On Thu, May 25, 2023 at 02:47:06PM -0400, Paul Koning via cctalk wrote:
>
>
> On 2023-05-25 5:52 a.m., Tony Duell via cctalk wrote:
> > ...
> > It is not unheard-of for classic PCs -- even ISAbus ones -- to have
> > 10Mbps ethernet. Most, if not all, 100Mbps ethernet ports will fall
> > back to that.
>
> Not only that, but all correctly implemented GigE devices will fall back not
> just to 100 but also to 10 Mb/s. That's part of standards conformance, and
> from what I can tell even low cost devices like D-Link or Netgear do this.
> Yes, including half duplex mode.
>
Yup, had that happen on one of my machines with a 100 MBit/s NIC wired to
a GBit switch. It dropped all the way down to 10 MBit/s half-duplex and
still lost packets at a hilarious rate - because the cable had gone bad.
After replacing the cable it was back to 100 MBit/s.
But the point is: the GBit switch followed along all the way down to
10 MBit/s half-duplex "hey, if that's all you can do, fine", just as
the spec said it should.
Kind regards,
Alex.
--
"Opportunity is missed by most people because it is dressed in overalls and
looks like work." -- Thomas A. Edison
