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NT40A11 SmartNIC
with Link-Capture™ Software

4x1G, 4×1/10G

Use cutting-edge SmartNIC technology to add real-time line- rate performance to your application. The NT40A11 SmartNIC provides full packet capture of network data at 40 Gbps with zero packet loss. Nanosecond precision time-stamping and merge of packets from multiple ports ensures correct timing and sequencing of packets. The NT40A11 SmartNIC can also be used for 100% packet replay with nanosecond precision of all networking traffic for analytics, testing and simulation.

The NT40A11 SmartNIC enables full utilization of CPU cores through advanced receive side scaling with support for tunneling protocols, such as GTP, IP-in-IP, NVGRE and VxLAN. The NT40A11 SmartNIC can also remove duplicate packets, slice packets and filter packets to reduce the amount of data and thereby offload the server system and applications. Stateless flow processing with support for up to 36,000 flows enables CPU-hungry applications to intelligently select exactly which flows to process and which to ignore.

To accommodate seamless Integration in any server, the NT40A11 is available with active or a passive cooling. The passive cooling model is also NEBS compliant to meet telco requirements.








Napatech SmartNICs enable implementation of high- performance network appliances based on standard servers. Examples of applications include:

  • Quality of experience optimization
  • Financial latency measurement
  • Customer experience analysis
  • Data loss prevention
  • Cyber defense
  • Fraud detection and compliance management
  • Infrastructure management and security
  • Network and application performance
  • Troubleshooting and compliance

Compatible Capture Software

Link-Capture™ Software

Link-Capture™ Software

Link-Capture™ Software is ideal for performing high-speed packet capture with nanosecond timestamping and replay with precise inter-frame gap control.

NT40A11-SCC SmartNIC


To generate and control the airflow, the Napatech design contains a blower that takes in air from the top and bottom of the SmartNIC, thereby doubling the amount of air and ensuring superior cooling.


  • Durable design for extended real-life operation
  • Free choice of server platform
  • Reduced noise and power-consumption as server-fans can run at minimum speed
  • Freedom to pack unlimited FPGA SmartNICs into a standard server


  • No airflow dependency to server
  • Well-defined cooling of all critical components
  • Guaranteed device hot spot temperatures
  • Maximized airflow, ensuring optimal thermal performance
  • Dissipated energy exhaled outside server through front plate cutouts
  • Significant reduction in temperature drop between FPGA die and heat sink surface
  • Mechanical stiffener enabling higher screw torque for fastening heatsink to the PCB


Napatech upholds the highest quality, environmental and safety standards, and complies with all applicable regulations across regions. This helps our customers to realize a seamless integration without delays – and ensures error-free operation throughout the product life cycle.

Ethernet Front Port Compliance

The SmartNIC design maximizes mechanical and electrical front port margin, securing trouble-free operation with the optical or electrical modules of the customer’s choice.

The thermal design is validated dissipating the maximum power level as standardized for the given form factor. Margin on the data interface has been optimized tuning the equalization parameters of the transceivers hosting the front port channel, maximizing EYE margin to the relevant standard.

EMC Compliance

All Napatech designs have passed EMC compliance testing for major regions, including Europe and North America. By ensuring compliance as an integral part of the design, the risk of delays is eliminated. Moreover, the EMC testing has been performed in a mainstream server, potentially directly applicable to the use case.

Environmental Compliance

The end product (server + installed SmartNIC) must adhere to regional environmental legislation. To enable trouble-free server integration, Napatech SmartNICs are manufactured using only materials that fully comply with the current RoHS, REACH and proprietary Tier 1 legislation.

Full compliance from early inception eliminates the risk delays and product withdrawal due to authority intervention.

Event Handling & System Monitoring

In order for the SmartNIC to become an integral part of the server environment and maximize uptime, it needs to monitor and expose key performance metrics to the application during operation. Napatech SmartNICs monitor the following metrics:

  • Blower speed
  • Hot spot temperatures
  • Key supply voltages and currents
  • PCI protocol events
  • General system events

PCI Compliance

With the PCI interface on the SmartNIC dictated by the server plane, the hardware maximizes mechanical and electrical PCI margin, ensuring trouble-free operation in the server and server slot(s) of the customer’s choice. All designs have passed relevant PCI-SIG tests and have been adopted on the PCI-SIG integrators list.

Safety Compliance

To enable trouble-free server integration, Napatech SmartNICs are fully compliant with all applicable safety standards.

By ensuring safety compliance as an integral part of the SmartNIC design, the risk of delays is eliminated. Compliance testing is performed in a mainstream server, potentially directly applicable to the use case.

Conflict Minerals Compliance

To ensure quick and trouble-free server integration, Napatech SmartNICs are manufactured using only materials that fully comply with the relevant Conflict Mineral Legislation. For US based SmartNIC integrators, this facilitates submission of the mandatory Conflict Mineral report to SEC.

