I have a follow-up on this: ixgbe version 3.13.10-k ixgbevf version 2.7.12-k
(These are what was provided by Ubuntu 13.10) I tried the following sequence on the host, before starting the guest: 1) sudo rmmod ixgbe 2) sudo modprobe ixgbe max_vfs=2 3) sudo ifconfig em1 up # This is the physical function 4) sudo ifconfig em1_0 192.168.2.2 # This is the virtual function 5) ping 192.168.2.1 I can see that the ping request reaches its target, and a reply is sent back. But this reply is not received by the ping shell command. Why? Regards, Mats On Wed, Jan 29, 2014 at 6:56 PM, Mats Liljegren <liljegren.mats2 at gmail.com> wrote: > I'm trying to get a modified version of the l2fwd example running, and > have problems with packets being silently thrown away. I can receive > packets, and my printf's indicates that the packets are being sent to > the correct port, using correct MAC address as source address. And > still, the packets are lost. > > Since the port is a virtual function, it seems like I cannot use > tcpdump on it to see the network traffic. There is nothing coming out > of the cable (activity light not flashing, the receiving end running > tcpdump does not see any traffic). > > I'm using two X540 with two virtual functions each. The application > runs in a KVM/Qemu environmen. > > Any suggestions how to debug this? > > Regards, > Mats