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