DPDK port loop back

[ppacch]

I have one DPDK E810 card. While waiting for a second card, I would like to test the configuration and therefore loop back two ports. Is the Câble QSFP28 100G DAC Cisco QSFP-100G-CU1M Compatible - FS.com Europe cable the right one to use for this loopback? Thank you for your information/advice.

[Vik3]

Hello ppacch,

Greetings from Intel,

Thank you for bringing the DAC cable compatibility with Intel Ethernet Controller E810 to our attention.

We have noted your report and are currently reviewing the case. Rest assured, we will thoroughly investigate the matter and get back to you as soon as possible. If you have any further questions or additional information to share.

Please feel free to reply to this email. We're here to assist you every step of the way.

Regards,

Vikas_Intel

[Azhari_Intel]

Hello ppacch,

Good day to you!

Kindly help to specify the exact E810 model that is being used.

Also, please help to share the front and back picture of the NIC showing visible markings.

As example, we may see the E810-CQDA supports QSFP28 ports - DAC, Optics and AOC's which are available in ARK specification.

Please check product brief and specification here: Intel® Ethernet Network Adapter E810-CQDA2

Hence, as per the product link that was shared, passive DAC will work for loopback on an Intel E810-CQDA2.

You may also check compatible brands listed in the product link that you had shared as well.

Please let us know if the above information are helpful or if you require further assistance.

Best Regards,

Azhari_Intel

[ppacch]

Thank you for your feedback. Here are the photos you requested. I hope this will enable you to confirm the purchase of this loopback cable while waiting to be able to network the cards.

Regardss

Pierre

  

[Dineshbabu]

Hello ppacch,

Greetings!

Thank you for your response. Based on the picture that you have shared we see this is Intel® Ethernet Network Adapter E810-XXVDA4 and it will support only SFP28 ports - DAC. Please find the below link 

https://www.intel.com/content/www/us/en/products/sku/192560/intel-ethernet-network-adapter-e810xxvda4/specifications.html

Please let us know if you need further assistance.

Regards,

Dinesh

Intel Customer Support Technician

[ppacch]

ok thanks - we also investigated on our side and effectively , the Cisco QSFP-100G-CU1M cable (QSFP28 100G DAC Twinax 1m) cannot be used directly on an Intel E810-XXV-4 network card.
Main reason: The Intel E810-XXV-4 is a 4-port SFP28 card (10/25 Gbps per port), designed for SFP28 modules/cables (25G DAC, SR, LR) or backward-compatible SFP+ (10G). It does not have QSFP28 (100G) ports, which are present on other variants such as the E810-CQDA2 (2x QSFP28).
We found Compatible alternatives
• Use a SFP28 25G DAC cable (e.g., Intel XXVDACBL1M or generic 1m equivalent).
• For 100G, choose a card with QSFP28 ports (e.g., E810-CQDA1/2).

The Intel SPR E10GSFPLR (or E10GSFPLR) module is a 10GBASE-LR optical SFP+ transceiver designed for 10 Gbit/s Ethernet links. It uses only single-mode fiber (SMF) with a wavelength of 1310 nm, supporting distances of up to 10 km via LC duplex connectors.

In principle, we would need an SFP28 25G DAC cable (e.g., Intel XXVDACBL1M or generic equivalent, 1 m).

Otherwise, we are currently working with our IT  to obtain a 1310 nm single-mode fiber (SMF).

https://edgeoptic.com/products/intel/e10gsfplr

https://www.perplexity.ai/search/module-spr-e10gsfplr-type-de-f-ZVtgON5jRq2utdtBUK4pbQ#0

So, based on your answer, I guess any cable that supports SFP28 ports is okay?

[ppacch]

Maybe  I was not clear but what is the exact reference number for an Intel SFP28 DAC cable to create a loopback between two ports on this card? Such as Intel XDACBL1M - DAC SFP28 1m? Intel XDACBL1M Câble SFP+ 10G DAC Twinax - 1m - FS.com Europe

Don't really uinderstand your answer ... 

[Dineshbabu · Accepted solution]

Hello ppacch,

Thank you for your response. Yes, you are correct. To clarify, the adapter that you are using has only SFP28 ports (Up to 25G) and does not support a QSFP28 DAC cable. Therefore, we recommend using an SFP28 DAC cable that supports 25G and performing a loopback test.

For more information, please refer below link:

https://www.intel.com/content/www/us/en/ark/products/series/184846/intel-ethernet-e810-network-adapters-up-to-100gbe.html

Product Brief:

https://cdrdv2-public.intel.com/641676/Intel%20Ethernet%20Network%20Adapter%20E810-XXVDA4%20Product%20Brief.pdf

Regards,

Dinesh

Intel Customer Support Technician