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And one more data point...when running iperf3 on OPNSense in *client* mode, I get full wire speed. I'm only getting the bad speeds when I run it in *server* mode (AND client mode in reverse).

Does that help? Any suggestions at all?

Thanks,
Peter

Reinstalled OPNSense and iperf3, and test went back to the bad result again - in fact, even worse - 246 Mbits/sec.

Feeling frustrated, I really don't want to use pfSense.

Also to try to narrow things down, I installed pfSense on the same hardware and I got full gigabit throughput. So it's definitely something in the OPNSense distribution/configuration...

I reinstalled the hardware with a clean install of Windows 10, and re-ran the iperf3 test, and got full gigabit throughput. So it's definitely a software configurating/tuning/driver issue with the OPNSense install.

Any ideas?

Hi,

I'm new to opnsense and freebsd but I do have experience on linux, so not a complete newbie.

I've installed the latest opnsense on an HP t740 running an AMD V1756B (4 cores/8 threads) w/8GB of memory. I also installed a dual-port intel i255 PCI card from QNAP, because I intend to eventually upgrade my ISP connection to 2GB fiber. (Right now it's 1GB.) My internal network is all 1GB but eventually I may upgrade it to 2.5 as well, at least for key systems.

Anyhow, I have this system set up only connected to my LAN at the moment so I can learn how to configure it. I installed iperf3 on it and when I run a test from my Windows PC on the same (1GB) switch, I get about about 94 Mbits/s, or 384 Mbits/s for 4 connections. But when I run the test from my Windows PC to my Windows Server on the same network, I get about 235 Mbits/s, or 931 Mbits/s for 4 connections.

I did some googling and found a number of results that talked about setting tunables especially for Intel cards (my interfaces are igc0 and igc1). I've set all of those and rebooted and it didn't make a difference. ifconfig looks normal to me. CPU usage never goes about 5% or so on any core. I've even checked the cable (which is a cat-6 cable) to see if that is the problem.

Other than the tunables I haven't done anything else to the system except set up the basic settings (hostname, gateway, DNS settings, and theme).

Can someone help me figure out what's going on?

Thanks!
Peter