Hi danilomario,
Thank you for contacting Intel.
You may use the QSFP+ Breakout Cable with Intel® QSFP+ Configuration Utility (QCU) to split the 40Gb port into 4x 10Gbps ports. This utility is included in adapter's driver. Refer to our websites below:
1. Intel® QSFP+ Configuration Utility (QCU) Quick Usage Guide
2. Network Adapter Driver for PCI-E 40 Gigabit download page
Feel free to contact us again if you need further assistance.
Sincerely,
Sandy