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Bug#892105: i40e



Hi,

On Fri, May 03, 2019 at 10:38:16AM +0000, Dominik Dausch wrote:
> On Fri, 29 Jun 2018 09:33:56 +0200 "=?utf-8?q?J=C3=B6rg?= Kost" <jk@ip-clear.de> wrote: 
> > Run into a similar issues with i40e. I found out that the i40e driver 
> > included in linux-image-4.9.0-6-amd64 drops ARP requests randomly if the 
> > interface is not configured into promiscuous mode (e.g. tcpdump 
> > running). Therefore if the switch / router expires or invalidates its 
> > arp cache, the system may not be reachable until the next ARP request 
> > will get randomly accepted & answered. 
> 
> We have the same problem here with the newest Stretch 4.9 kernel.
> When using a secondary IP address the i40e driver starts to randomly
> ignore ARP requests and makes the system unreachable for the rest of
> the network.
> Upgrading to a backport kernel (4.19) with newer 4.19 driver fixes
> the problem.
> 
> Is there a change to backport a fix into 4.9 stable? I40e is a very
> widely used driver for Intel NICs.

Can anyone of the affected users -- if feasible -- try to help on
isolating the issue?

https://kernel-team.pages.debian.net/kernel-handbook/ch-bugs.html#s9.1.5
and
https://kernel-team.pages.debian.net/kernel-handbook/ch-bugs.html#s9.2.1
can give some help to isolate the fixing change.

Regards,
Salvatore


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