[Cerowrt-devel] LCA 2018 talk available

Mikael Abrahamsson swmike at swm.pp.se
Wed Feb 14 06:33:21 EST 2018

On Thu, 25 Jan 2018, Joel Wirāmu Pauling wrote:

> Kia Ora (Hi in Māori).
> Today I delivered my talk on 10Gbit(+) in the home at Linuxconf
> Australasia. Some specific shout outs to those on the list who helped form
> some of the content and especially for the continued efforts with FLENT
> which I have been making extensive use of both professionally and privately.
> Hopefully this is of some interest and use to people on the list.
> https://github.com/aenertia/lca2018-talk/tree/talk

Great presentation, thanks.

Some feedback. I have been told MOCA is widely used in USA, and this is 
in-house coax cabling used for providing IP based services in multiple 


Now, this doesn't have much to do with your 10GE talk as it's not going to 
be that fast, but anyway. So back to > 1GE speeds.

It seems to me that 1GE is good enough for a lot of user needs. It's over 
100 megabyte/s, most HDDs won't even transfer faster than this. Most 
devices do not have anything faster than 1GE, so it's a chicken and egg 
problem. I have a 100EUR fanless managable 24 port switch with 4 SFP 
ports. I imagine anything faster than this would require fans and would 
bring up the cost a lot.

It would be ideal to have a 24 port 1GE + 4 (or 8) ports of 1/2.5/5/10GE 
for incremental migration, but I have 0 things in my home that speaks 
anything faster than 1GBASE-T (with RJ45 connector). I do have SFP+ based 
NIC cards and DAC cables, but I don't even use them (apart from occasional 

The upgrade was from 100BASE-T to 1GBASE-T was fairly cheap and addressed 
a wide need, since 10-11 megabyte/s was slower than most HDDs even 15-20 
years ago. Today, 100-110megabyte/s at 1GBASE-T speeds is actually still 
quite decent, and most people don't have huge amounts of data to move 
around. So for most people, anything faster than 1GBASE-T doesn't address 
a problem they actually have. Yes, for people handling 4k footage and 
doing video editing etc, they need faster. But most people don't. For them 
a 8-24 port 1GBASE-T switch is fine, and provides a networking solution 
that is not bottlenecking them in any significant fashion.

2.5G and 5G would be a good compromise, but it seems to be stuck in 
chicken/egg problem space. Most people actually don't even wire their 
computers today, it's all wifi, and even if they do wire them, the only 
NIC available is 1GBASE-T based.

The iMac Pro is the first prosumer device I have seen that actually 
supports faster networking. If Apple or someone else actually released a 
thunderbolt based NIC that was decently sized/priced that did support 2.5G 
or 5GBASE-T, then this chicken/egg problem could perhaps be solved. Most 
people don't feel the need to connect these kinds of things to their 


http://www.tehutinetworks.net/?t=LV&L1=3&L2=0&L3=0&L7=157 is interesting, 
as this is not huge. It also does 2.5G and 5G.


300USD is still a significant chunk of money compared to the 29USD 
1GBASE-T thunderbolt2 adapter that Apple sells.

But still, with these kinds of products, there might be hope!

Mikael Abrahamsson    email: swmike at swm.pp.se

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