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Description
StarTech.com Arista QSFP-40G-XSR4 Compatible QSFP+ Module - 40GBASE-SR4 - 40GE QSFP+ 40GbE Multimode Fiber Optic Transceiver 400m DDMElevate your data center networking with this StarTech. com QSFP 40G XSR4 compatible QSFP+ transceiver. Engineered to deliver reliable 40 GbE connectivity over multimode fiber, its designed to work seamlessly with Arista switches and routers. This 40GBASE SR4 module combines high performance, easy integration, and robust diagnostics to support modern, high density networks. Whether youre upgrading uplinks, inter switch connections, or data center
Elevate your data-center networking with this StarTech.com QSFP-40G-XSR4 compatible QSFP+ transceiver. Engineered to deliver reliable 40 GbE connectivity over multimode fiber, it’s designed to work seamlessly with Arista switches and routers. This 40GBASE-SR4 module combines high performance, easy integration, and robust diagnostics to support modern, high-density networks. Whether you’re upgrading uplinks, inter-switch connections, or data-center fabric fabrics, this transceiver provides a cost-effective, plug-and-play solution with excellent compatibility and monitoring capabilities.
- 40GbE over MMF: This QSFP+ module channels four 10 Gbps SR lanes to deliver high-bandwidth, low-latency 40GbE performance over multimode fiber, making it ideal for data-center spine-leaf architectures, server-to-switch links, and high-speed uplinks.
- Arista compatibility and reliability: Specifically designed, programmed, and tested to work with Arista brand switches and routers, ensuring dependable interoperability and a smooth deployment experience in mixed-vendor environments.
- Extended reach with MMF cabling: Supports up to 400 meters on appropriate multimode fiber cabling, enabling flexible topology designs and longer interconnections within data centers while preserving signal integrity and performance.
- Digital Diagnostics Monitoring (DDM): Includes built-in DDM to continuously monitor critical optical parameters such as optical power, temperature, and transmitter bias, enabling proactive maintenance and rapid issue detection.
- Plug-and-play, hot-swappable design with vendor support: The QSFP+ form factor allows quick replacement or upgrades with minimal downtime, backed by StarTech.com’s warranty and comprehensive technical support for enterprise deployments.
Technical Details of StarTech.com Arista QSFP-40G-XSR4 Compatible QSFP+ Module
- Model compatibility: QSFP-40G-XSR4 compatible transceiver designed to work with Arista equipment
- Data rate: 40 Gbps total (composed of four 10 Gbps SR lanes)
- Standards: 40GBASE-SR4 compliant, aligned with IEEE 802.3ba and applicable industry specs
- Fiber type: Multimode fiber (MMF) configured for short-reach 40G connections
- Reach: Up to 400 meters on suitable MMF cabling and proper fiber infrastructure
- Wavelength: 850 nm VCSEL transmitters suited for multimode applications
- Interface: QSFP+ form factor for easy installation in standard switches and routers with QSFP+ ports
- Diagnostics: Digital Diagnostics Monitoring (DDM) support for real-time health and performance data
- Compatibility scope: Verified compatibility for Arista QSFP-40G-XSR4 network configurations and related 40GBASE-SR4 deployments
- Operating conditions: Designed for typical data-center environments with standard temperature and power requirements
How to install StarTech.com Arista QSFP-40G-XSR4 Compatible QSFP+ Module
Follow these steps to install the StarTech.com QSFP-40G-XSR4 module and establish a reliable 40 GbE link in an Arista environment. The process is designed to be straightforward and minimizes downtime while ensuring correct alignment and connection.
- Power down the switch or router port according to your device’s maintenance procedures, or use the vendor’s hot-swapping guidelines if supported by the chassis.
- Remove any existing transceiver from the target QSFP+ port and inspect the slot to ensure it is clean and undamaged before insertion.
- Insert the StarTech.com QSFP+ module firmly into the available QSFP+ port until it seats with a definitive click, confirming proper engagement with the host device.
- Connect the multimode fiber cable to the transceiver using the appropriate harness or fiber connectors as required by your network design, ensuring correct lane orientation and polarity as per your topology.
- Power on the device, then verify the port status for a stable 40G link using your network management tool or switch CLI. Use DDM readings to confirm optical health and monitor for any deviations.
Frequently asked questions
- Q: What is the StarTech.com QSFP-40G-XSR4 compatible module designed for? It’s designed to deliver 40GbE connectivity over multimode fiber using the 40GBASE-SR4 standard, with verified compatibility for Arista networking equipment to support data-center interconnects and high-density links.
- Q: Does this module support Digital Diagnostics Monitoring (DDM)? Yes. DDM provides real-time insight into optical power, temperature, and other health metrics to help you monitor link quality and preempt potential failures.
- Q: What is the maximum distance this transceiver can reach? The module supports up to 400 meters on appropriate multimode fiber cabling, enabling flexible layouts and longer interconnects within data centers.
