- UPC:
- 816191010540
- Availability:
- 1-3+ Weeks - ETA
Purchase Protection
Every Order is Protected By BuySafe
Our commitment to sustainability ensures that every purchase supports responsible operations and a healthier planet.
SSL Secure Payment
We make sure your orders are processed as quickly as possible - stocked products are shipped next business day - Vendor direct ship products are processed directly with vendors with vendor leadtime.
Express Shipping
Price Match Guarantee
Your payment is secure
Your privacy and security are our top priority. Our advanced encrypted payment system protects your information during every transaction.

Get expert help
Our team of experienced professionals is always ready to help.
Product Details
The SFN8542-PLUS is capable of associating a hardware time-stamp with every incoming and outgoing Ethernet frame for application troubleshooting or performance monitoring. These features make the SFN8542-PLUS the ultra-low-latency Ethernet adapter of choice to deploy as a key component throughout Financial Trading infrastructures where either one or two ports of 40GbE or four ports of 10GbE are required.
CPU-Efficient Networking
The Flareon Ultra SFN8542-PLUS dual-port 40G Ethernet QSFP+ server adapter delivers faster, more efficient processing of network traffic to accelerate a wide range of applications. The SFN8542-PLUS has 16 lanes of PCIe 3.1 minimizing latency and maximizing bus throughput between the adapter and the host. The SFN8542-PLUS can also be configured as a quadport 10GbE adapter with one QSFP+ port operating as four 10GbE ports.
Flexibility in Operation
Configured either in 40GbE or 10GbE mode, in a virtualized environment the adapter supports hypervisor bypass via SRIOV providing virtualized guests with near baremetal network performance. Multiple physical functions are also available enabling the ports to be partitioned when connected to 802.1Q trunked switch ports with a logical interface per VLAN being presented to the operating system. Ports on the same adapter or across multiple adapters may be bonded for redundant operation. This redundancy support also extends to Onload® with accelerated sockets capable of running across both active-passive and active-active LACP-enabled links.
The SFN8542-PLUS provides the following licensed features enabled:
Ultra-Low Latency
The Flareon Ultra SFN8542 offers fast and efficient hardware that optimizes packet flow to and from the user application. The SFN8542-PLUS unlocks unrivaled sub-microsecond latency both at Layer 2 and TCP and UDP via Onload.
Onload
Onload is Solarflare's industry's leading fully RFC-compliant kernel-bypass user-space TCP/IP stack. Unrivaled applicationto-application TCP and UDP latency is available with no modification to the applications being accelerated. Applications may communicate via Onload to any other RFC-compliant TCP/IP stack with seamless interoperability.
Precision
Time The SFN8542 is equipped with a Stratum 3 oscillator providing class-leading clock stability. The SFN8542-PLUS enables the use of sfptpd, Solarflare's time synchronization daemon, which leverages the adapter's ability to apply hardware time-stamps to incoming and outgoing Ethernet frames to synchronize its oscillator either via the PTPv2 protocol or a combination of PPS and NTP. Sfptpd also enables the Linux real-time clock to be synchronized to the external timing reference via the adapter clock. Any time-stamps obtained from either packet events or via the Linux time API may now be correlated directly with the external timing source. These features allow users to implement event traceability that exceeds the MIFID II requirements.
- Bandwidth up to 40Gbps
- Latencies below 1µsec
- XtremePacket Engine provides 1000s of flows/virtual NICs per adapter
- APIs to software defined the adapter enabling a wide range of capabilities
- UKB enables extreme application acceleration
- Telemetry for packet capture, monitoring and analysis
- NIC-level security through packet filtering and secure server lockdown
Shipping & Return
Return Policy
You need to have a Return Authorization (RA) number before returning any products to HSSL Technologies.
For a hard copy of this form and a shipping label, please include your request in the form below.
You can also request an RA online by submitting an RA Request via email. Once you have provided HSSL Technologies with the appropriate information, we will contact you with an assigned RA number.
Defective or DOA Products
DOA or defective products are returned for REPLACEMENT ONLY with the same product/model. Deviations from this policy may result in a 20% Returns Processing Service Charge.
- Defective products must be in the original factory carton with all original packing materials.
- The Return Authorization number must be on the shipping label, not the carton. Please do not write on the carton.
- Returns must be shipped freight prepaid. Products received freight collect, without an RA number, or not approved for return will be refused.
- Return Authorization numbers are valid for fourteen (14) days only. Products returned after expiration will be refused.
- HSSL credits are based on the purchase price or current price, whichever is lower.
General Return Terms
You may return most new, unopened items within 30 days of delivery for a full refund. We will also pay return shipping costs if the return is a result of our error (e.g., you received an incorrect or defective item).
You should expect to receive your refund within approximately six weeks of giving your package to the return shipper. This period includes:
- 5–10 business days for us to receive your return from the shipper
- 3–5 business days for us to process your return
- 5–10 business days for your bank to process the refund
If you need to return an item, please Contact Us with your order number and product details. We will respond quickly with instructions for returning items from your order.
Shipping Policy
We can ship to virtually any address in the world. Note that there are restrictions on some products, and certain products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates based on the availability of your items and the shipping options you select. Depending on the provider, estimated shipping dates may appear on the shipping quotes page.
Please also note that shipping rates for many items are weight-based. The weight of each item can be found on its product detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Has my order shipped?
Click the "My Account" link at the top right hand side of our site to check your orders status.
How do I change quantities or cancel an item in my order?
Click the "My Account" link at the top right hand side of our site to view orders you have placed. Then click the "Change quantities / cancel orders" link to find and edit your order. Please note that once an order has begun processing or has shipped, the order is no longer editable.
How do I track my order?
Click the "My Account" link at the top right hand side of our site to track your order.
My order never arrived.
Click the "My Account" link at the top right hand side of our site to track your order status. Be sure that all of the items in your order have shipped already. If you order displays your Package Tracking Numbers, check with the shipper to confirm that your packages were delivered. If your packages each show a status of "delivered", please contact customer service for assistance.
An item is missing from my shipment.
Click the "My Account" link at the top right hand side of our site to track your order status. Be sure that all of the items in your order have shipped already. If you order displays your Package Tracking Numbers, check with the shipper to confirm that your packages were delivered. If your packages each show a status of "delivered", please contact customer service for assistance.
My product is missing parts.
Click the "My Account" link at the top right hand side of our site to track your order status. Be sure that all of the items in your order have shipped already. If you order displays your Package Tracking Numbers, check with the shipper to confirm that your packages were delivered. If your packages each show a status of "delivered", please contact customer service for assistance.
When will my backorder arrive?
Backordered items are those which our suppliers are unable to predict when they will have more in stock, but as soon as they do, we will be able to ship the item to you.
Warranty
Why Choose HSSL?
We connect businesses with the right technology solutions to power growth, security, and efficiency.

