spine deployments, and high-bandwidth leaf roles. With 32 high-speed QSFP ports and advanced support for EVPN-VXLAN, MPLS, and automation, this switch provides exceptional throughput and low latency for modern multi-tenant fabrics and cloud architectures. The AFO airflow variant delivers back-to-front cooling, aligning with cold-aisle/hot-aisle designs where exhaust is directed toward the port side. This ensures compatibility with hardware rows using reverse airflow patterns or mixed-vendor environments requiring consistent thermal directionality. At a Glance: High-Bandwidth Leaf/Spine Switching The QFX5110-32Q-AFO provides four times the uplink scale of 10GbE access models by using QSFP and QSFP28 high-speed ports. Designed around the Broadcom Trident II ASIC, it delivers predictable performance, extensive automation, and flexible overlay support for data centers transitioning to high-density east-west traffic. 32 × QSFP ports supporting 40GbE QSFP28 support for 100GbE uplinks (select ports) Breakout support for 4×10GbE or 4×25GbE fan-out per port Reverse airflow (AFO) for data centers using back-to-front cooling EVPN-VXLAN L2/L3 gateway for multi-tenant fabric scaling Broadcom Trident II ASIC delivering low latency and wire-speed forwarding MPLS, L3VPN, IS-IS, OSPF, BGP for converged DC WAN/metro designs MACsec, telemetry, ZTP, Python automation via Junos OS High-Performance Switching Engine Powered by the Broadcom Trident II chipset, the QFX5110-32Q-AFO provides: Up to 2.56 Tbps switching capacity Up to 1.4 Bpps forwarding performance Sub-microsecond latency ideal for spine or high-performance leaf tiers Deep buffer architecture for bursty east-west and storage traffic These capabilities make it exceptionally well-suited for scalable cloud fabrics, financial workloads, virtualized compute, and large-scale distributed applications. Flexible Port Configuration for Modern Fabrics With up to 32 QSFP ports, this switch provides maximum density for 40GbE aggregation or leaf uplink scenarios. 40GbE native across all QSFP ports 100GbE supported on select QSFP28-capable ports Breakout options: 40GbE → 4×10GbE 100GbE → 4×25GbE Up to 128 × 10GbE or 128 × 25GbE via breakout This versatility enables a single switch model to function as a spine node, high-density leaf, or large east-west aggregation point. Automation, Telemetry & Junos Intelligence Zero Touch Provisioning (ZTP) for rapid, consistent deployment Junos Telemetry Interface (JTI) for real-time analytics Python scripting, REST APIs, NETCONF/YANG Ansible & Junos Space integration The QFX5110-32Q-AFO is built for DevOps-driven operations, fabric automation, and closed-loop monitoring architectures. EVPN-VXLAN, MPLS & Advanced Fabric Integration The QFX5110 family includes full Layer 2/Layer 3 overlay and underlay feature sets: EVPN-VXLAN L2/L3 gateway for multi-tenant data centers MPLS, L3VPN, RSVP-TE, Segment Routing* (model/RE dependent) BGP, IS-IS, OSPF, ECMP for scalable IP underlays Robust QoS and deep buffers This makes the switch suitable for spine roles in modern cloud fabrics, or for metro-edge deployments that require MPLS functionality. Security & Reliability Features MACsec encryption for secure 10/40/100GbE links DHCP snooping, DAI, CoPP for edge protection Redundant, hot-swappable PSUs and fans Reverse airflow (AFO) for thermal consistency Ideal Use Cases Spine in Leaf-Spine Architectures Designed for high-density 40GbE aggregation, with breakout options for flexible link speeds. High-Bandwidth Leaf Nodes Ideal for top-of-rack deployments requiring multiple 40/100GbE uplinks. Private/Hybrid Cloud Fabrics EVPN-VXLAN and automation tools make it perfect for cloud-scale multi-tenant environments. Metro Ethernet & Service Provider Edge MPLS and L3VPN capabilities support converged DC/metro service designs. Optics & Connectivity Options QSFP 40GbE: SR4, LR4, AOC, DAC QSFP28 100GbE: SR4, LR4, PSM4, CWDM4 Breakout DAC/AOC cables for 4×10GbE and 4×25GbE How It Stacks Up Against Other Juniper Models QFX5110-48S-AFO vs QFX5110-32Q-AFO: The 48S-AFO offers dense 10GbE access with 100GbE uplinks, while the 32Q-AFO targets high-bandwidth 40/100GbE aggregation and spine roles. QFX5120-48Y-AFO vs QFX5110-32Q-AFO: The QFX5120 family introduces 25GbE access with 100GbE uplinks, making it ideal for newer 25G/100G environments, while the QFX5110-32Q-AFO is optimized for 40GbE-heavy fabrics with breakout flexibility. QFX5100 Series vs QFX5110-32Q-AFO: QFX5110 adds MACsec, enhanced EVPN-VXLAN functionality, more automation features, and higher uplink bandwidth over the older QFX5100. QFX5200-32C vs QFX5110-32Q-AFO: QFX5200 supports high-density 100GbE with newer Broadcom Tomahawk ASICs, while the 32Q-AFO balances 40GbE aggregation with cost efficiency and breakout versatility. QFX10002-36Q vs QFX5110-32Q-AFO: The QFX10002-36Q is designed for core and spine roles at massive scale with deep buffers and heavy routing capabilities, whereas the QFX5110-32Q-AFO is ideal for mid-sized fabrics and high-performance leaf/spine deployments. Juniper QFX Series Reference Guides Juniper QFX vs EX Series Comparison – Choosing the Right Platform QFX5100 vs QFX5110 vs QFX5200 – Full Data Center Comparison Guide A Spine-Grade Switching Platform for Modern Fabrics The Juniper QFX5110-32Q-AFO is purpose-built for high-density 40GbE/100GbE environments requiring flexible breakout options, low latency, automation, and fabric-ready EVPN support. Whether serving as a spine switch, a high-uplink leaf, or an aggregation point, it offers the performance and scalability needed to support next-generation data center and cloud workloads. BrightStar Systems provides globally sourced QFX5110 switches backed by competitive pricing, industry-leading warranties, and expert configuration assistance.
