[dpdk-dev] IXGBE VF on KVM - Transmit stalled after switch reboot

[sujith sankar]

Hi,

We are seeing a stall in packet transmission from VF after a network
switch (Nexus 9000) restart.  The packets sent out on ixgbe-vf are not
seen on the wire.  Is this expected when the switch restarts?  Is a
re-init of VF expected from PMD?

The application, which is based on DPDK 16.04, is running inside an
Ubuntu VM on KVM.  It uses a VF that has been passed through to the VM
and the PF is owned by Linux kernel mode driver.

PF is able to transmit packets.  VFs that are inside the VM and that
are not claimed by DPDK are also working fine.  I feel that there is a
recovery sequence that is expected from the application/PMD in such a
case.

It would be great if IXGBE PMD maintainers or someone who is familiar
with this could help us.  Kindly let me know if you have questions.

Thanks,
-Sujith Sankar
 Avi Networks (India) Pvt Ltd.