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From: Jim Jackson <jj@franjam.org.uk>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Pi as main storage and server.
Date: Sat, 30 Sep 2023 20:50:48 -0000 (UTC)
Organization: A noiseless patient Spider
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On 2023-09-30, Chris Green <cl@isbd.net> wrote:
> Theo <theom+news@chiark.greenend.org.uk> wrote:
>> The Natural Philosopher <tnp@invalid.invalid> wrote:
>> > Oh no, me mate and I wired the whole house to full CAT5/structured 
>> > cabling standards . BUT that isn't necessarily good enough for gigabit.
>> > Cable might have too much attenuation.
>> 
>> Many domestic installations don't get anywhere near the 305m that's the max
>> in the ethernet spec.  So you can get away with out of spec cabling because
>> the spec expects the attenuation from 305m but you only have 30m.
>> 
>> Try it and see?  Patch a couple of ports together (without using a switch),
>> put a machine at each end and see if a gigabit link will come up and stably
>> pass traffic.  You might be surprised.
>> 
> Yes, my experience is that tens of metres of home made (by me) CAT5
> UTP cable does gigabit quite happily.

And if it's cat5E then 100m or more works