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ssh into raspberry without a router
(lemmy.ml)
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this post was submitted on 23 Feb 2024
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I remember from back in the day that you need a ~~"twisted pair”~~ edit: ”cross-over” cable though, or do modern ethernet ports automatically adapt to that now?
Twisted pair refers to the twisting of the wires in the cable to reduce crosstalk.
Crossover cables enable permit connecting two non-sensing ports together.
Right 🤦♂️ It has been a while. I corrected it in the original post now.
I hear ya. I know all this stuff, but dammit if it isn't hard to access sometimes! Haha
You're thinking of crossover cables, though I'm not sure if those are still necessary.
Most modern NICs can auto-negotiate the Rx/Tx circuits on either kind of cable, but I'm not sure about RPi.
Only one device needs to be able to negotiate it.
Just about everything made in the last 20 years is capable of doing this.
If I remember correctly, 1000Base-T standard has a requirement that device has to negotiate pinout on the fly. No matter which pin is connected to which. Obvioiusly just randomly wiring a cable up has other problems, like signal-to-noise, but in theory it should work even if you make a cable that's as unstandard as you can make it.
That's amazing. I would love to see the algorithm for that. Hopefully I'll find a nice explainer if I search around.
I think it doesn't matter nowadays. Network interfaces are smart enough to twist them internally, or at least, this is what I experienced. I have no idea when did I had to use specifically a crosswire cable, all of my ethernet cables are patch cables for a while now.
So, it shouldn't be a problem.