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2025-09-22 02:53:42 UTC

Alex Kretzschmar on Nostr: iperf3 showing me a ton of retries only on TX. I have replaced the cable twice, the ...

iperf3 showing me a ton of retries only on TX.

I have replaced the cable twice, the sfp/rj45 converter and booted into a different OS (to rule out kernel drivers as it’s an i226 NIC). Speeds are about 20-30% less than I would expect on a 2.5gbe NIC.

It’s an onboard mobo NIC. Safe to assume at this point that NIC is the culprit?