Juniper Networks QFX5120-48YM Enterprise Leaf Switch
Brand: Juniper | Category: Network Switches
SKU: JUNI-QFX512048YM | Part #: QFX5120-48YM | MPN: QFX5120-48YM
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About the Juniper Networks QFX5120-48YM Enterprise Leaf Switch
The Juniper Networks QFX5120-48YM Enterprise Leaf Switch from Juniper is enterprise-grade Network Switches hardware built for data centers. 48-port 25G MACsec-enabled enterprise leaf switch engineered for lossless AI/ML GPU cluster east-west fabric with enhanced buffer architecture. Available in brand new condition. Juniper network switches products are trusted by enterprises and data centers worldwide. Available from Omnixon Global. Contact our sales team to request a quote.
Technical Specifications
| Brand | Juniper |
| Category | Network Switches |
| SKU | JUNI-QFX512048YM |
| Part Number | QFX5120-48YM |
| Condition | New |
| Product Line | QFX5120 Series |
| Model | QFX5120-48YM |
| Form Factor | 1RU |
| Total Switching Capacity | 2.4 Tbps |
| Forwarding Rate | 1.78 Bpps |
| Server-Facing Ports | 48 x SFP28 (1G/10G/25G multi-rate) |
| Uplink Ports | 8 x QSFP28 (40G/100G) |
| MACsec (IEEE 802.1AE) | Hardware MACsec AES-256-GCM on all 48 front-panel ports, line-rate, no throughput degradation |
| Packet Buffer | Enhanced deep shared buffer architecture (exact depth optimized for GPU collective communication burst absorption) |
| DCB / Lossless Features | Priority Flow Control (PFC, IEEE 802.1Qbb), Enhanced Transmission Selection (ETS, 802.1Qaz), ECN (Explicit Congestion Notification), DCBX |
| RoCEv2 Support | Full hardware-assisted lossless RoCEv2 transport for NCCL, OpenMPI, and RDMA workloads |
| Routing Protocols | BGP, OSPF, IS-IS, ECMP, BFD, IPv4/IPv6 unicast and multicast |
| Overlay / Virtualization | EVPN-VXLAN (RFC 7348), EVPN Type-2/Type-5 routes, IRB, VLAN-aware bundle service |
| Operating System | Junos OS with Junos Evolved (JunosE) support |
| Automation & Telemetry | gRPC/gNMI streaming telemetry, OpenConfig, NETCONF/YANG, Juniper Apstra integration, RESTCONF |
| ECMP & Load Balancing | Up to 128-way ECMP, adaptive load balancing, resilient hashing |
| Management Interfaces | Out-of-band 1G Ethernet management port, RS-232 console, USB |
| Power Supply | Dual hot-swappable redundant PSUs, front-to-back and back-to-front airflow options |
| Typical Power Draw | Approximately 300–350W (full configuration with optics) |
| Operating Temperature | 0°C to 45°C |
| Launch Quarter | 2025-Q4 |
| Standards Compliance | IEEE 802.1Q, 802.1ad (QinQ), 802.3ad (LACP), 802.1AE (MACsec), 802.1X, 802.1Qbb, 802.1Qaz, 802.3x |
Frequently Asked Questions about Juniper Networks QFX5120-48YM Enterprise Leaf Switch
What does the Juniper Networks QFX5120-48YM Enterprise Leaf Switch do?
The Juniper Networks QFX5120-48YM Enterprise Leaf Switch is enterprise networking hardware for data-center, campus, and branch deployments. Common roles include core/distribution switching, server uplinks, top-of-rack fabric, and edge connectivity in mixed Cisco/Juniper/Arista environments.
What are the headline specs of the Juniper Networks QFX5120-48YM Enterprise Leaf Switch?
Key specifications for the Juniper Networks QFX5120-48YM Enterprise Leaf Switch: new condition; manufacturer Juniper Networks; product line QFX5120 Series; model QFX5120-48YM; form factor 1RU; total switching capacity 2.4 Tbps; forwarding rate 1.78 Bpps. Manufacturer part number QFX5120-48YM. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
Is the Juniper Networks QFX5120-48YM Enterprise Leaf Switch compatible with my infrastructure?
The Juniper Networks QFX5120-48YM Enterprise Leaf Switch interoperates with standard switching protocols (LACP, MLAG/VPC, 802.1Q, OSPF/BGP). For specific cross-vendor scenarios — Cisco-to-Arista MLAG peering, fabric integration with Cumulus/SONiC, or migration from legacy Catalyst — our network engineers map a compatibility plan as part of the RFQ.