Message-ID: <687aece9@news.ausics.net>
From: not@telling.you.invalid (Computer Nerd Kev)
Subject: Re: Learned Something New About Ethernet Today
Newsgroups: comp.misc
References: <105cq8m$1thhp$1@dont-email.me>
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Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
> Today I discovered that there are Ethernet interfaces that are not 
> backward-compatible with older, slower speeds. Specifically, anything 
> using the Intel X722 controller chip can do 1-gigabit and 10-gigabit, but 
> not 100 megabits or 10 megabits per second. Connect it to a 10/100 switch 
> port and ... silence.

A quick search suggests that controller is targeted at servers.
Does it connect to any physical ports with connectors that are
used for 10/100 Ethernet? I'd expect them only to be used with
the higher speed Ethernet connectors used on servers, which I
don't know of being used for 10/100 interfaces. Such servers
might use a different controller chipset for any RJ45 Ethernet
sockets.

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