[dpdk-dev] How to add veth interfaces in dpdk

[Sachin Sharma]

Hi Marc,


I have limited number of nodes (Linux nodes)  in my testbed. So, I
wanted to use veth interfaces for creating some of dpdk nodes in my
nodes.  You said that I can use KNI interfaces for this purpose. I am
very new to KNI terminology. Could you please redirect me to a
tutorial to create links with KNI interfaces and then adding those KNI
interfaces into dpdk?



Thanks & Regards,

Sachin.


On 12/12/14 14:34, Sachin Sharma wrote:
>* Hi all,
*>>* I have created veth interfaces using  command "sudo ip link add veth1 type
*>* veth peer name veth2". However, when I use command "sudo
*>* ./tools/igb_uio_bind.py --force --bind=igb_uio veth1" to add veth into
*>* dpdk. It gives me an error that "Unknown device: veth1. Please specify
*>* device in "bus:slot.func" format". I do not see even veth interfaces using
*>* command "sudo ./tools/igb_uio_bind.py --status". Is there any way that I
*>* can add these interfaces into dpdk?
*
>veth are software interfaces, meaning there is no real NIC behind.
>That's why you cannot bind them to igb_uio.

>You can use KNI interfaces for communicating a DPDK application with the
>kernel interfaces and viceversa. There is an overhead on doing so, but
>whether this is an appropriate solution or not, depends on your use
>case. What do you plan to do?

>Marc



On Fri, Dec 12, 2014 at 2:34 PM, Sachin Sharma <sharonsachin at gmail.com>
wrote:
>
> Hi all,
>
> I have created veth interfaces using  command "sudo ip link add veth1 type
> veth peer name veth2". However, when I use command "sudo
> ./tools/igb_uio_bind.py --force --bind=igb_uio veth1" to add veth into
> dpdk. It gives me an error that "Unknown device: veth1. Please specify
> device in "bus:slot.func" format". I do not see even veth interfaces using
> command "sudo ./tools/igb_uio_bind.py --status". Is there any way that I
> can add these interfaces into dpdk?
>
>
> Regards,
> Sachin.
>