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" > <j...@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
