> wrote: I was wondering how I can send/receive packets from my computer to my serve= r which has dpdk running. Since what seems to happen is that dpdk binds to = the ethernet device, what would be its IP address? For example how would I send a ping from one computer to my server with dpd= k binded to the NIC? Would I send a packet with only MAC address and dpdk binded NIC would pick = it up and move the packet up to dpdk and then to the user space? Just kind = of confused how that works. I would be grateful for any help! Peter --_000_CED3AAF9FD13441C9A83145F3E0EBB7Fwindrivercom_ Content-Type: text/html; charset="iso-8859-1" Content-ID: <982A14C15ED61649A35E6D4FB08C54E7@local> Content-Transfer-Encoding: quoted-printable Hi Peter,

When DPDK is running on the server it takes control of the ports, whic= h means the network stack that would answer a ping (ICMP Echo) would not be= attached to the port any more. You would have to add code to DPDK as an ap= plication to receive the ICMP Echo packet and respond with a ICMP Reply packet. The other method would be to = attach a network stack as the application to DPDK and use that network stac= k to receive and send packets.

Writing a simple DPDK application to receive packets off the ports and= look for ICMP Echo request and to respond with a ICMP Echo reply is not th= at hard as I do that work in Pktgen. If you want to do more then just grab = packets and determine if you need to send out a packet you would need to port some stack on top of DPDK like= lwIP. You can this other ways, but it would take a bit more text to descri= be.

Have a look at Pktgen on GitHub and you can look at that code for a ba= sic example.

Thank you, ++Keith
-------------------------------
Keith Wiles
Principal Technologist for Networking
cell 972-213-5533
Wind River Systems

On Jun 23, 2013, at 11:52 PM, Peter Chen <peter.feifan.chen@gmail.com>

wrote:

I was wondering how I can send/receive packets from my com= puter to my server which has dpdk running. Since what seems to happen is th= at dpdk binds to the ethernet device, what would be its IP address?
For example how would I send a ping from one computer to my server with dpd= k binded to the NIC?

Would I send a packet with only MAC address and dpdk binded= NIC would pick it up and move the packet up to dpdk and then to the user s= pace? Just kind of confused how that works. I would be grateful for any hel= p!

Peter

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