On 5/29/23 14:03, Antonio Carlini via cctalk wrote:
>
> I believe the 10Gb standard specifically prohibits autonegotiation, so
> 10G should not drop down to 1G or 100Mb/s.
Is that maybe only applicable to the 10G standards for optical fibre?
According to Wikipedia 10GBASE-T supports autonegotiati
> I believe the 10Gb standard specifically prohibits autonegotiation, so
> 10G should not drop down to 1G or 100Mb/s.
It drops down to 1gig just fine, at least on everything I've tested. This is of
course over copper, not optical.
Thanks,
Jonathan
On 29/05/2023 00:30, Jonathan Chapman via cctalk wrote
Along those lines, 10gig copper interfaces often don't want to talk to 100mbit
ports! Found that out when we had a switch fail and stuck an older 10/100
switch in just to get back up and running.
I believe the 10Gb standard specifically
Best thing to do is keep an old 10mbit switch or hub around with 100mbit or
gigabit uplink. Second best thing is to have a router that will talk 10mbit
half duplex.
I've also found some poorly behaved stuff that won't autonegotiate duplex even
with older switches, like my 3Com SuperStack II. As
> On May 28, 2023, at 14:18, Paul Koning wrote:
>
> Dropped support for it on 10 Mb links? That seems like a crazy change to
> make. I know it was defined but basically unused at higher speeds.
No just the half duplex part of the standard. The 10 Mb/s full duplex links are
still supported.
> On May 28, 2023, at 1:46 PM, Craig Ruff via cctalk
> wrote:
>
> FYI: The Ethernet standards dropped support for half duplex connections a few
> years back, so that if you have something that depends on half duplex links a
> recent Ethernet switch might not support it.
Dropped support for
I found that out the hard way recently when I acquired my AS/400 and the
10Mb/s card for it. It did not like talking to my 10/100/1000 switch at all.
And of course I had recently gotten rid of my old 10Mb/s hub I had been
saving for a couple of decades... Had to resort to eBay for an ancient hub.
