Reply by Hans-Bernhard Broeker●February 19, 20042004-02-19
Alan Nishioka <alann@accom.com> wrote:
> How does an ethernet auto uplink port work?
In a nutshell: look at what happens on both lines for while, see if it
makes sense --- if it doesn't, try turning them round. Restart
procedure from the beginning.
Problems typically happen if you connect two devices that have the
exact same time constants built into this algorithm --- they'll both
keep switching over at the same instant, and never reach a solution.
> Is it covered by any standard?
Up to 100baseT, apparently not. But 1000baseT made this a required
feature, and documented how exactly it's supposed to work.
--
Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de)
Even if all the snow were burnt, ashes would remain.
Reply by Alan Nishioka●February 19, 20042004-02-19
Auto uplink swaps the tx and rx lines of an ethernet port so you don't
need crossover cables.
How does an ethernet auto uplink port work?
Is it covered by any standard?
I have a device that doesn't work and I suspect auto uplink is
interfering with it.
Alan Nishioka
alann@accom.com