USRP X410 connection with 100Gb/s speed problem

[MikeYang]

Hello everyone,

I’m currently working on a Linux Ubuntu 24.04 system and using a USRP X410. I’d like to use a QSFP-100G-AC01 (100 G QSFP28 ACU) cable to connect my computer to the X410. By default, I’m able to achieve a 10 Gb/s transmission speed, but I’d like to configure the setup to use 100 Gb/s instead.

The attached files show the results of our 10 Gb/s tests, and now we’re trying to force the connection to operate at 100 Gb/s.

We also performed a loopback test on our computer using the two ports of the ConnectX-5 EN network interface card (ConnectX-5 100 GbE MCX516A-CCAT). In that configuration, each port showed a link speed of 50 Gb/s, as expected.

However, when we connect the cable to the X410 (QSFP28 port 0), the LED for port 0 blinks, but port 1 does not show any activity.

Could anyone please advise whether there’s something that needs to be activated or configured on the X410 to enable 100 Gb/s operation? Or is there an additional step I might be missing?

Thank you for your help!

Best regards,

Yang

[GDEV · Accepted solution]

Hi,

the available streaming interface on the USRP X410 is determined by the loaded FPGA image. By default this is the X4_200 image providing 4x10GbE link on sfp0 only, sfp1 is not used by this FPGA image. To use a 100GbE interface you need to use the CG_400 or UC_200 image. Please https://uhd.readthedocs.io/en/latest/page_usrp_x4xx.html#x4xx_updating_fpga for details on the precompiled FPGA images available with UHD and how to update the FPGA image.

Regards

[MikeYang]

Thank you very much for your reply. Yes, after using the correct CG_400 image, we were able to achieve a 100Gb/s connection, which was precisely the point cause of our previous issues.

Best Regards