Shock & Vibration Robustness

Many server environments expose the SmartNIC to substantial shock and vibration, predominantly during the transportation phase. To ensure trouble-free server integration and operational robustness throughout the product life cycle, validated design aspects include:

  • Cooling enclosure for superior mechanical stiffness
  • Key exposed components are under-filled (glued) to the PCB
  • Shock robustness validated against JESD22-B110A
  • Vibration robustness validated against ASTM D4169-09

Used across industries

Security data collection

In order to protect networks from the most advanced cyber threats, our solutions deliver data to security applications such as:
  • Intrusion Detection Systems / Intrusion Prevention Systems (IDS/IPS)
  • Unified Threat Management (UTM)
  • Security Information and Event Management (SIEM)
  • Data Loss Prevention (DLP)
  • Advanced Persistent Threats (ATP)
Security data collection systems make it possible to discover and contain threats faster based on real-time data from critical network links.

Cyber defense

Our solutions deliver data to applications that help governments see all data running through their networks. Recognizing malicious packages and suspicious patterns allows governments to take preemptive measures to stop criminals before or during an attack, safeguarding sensitive government information as well as the personal data of citizens.

Quality of experience optimization

Our solutions deliver data security to applications that analyze quality of experience. Doing so enables telecoms to improve quality, while better managing the bandwidth challenges posed by rich media applications.

Network behavior simulation

Our solutions deliver data to, and receive data from, applications that enable telecom operators to simulate real-life subscriber behavior with a variety of applications and services. These applications generate insights that lead to better decision-making regarding infrastructure, service upgrades, and deployment.

Feature Highlights and Specifications


Rx Packet Processing
  • Zero packet loss for packet size 64 – 10,000 bytes
    • Sustained traffic up to 40 Gbps
    • Line rate 4 x 10 Gbps traffic burst, 800 milliseconds buffering
  • Multi-port packet merge, sequenced in time stamp order
  • L2, L3 and L4 protocol classification
  • L2 and L3/L4 (IP/TCP/UDP) checksum verification
  • GTP, IP-in-IP, GRE, NVGRE, VxLAN, Pseudowire, Fabric Path, VNtag tunneling support
  • Pattern match, network port, protocol, length, and error filters
  • Custom flow definitions based on 2-, 3-, 4-, 5- or 6-tuple
  • Flow match/actions: Forward to application or network port or drop packet
  • Flow filtering
    • Up to 36,000 IPv4 or up to 7,500 IPv6 2-tuple flows
  • Custom hash keys, symmetric hash key option
  • CPU load distribution based on hash key or filter or per flow
    • To local CPU cores via host buffers/queues
  • 128 Rx queues, 16 MB – 1 TB Rx buffer size
  • Packet descriptors with metadata
  • IP fragment handling
  • Deduplication
  • Slicing at dynamic offset or fixed offset from start or end of packet
  • Extended RMON1 and counters per filter and per queue
Tx Packet Processing
  • Line rate Tx up to 40 Gbps for packet size 64 – 10,000 bytes
  • Replay as captured with nanoseconds precision
  • Per-port traffic shaping
  • Port-to-port forwarding
  • 128 Tx queues, 4 MB Tx buffer size
Time Stamping
  • Rx time stamp
  • Time stamp formats: Unix 10 ns, Unix 1 ns, PCAP 1 us, PCAP 1 ns
Network Standards
  • IEEE 802.3 1G, 10G Ethernet
Supported pluggable modules
  • 1000BASE-T, SX, LX, ZX
  • 10GBASE-T, SR, CR, LR, ER
  • Operating systems: Linux and Windows
  • libpcap, WinPcap and DPDK
  • Napatech NTAPI for highest performance and advanced features
  • SDK tools included in source code for debugging and prototyping and as application examples
  • Xilinx KU11P FPGA
  • PCIe Gen3 8 lanes @ 8 GT/s
  • 4 × SFP+ network ports
  • Flash memory with support for two boot images
  • Built-in thermal protection
  • Physical dimensions: 1⁄2-length and full-height PCIe
  • Weight excluding pluggable modules:
    • NT40A11-SCC: 316 g
    • NT40A11-NEBS: 317 g
  • MTBF according to IEC TR 62380 (UTE C 80-810 –2004):
    • NT40A11-SCC: 830,076 hours
    • NT40A11-NEBS: 1,139,242 hours
  • Power consumption including 10GBASE-SR modules and typical traffic load:
    • NT40A11-SCC: 24 Watts
    • NT40A11-NEBS: 24 Watts
Environment for NT40A11-SCC (active cooling)
  • Operating temperature: 0 °C to 45 °C (32 °F to 113 °F)
  • Operating humidity: 20% to 80%
Environment for NT40A11-NEBS (passive cooling)
  • Operating temperature: –5 °C to 55 °C (23 °F to 131 °F) measured around the SmartNIC
  • Operating humidity: 5% to 85%
  • Altitude: < 1,800 m
  • Airflow: >= 2.5 m/s
Regulatory Approvals and Compliances
  • PCI-SIG®, NEBS level 3, CE, CB, RoHS, REACH, cURus (UL), FCC, ICES, VCCI, RCM
Product: Data Rates included:
NT40A11-4×1 4 × 1 Gbps
NT40A11-4×10/1 4 × 1/10 Gbps

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Find out if the Napatech NT40A11 SmartNIC is right for you
– our engineers will help you all the way.