[Intel-wired-lan] igb: Random NIC down for 3-4 seconds and then UP

[Fujinaka, Todd]

Usually things like this are hardware-related when dealing with mature drivers.

Is there any way you can file this through your factory support because we're going to need a lot more detail. We don't usually handle issues through email unless you want to go through Intel Customer Support.

We'll need to know OS, driver, hardware, link partner, kind of traffic, etc.

Thanks.

Todd Fujinaka
Software Application Engineer
Data Center Group
Intel Corporation
todd.fujinaka at intel.com

-----Original Message-----
From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of Nguyen, Anthony L
Sent: Tuesday, June 8, 2021 4:19 PM
To: intel-wired-lan at osuosl.org; mantykuma at gmail.com
Subject: Re: [Intel-wired-lan] igb: Random NIC down for 3-4 seconds and then UP

On Fri, 2021-06-04 at 14:42 +0900, manty kuma wrote:
> We see random NIC down like shown below. It lasts for a few seconds 
> and then the connection is back up.
> 
> From kernel Log:
> ```
> [ 3306.560431] igb 0000:03:00.0 enp3s0: igb: enp3s0 NIC Link is Down [ 
> 3309.532558] igb 0000:03:00.0 enp3s0: igb: enp3s0 NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX\/TX
> 
> [ 3337.380117] igb 0000:02:00.0 enp2s0: igb: enp2s0 NIC Link is Down [ 
> 3341.672189] igb 0000:02:00.0 enp2s0: igb: enp2s0 NIC Link is Up
> 100 Mbps Half Duplex, Flow Control: None ``` Steps to reproduce: 
> Unknown. Happens randomly
> Frequency: once in a couple of weeks so far.
> 
> Kernel: 5.10
> Firmware version: 3.25, 0x800005cf
> driver: igb
> 
> Is it a known issue?
> What can we do to better understand the reason for this behavior and 
> fix it?

Hi Manty,

I'm not aware of this as a known issue, but I've filed an internal bug so that it can be looked into further. Could you provide the lspci info for the device? Also, if you have any info that might be helpful such as occuring under traffic or when idle, etc.

Thanks,
Tony

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