Re: [dpdk-dev] Duplicating traffic with RTE Flow

[Asaf Penso <asafp@nvidia.com>]

Hello Jan,

You can have a look in series [1] where we propose to add APIs to DPDK20.11 for both mirroring and sampling for packets, with additional actions of the different traffic.

[1]
http://patches.dpdk.org/project/dpdk/list/?series=12045

Regards,
Asaf Penso

>-----Original Message-----
>From: dev <dev-bounces@dpdk.org> On Behalf Of Jan Viktorin
>Sent: Friday, September 18, 2020 3:56 PM
>To: dev@dpdk.org
>Subject: [dpdk-dev] Duplicating traffic with RTE Flow
>
>Hello all,
>
>we are looking for a way to duplicate ingress traffic in hardware.
>
>There is an example in [1] suggesting to insert two fate actions into the RTE Flow
>actions array like:
>
>  flow create 0 ingress pattern end \
>      actions queue index 0 / void / queue index 1 / end
>
>But our experience is that PMDs reject two fate actions (tried with mlx5). Another
>similar approach would be to deliver every single packet into two virtual
>functions:
>
>  flow create 0 ingress pattern end \
>     actions vf index 0 / vf index 1 / end
>
>Third possibility was to use passthru:
>
>  flow create 0 ingress pattern end \
>      actions passthru / vf index 0 / end
>  flow create 0 ingress pattern end \
>      actions vf index 1 / end
>
>Again, tried on mlx5 and it does not support the passthru.
>
>Last idea was to use isolate with passthru (to deliver both to DPDK application
>and to the kernel) but again there was no support on mlx5 for passthru...
>
>  flow isolate 0 true
>  flow create 0 ingress pattern end actions passthru / rss end / end
>
>Is there any other possibility or PMD+NIC that is known to solve such issue?
>
>Thanks
>Jan Viktorin
>
>[1]
>https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoc.dpdk
>.org%2Fguides%2Fprog_guide%2Frte_flow.html%23table-rte-flow-redirect-
>queue-5-
>3&amp;data=02%7C01%7Casafp%40nvidia.com%7C1a46005bec5245e729e708d
>85bd24caf%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C6373603060
>73519816&amp;sdata=EOF%2Fz62crvBZK8rwzwKIWxj5cVlfPVnU3FLmcL9X2w0%3
>D&amp;reserved=0