Juniper QFX5240 Switch
According to Juniper, the QFX5240 series is designed for spine, leaf and border roles in data center fabrics, especially for large AI and ML clusters. For these workloads the switches support RoCEv2 with DCQCN, PFC and ECN as well as dynamic load balancing.
The 2 U models offer 64 ports of 800GbE (OSFP or QSFP-DD) and up to 102.4 Tbps bidirectional, while the QFX5241-32OD offers 32 ports of 800GbE in 1 U. Breakout allows up to 128 × 400GbE or 320 × 100GbE. Power supplies and fans are redundant and hot-swappable. Variants for Open Rack v3 (ORv3) are also available. The operating system is Junos OS Evolved.
We are happy to advise you on project and volume enquiries. On request, DEVACON handles planning, configuration and commissioning.
Key facts from the Juniper datasheet
- 64 × 800GbE in 2 U or 32 × 800GbE in 1 U (QFX5241-32OD), each plus 2 × 10GbE SFP+
- Up to 102.4 Tbps bidirectional, 21.2 billion packets per second (64-port models)
- Breakout up to 128 × 400GbE, 256 × 200GbE or 320 × 100GbE
- Redundant (1+1) hot-swappable power supplies: 3000 W (2 U) or 2400 W (1 U)
- 165 MB packet buffer (2 U) or 83 MB (1 U), latency from 750 ns (cut-through)
- RoCEv2, DCQCN, PFC, ECN, dynamic load balancing, EVPN-VXLAN
- Junos OS Evolved, Broadcom Tomahawk 5
Areas of use
- Spine and leaf in AI and ML clusters
- Spine, leaf and super spine in EVPN-VXLAN fabrics
- Connecting servers with 200/400GbE NICs
Models and key specifications
| Model | Ports | Height | Throughput |
|---|---|---|---|
| QFX5240-64OD | 64 × 800GbE OSFP + 2 × 10GbE SFP+ | 2 U | 102.4 Tbps |
| QFX5240-64QD | 64 × 800GbE QSFP-DD + 2 × 10GbE SFP+ | 2 U | 102.4 Tbps |
| QFX5241-64OD | 64 × 800GbE OSFP + 2 × 10GbE SFP+ | 2 U | 102.4 Tbps |
| QFX5241-64QD | 64 × 800GbE QSFP-DD + 2 × 10GbE SFP+ | 2 U | 102.4 Tbps |
| QFX5241-32OD | 32 × 800GbE OSFP + 2 × 10GbE SFP+ | 1 U | 51.2 Tbps |
Throughput bidirectional. QFX5241 models also available as Open Rack v3 (ORv3) variants with 1 OU or 2 OU. Airflow ports-to-PSU (AFO).
Source of information: hpe.com Datenblatt (PDF)
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