Intel Corporation I211 couldn't get llc packets when length bytes incorrect

[RedIce]

The llc packet I used have length bytes not equal with it's true length. I tested Intel Corporation I210 I211 and I350, they're all using igb driver and couldn't get the special packet. But Intel Corporation Ethernet Controller X710 can get it. It use i40e driver. At first I think it's driver issues, then I add printk in function igb_clean_rx_irq and igb_poll at igb driver source code. But seems the packet doesn't appeared in driver. Now I don't know why and where the packet disappeared.

Here is example of the packet:

01 80 c2 00 00 00 00 1e cd 1b 08 db 81 00 ef fe

02 00 00 02 c8 13 01 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

[Mike_Intel]

Hello RedIce,

Thank you for posting in Intel Ethernet Communities. 

Before we proceed, let me clarify if you are designing a board or a system with embedded I211? Can you tell us more about the test you are performing?

If you have questions, please let us know. In case we do not hear from you, we will make a follow up after 3 workings days. Thank you.

Best regards,

Michael L.

Intel® Customer Support

[RedIce]

Hi, there

We're not design board or something hardware(if I get you right). We want to create a network bridge for implement l2 forward llc packet within two I211 interfaces. (We also tested DPDK-l2fwd, but still not worked.)

The system I used is CentOS Linux release 7.5.1804 (Core), the kernel version is 3.10.0-862.el7.x86_64.

Best,

RedIce

[Mike_Intel]

Hello RedIce,

Since you mentioned DPDK and it might help in this issue, please check with Intel Premier Support for further assistance. See the following for access to Intel Premier Support.

Click the "Access and Log In" to contact the DPDK support https://www.intel.com/content/www/us/en/design/support/ips/training/welcome.html

Please be informed that we will now close this request. Just feel free to post a new question if you may have any other inquiry in the future as this thread will no longer be monitored.

Best regards,

Michael L.

Intel® Customer Support