100 Gbe to 10 Gbe, is it possible?

[jswoboda]

I was able to get the GNURadio receiver example working right out of the box. This is great by the way!

This is more of a question of what is possible with this repository. We have a project where we would like to offload samples from the RFSoC 100 Gbe to a 10 Gbe port and GNURadio basically be the broker. Is it possible with the current framework of this project to adjust the 100 Gbe port to output to a 10 Gbe? I think the 100 Gbe with these boards is that they are just 4 individual 25 GBe systems glued together and 25 Gbe will just work with 10 Gbe. Am I totally off here? Any help would be great and I'm fine with the reduced amount of bandwidth I can handle. Basically we currently a 100 Gbe card into a power envelop for a system.

[marsiau]

Hi John,

Thanks a lot for your kind words!

Adjusting the design for 10 GBe shouldn't be a problem, but you'll need to adjust the ADC sampling rate, decimation and clocks to get the desired output data rate from the RF-ADC.

You're correct at the fact that 100 GBe QSFP28 can be split into 4x 25 GBe interfaces
this will require some changes to the CMAC core but the rest of the system should work ok as is.

Sadly I have not yet used the QSFP in 4x 25 GBe mode so I'm not too familiar with the changes required.

Do let me know how you get on with this!

Cheers,
Marius