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Cisco

Cisco FET-40G | 40Gb QSFP+ | 40GBASE-SR4 | MMF 850nm | 100m OM3 / 150m OM4 | MPO-12 | FEX-optimized

SKU:FET-40G

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Description

High-density 40Gb QSFP+ short-reach optic tailored for Fabric Extender uplinks. Provides 40GBASE-SR4 over multimode fiber using MPO-12 connectors for streamlined spine-leaf or parent switch aggregation.

Features

- Purpose-built for high-bandwidth FEX uplinks
- Cost-effective 40G over MMF with MPO-12 connectivity
- Hot-swappable QSFP+ for rapid serviceability
- Low latency, high throughput for aggregation layers

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: Is this the same as a general-purpose QSFP-40G-SR4?
A: It implements 40GBASE-SR4 but is qualified for Fabric Extender uplinks to parent switches.

Q: Which cable do I need?
A: Use OM3/OM4 multimode fiber with MPO-12 connectors; pre-terminated MTP/MPO trunks are recommended.

Q: What distances are supported?
A: Up to 100 m on OM3 and 150 m on OM4.

Q: Can I break out to 4x10G?
A: This optic is intended for 40G SR4 FEX uplinks; breakout support depends on platform capabilities and configuration.

Technical Specifications

- Data rate: 40 Gbps
- Form factor: QSFP+
- Ethernet standard: 40GBASE-SR4
- Wavelength: 850 nm
- Fiber type: MMF (OM3/OM4)
- Reach: up to 100 m (OM3), 150 m (OM4)
- Connector: MPO-12 (MTP/MPO)
- Application: Fabric Extender (FEX) uplinks to parent switches
- Digital diagnostics (DOM/DDM): supported
- Hot-swappable: yes

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