[ale] IP over USB

[Alex Carver]

AutoMDIX is only needed on one side of the connection.  A 1 Gbps adapter
connected to a 100base-TX device will still work.  I did it yesterday
using a straight cable.

On 2021-09-13 10:12, Phil Turmel via Ale wrote:
> I suspect that having to implement autoMDIX for 1G in these adapters,
> the manufacturer enables it for lower speeds, too.  I use them to
> connect 1:1 with all kinds of industrial machinery, and most of that is
> still 100M or slower.
> 
> I have several of these:
> 
> https://www.amazon.com/gp/product/B013G4C8RE
> 
> They happen to be fully functional with Linux bridges and vlans--not
> always the case in my experience.
> 
> On 9/13/21 11:57 AM, DJ-Pfulio via Ale wrote:
>> On 9/13/21 11:42 AM, Phil Turmel via Ale wrote:
>>>
>>> I don't recall seeing any USB3 ethernet adapters that weren't 1G.
>>
>> I certainly wouldn't buy one today if it wasn't GigE, but ... if the
>> switch isn't GigE, that won't matter ... or if it is some other
>> embedded device with 100 base-TX, then you'll still need a cross-over
>> cable.
>>
>> A few examples,
>> * raspberry pi v2 - 100base-tx
>> * HD Homerun Tuners - 100base-tx
>>
>> So the 100base-tx world isn't gone completely.  I think r-pi v3 ( ~240
>> Mbps peak) and later, follow the GigE standards, but I haven't
>> validated.  r-pi v3 claimed GigE, but the USB shared internals prevent
>> actually pushing that amount of data. r-pi v4 CAN do GigE, I
>> understand. I don't have one of those. Just can't figure out a valid
>> use around here that the existing r-pis don't meet already.
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> 
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