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From: Dominic Chen <d.c.ddcc@gmail.com>
To: Muhammad Zain-ul-Abideen <zain2294@gmail.com>
Cc: users <users@dpdk.org>
Subject: Re: [dpdk-users] Same port receive/transmit loopback
Date: Wed, 22 Jan 2020 00:13:17 -0500	[thread overview]
Message-ID: <c83f0eb0-7cee-f0e3-6a9d-26adabbe5bd6@gmail.com> (raw)
In-Reply-To: <CAN7yQ2qYaaUur6uCZXWm6dqqeb2uxa77Lk1w_XvSwbkq5YzeTQ@mail.gmail.com>

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
>
>

  reply	other threads:[~2020-01-22  5:13 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20 22:34 Dominic Chen
2020-01-21  5:47 ` Muhammad Zain-ul-Abideen
2020-01-22  5:13   ` Dominic Chen [this message]
2020-01-23 18:25     ` Muhammad Zain-ul-Abideen

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