X710 NIC - record frames with bad CRC

[KevinCh]

I have an issue whereby my X710 NIC is reporting occasional CRC errors in ethtool -S output. In these fields:
rx_crc_errors: 3
port.rx_crc_errors: 3

I'm fairly sure the NIC itself is OK, it's likely the sending NIC that's the issue. However, I need to capture the offending frames so that I can look at them and see if I can work out which bits are incorrect in the data.

The issue I'm having is that frames failing that CRC check are dropped at a very low level. I thought I might be able to use the AQ commands to forward them to another interface for inspection, but I don't seem to be able to get it to work.

So, is there any way that I can retrieve the bad frames? Or, are they just dropped in the hardware in some irretrievable way?

Output from ethtool -i looks like this:

driver: i40e

version: 5.14.0-570.el9.x86_64

firmware-version: 9.00 0x8000cfed 21.5.9

expansion-rom-version:

supports-statistics: yes

supports-test: yes

supports-eeprom-access: yes

supports-register-dump: yes

supports-priv-flags: yes

[pujeeth]

Hello KevinCh,

Greetings!!

Thank you for bring the issue to our attention,

We understand that you are receiving CRC errors on an Intel X710 network interface card (NIC) and you are trying to inspect the corrupted Ethernet frames that are causing those errors. 

In order to proceed further with our troubleshooting we would request you to share the SSU logs.

Help Guide for the Intel® System Support Utility

https://www.intel.com/content/www/us/en/support/articles/000008563/ethernet-products.html

Regards,

Pujeeth

Intel Customer Support Technician

[pujeeth]

Hello KevinCh,

Greetings!!

This is the first follow-up regarding the issue you reported to us.

We wanted to inquire whether you had the opportunity to review the plan of action we provided.

Feel free to reply to this email, and we'll be more than happy to assist you further.

Regards,

Pujeeth

Intel Customer Support Technician

[pujeeth]

Hello KevinCh,

Greetings!!

We wanted to follow up regarding the issue you reported to us. Could you kindly let us know if you’ve had the chance to review the information we previously requested?

Regards

Pujeeth

Intel Customer Support Technician