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Bandwidth test issues with Sensei


I recently installed the sensei plugin for opnsense.  I love what I am seeing so far, but I seem to be having an issue with the netmap config.  When I choose native netmap, I get half of my 1G fiber speeds.  I usually hit around 940/940 with Sensei enabled on my LAN interface. When I choose the generic netmap driver, I get great download speeds, but my upload is less than 1Mbps.  I think this is telling me that the generic driver works best for my download, but I can't imagine why my upload is doing so bad.

What’s your CPU and which network card?

OPNsense 21.7.3_3-amd64
OpenSSL 1.1.1l 24 Aug 2021

Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz (4 cores)

8GB memory

Intel NIC 1GB

I figured out my problem.  I cannot explain why, but I enabled all interfaces except for WAN and my speed is now what it should be in the speed tests.

Only use Sensei on the interfaces where your clients live, I‘d suggest. WAN interfaces are not really needed, might create additional overhead and if you run Suricata on the same WAN, even conflicts.


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