Re: [dpdk-users] Same port receive/transmit loopback

[Muhammad Zain-ul-Abideen <zain2294@gmail.com>]

Kindly share what you are sending vs what you are receiving and some more
detail on the environment configuration

On Wed, Jan 22, 2020, 10:13 AM Dominic Chen <d.c.ddcc@gmail.com> wrote:

> I've verified with testpmd that the connection works. Since I'm in a
> virtual machine, I don't have a physical cable to loopback, so I added
> more virtual NICs and bridged them externally. I've also submitted a
> patch to the e1000 driver to add support for loopback mode. I don't have
> the physical hardware, so I can only verify that it works in QEMU with
> e1000 and e1000e.
>
> Dominic
>
> On 1/21/2020 12:47 AM, Muhammad Zain-ul-Abideen wrote:
> > Hey there, have you used packetgen to verify. Build pktgen app and
> > loopback your cable to recieve what you send on the port to verify please
> >
> > On Tue, Jan 21, 2020, 3:34 AM Dominic Chen <d.c.ddcc@gmail.com
> > <mailto:d.c.ddcc@gmail.com>> wrote:
> >
> >     I've just started working with DPDK recently, and I'm a little
> >     confused
> >     by the intended behavior when transmitting and receiving on the
> >     same port.
> >
> >     Currently, I haven't been able to receive the same packet that I
> >     transmitted, regardless of the source/destination MACs on the
> Ethernet
> >     packet (broadcast, self, etc), or whether the port is in promiscuous
> >     mode. I've verified from other hosts on the network that my
> >     packets are
> >     being sent, that I am able to receive packets (as long as I didn't
> >     send
> >     them), and that I get the same behavior when using vfio-pci with both
> >     e1000 and vmxnet3 (emulated in VMware).
> >
> >     Is there some built-in source MAC filtering that I'm missing? Or do I
> >     have to enable loopback mode?
> >
> >     Thanks,
> >
> >     Dominic
> >
> >
>