What hardware have you used for T-Rex? About 1.5 years ago I managed to get about ~400 Mpps / ~800 Gbps on a single 16 core machine ( https://nog.fi/event/26/contributions/191/attachments/120/262/Generating%201%20Tbps.pdf - slide 39, it was 128b packets), same machine could do about 600 Mpps with 64 byte packets and you can tune the packet size to get around 600 Mpps.
Frankly speaking, my NICs on those boxes were capable of 200G per port only. On Wed, 14 Oct 2026 at 13:12, Dinesh via lists.fd.io <dinesh.g= [email protected]> wrote: > Hello everyone, > > What is the best tool for linux to test 400 gbps throughput in vpp ? > > My setup is like below. > > Lan -> Vpp -> Router (Pumping traffic from lan host to router) > > I want to test both ipv4 and ipv6. I tried with dpdk-testpmd and it > works good with ipv4, but there is no support for ipv6 i guess. > > I also tried with T-rex , but somehow t-rex source code is > hard-capped at 200gbps. > > > Thanks, > Dinesh > > > > > -- Best regards, Vladimir Smirnov.
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