[dpdk-dev] l2fwd does not send packets

[Richardson, Bruce]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Xin Li
> Sent: Wednesday, September 10, 2014 10:19 PM
> To: dev
> Subject: [dpdk-dev] l2fwd does not send packets
> 
> Hi,
> 
> The l2fwd sample application in my environment does not send packets
> through the TX port. I run DPDK inside a KVM guest. The NIC ports are VFs
> assigned to the VM by pci passthrough.
> 
> Environment:
> 
> Host OS: ubuntu 14.04 x86_64
> NIC: intel x540-t1
> Guest OS: ubuntu 14.04 x86_64
> DPDK: v1.7.0
> 
> Some findings:
> 
> 1. l2fwd reports 511 packets sent when max tx descriptor is 512, The number
> changes to 1023 if the max tx descriptor is set to 1024.
> 
> 2. On the receiver side, no packet captured.
> 
> Anyone know the issue and the corresponding fix? Thanks.
> 

One thing that is worth checking is that the source mac address of the packets being sent matches that of the VF interface, as the packets can't be sent otherwise.

/Bruce