- Q: Is this a genuine Arista module? No. It is a StarTech.com-compatible transceiver designed to emulate the Arista QSFP-40G-XSR4 interface and work with Arista devices, offering a cost-effective alternative with StarTech.com support and warranty.
- Q: How do I verify a successful installation? After installation, check for a stable 40G link status in your switch management interface, review DDM values for optical health, and perform a short throughput test to confirm performance meets your network requirements.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.5 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Sturdy, high quality, and protective
Color: Green, Size: 15-inch for New MacBook Air
This is my third TomToc laptop sleeve. Each time, I bought another, less expensive brand first and returned it. TomToc offers the best protection in a soft-shell sleeve.
Immediately when you open it, you feel the higher quality material and density. It’s not heavy, but it is thick padded and doesn’t easily bend with pressure. The zipper is built to last, sturdy, and easy to operate without that chintzy feeling from cheap zippers.
If you pay attention to the construction, you quickly see why it’s about double in price. There is an inner pad to protect the laptop from not just drops and shock, but also from the zipper. The corners are reinforced and add extra protection. It is definitely worth double the price.
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Reviewed in the United States on April 11, 2026
★★★★★ 5
Great Protection
Color: Orange, Size: 13-inch for New MacBook Air & Pro
This is a very nice, protective case. The material is thick and cushions the laptop great! Computer fits nice and cozy; great fit. I love the bright orange! I highly recommend.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
A sold, attractive, case.
Color: Navy Blue, Size: 13-inch for New MacBook Air & Pro
This case looks great, has a nice, lively color scheme, and seems to be reasonably protective and sturdy. I wouldn’t toss a laptop around with only this as protection, but I feel fairly confident in it for small drops. The fabric is easy to clean and has held up well. You can charge without taking it out of the case thanks to a zipper, and it doesn’t add much bulk, making it quite portable. All in all a good balance of protection, cost, and style.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
I would rescue it from a fire even if it were empty. I'm kidding but I do like this sleeve a lot.
Color: Orange, Size: 13-inch for New MacBook Air & Pro
Fits perfectly. Superb padding. The corner padding inspires confidence-not that I want to test it! The orange color is-chef's kiss-beautiful. A perfect contrast to the midnight color of my MacBook. I could gush about that stuff all day. But you all want to know about the other stuff.
Zippers: Two YKK no snag bi-directional closers for the main opening and a solo no snag YKK for the side pocket.
Outside: Feels like tactical nylon type fabric. I haven't and won't intentionally test its stain resistance. But I suspect it would clean up just fine.
Interior: A very soft microfiber like interior covering an odor free padding that is firm yet forgiving. There is a recess you push your laptop into making for a snug fit that, like I wrote earlier, inspires confidence. This sleeve is larger than some competing brands but seeing the recess in person explains why.
Having touched on the size of this sleeve, it maintains the svelteness of my MacBook Air. Yes, it is thicker than some other sleeves, by a smidge. However the additional protection suggested but that smidge, that minute extra ish is worth it to me. The sleeve fits in my travel backpack, so that's all good.
Lastly, I would consider putting a tablet or phone in the sidepocket but not anything that would concentrate the any energy that dissipates during a fall. Had I designed this product I wouldn't have included the side pocket. It's great for documents and thin things but the sell page suggests chargers. That seems like inviting risk. You do you.
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Reviewed in the United States on January 22, 2026
★★★★★ 4
Better Lips, Better Fit, Less Nonsense
Color: Black, Size: 13-inch for New MacBook Air & Pro
I tested this sleeve with a 13.6” MacBook Air (M4), and the difference is immediately noticeable.
First thing: fit. This one actually holds the laptop in place. The padded “lips” in the corners create just enough resistance that you have to guide the MacBook in and out. It’s not a loose drop-in like other cases — it feels controlled. If I shake it, there’s barely any movement, which is exactly what I was looking for.
Second: build quality. The stitching is clean and consistent — almost surgical compared to the wrinkled mess I saw on another model. The outer fabric stays flat, no weird waves or cheap-looking folds. The interior lining is softer and thicker too, so it feels more protective without being bulky.
Third: structure. I even did a quick “real-world” test — stood it vertically on a mattress, zipper open, applied pressure from the top — and it held its shape. The other case I tried would have collapsed immediately. This one actually feels like it can handle normal use without transferring pressure straight into the laptop.
The external pocket is simple but practical. It fits the charger brick and cable without interfering with the main compartment, which keeps the laptop fit intact.
Only downside: I could do without the orange accents. A full black version would be perfect. But honestly, that’s cosmetic — functionally, this one does what it’s supposed to do.
At around this price point, this feels fair. Not luxury, not overhyped — just a well-executed, practical sleeve that gets the fundamentals right.
Bottom line: not perfect, but finally something that feels properly made and actually holds the laptop instead of just surrounding it.
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Reviewed in the United States on March 29, 2026
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