Expertise
Backed by years of industry knowledge, our specialists understand the challenges modern businesses face.

Partnerships
We collaborate with top-tier technology providers to bring you innovative & high-performance products.

End-to-End Support
Our dedicated support ensures your systems stay optimized, secure, and ready for what’s next.

Scalable Solutions
Our adaptive approach ensures your IT infrastructure evolves seamlessly as your business expands.
Expert in IT & Security Solutions
At HSSL, we specialize in delivering cutting-edge IT infrastructure, cloud, and cybersecurity services that empower businesses to thrive in a digital-first world. Our trusted professionals provide reliable insights on:
-
Digital Transformation Strategy
Empowering businesses to adapt and grow through modern, secure, and scalable digital infrastructure.
-
Advanced Cybersecurity
Protecting your organization from digital threats with proactive monitoring and smart security frameworks.
-
Cloud & Infrastructure Management
Optimizing cloud performance and IT operations for seamless scalability and improved business agility.
-
Data Backup & Recovery
Ensuring business continuity through secure data management, automated backups, and rapid recovery solutions.
-
Network & Endpoint Solutions
Delivering secure, high-performance networking systems that keep your business connected and efficient.
-
Technology Consulting
Guiding organizations toward smarter IT investments and solutions that align with their long-term goals.
You May Also Like
Customers Who Bought This Product Also Bought
