Re: rge(4) RTL8125 2.5GbE testing: 2500baseT media type not available on 16.0-CURRENT

From: Adrian Chadd <adrian_at_freebsd.org>
Date: Fri, 06 Mar 2026 15:59:58 UTC
On Thu, 5 Mar 2026 at 14:02, Olivier Cochard-Labbé <olivier@freebsd.org> wrote:

> It shows a negotiated speed of 2.5G:
>
[snip]

> However, I am experiencing the same 100Mb/s (yes 100) limitation that occurred on both Ubuntu (with both the default r8169 and official Realtek r8125 driver) and Windows:
> Despite the reported link speed, the actual throughput is capped 100Mb/s:
>
> olivier@fbsd:~$ iperf3 -c 192.168.100.1
> (...)
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bitrate         Retr
> [  5]   0.00-10.06  sec   113 MBytes  94.3 Mbits/sec    0            sender
> [  5]   0.00-10.08  sec   113 MBytes  94.1 Mbits/sec                  receiver

Is it 100mbit when you neg at 1gbit? or only at 2.5g?



-adrian