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Ethernet Is Still Going Strong After 50 Years

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Re: Ethernet Is Still Going Strong After 50 Years

#141

Post by a-priori »

teeray wrote: post #129
thehappypm wrote: post #40

Earlier quoted context omitted.

I do this too and it is terrific, literally indistinguishable from ethernet. What’s amazing is you can run cable and MoCa on the same wire at the same time!

How does this work with both? Is there a defined band plan standard that cable operators know to avoid? Do you need to install a notch filter on the line coming into the house?

It's more the other way around. There's a defined band plan, because historically cable TV was just transmitting radio signals over coaxial cable instead of radio, so it inherited the broadcast TV band plan. Then digital TV inherited the analogue cable band plan and added higher-frequency channels.

To answer your question, cable TV uses frequencies between about 55MHz to 1GHz, but mostly starting at about 500MHz for digital cable. So if I wanted to transmit Ethernet over cable, I'd use a 2GHz band or something to avoid interference.

Re: Ethernet Is Still Going Strong After 50 Years

#142

Post by Koshkin »

breadwinner wrote: post #103

Metcalfe, inventor of ethernet, predicted in 1995 that the internet would collapse the next year, because the underlying tech couldn't possibly scale. He ended up having to literally eat his own words. See: https://en.wikipedia.org/wiki/Robert_Metcalfe#:~:text=24%5D%...

This is one of the rare examples when the word "literally" means what it says.

Re: Ethernet Is Still Going Strong After 50 Years

#143

Post by chpatrick »

LeanderK wrote: post #88
velcrovan wrote: post #73

Earlier quoted context omitted.

The few times I have run into these, the actual performance is terrible. Wifi is almost always better.

it's been 10 years but I had great success running internet into the basement this way. Wifi was terrible down there (router was in the upper floor) and there wasn't an existing ethernet cable going down. Of course it wasn't perfect but it was trivial to set up and worked.

Same for me, my parents house had no WiFi signal downstairs or Ethernet in the walls. A powerline wifi extender kit worked out of the box and is fast enough for their needs.

Re: Ethernet Is Still Going Strong After 50 Years

#145

Post by yieldcrv »

jmathai wrote: post #33

This is a comment for folks in homes with coax run for cable TV. Ethernet is great. I wired ethernet to most rooms in our remodel and set up wired access points or jacks in the office to connect directly to my computer. The speeds and consistency over wifi and mesh were remarkable. Especially consistency. We moved, and it's not feasible to run ethernet everywhere in our current home. However, whoever built the home r…

I actually couldn’t get ethernet at fast enough speeds compared to wifi over the last couple years

with wifi over 1gbps and Ethernet stuck at 100mb/s or a single port of 1gbps or a single one that’s faster and none of my devices having that port or the cat5e wires being questionable

what time span were you talking about? Was this decades ago?

Re: Ethernet Is Still Going Strong After 50 Years

#146

Post by freedomben »

velcrovan wrote: post #73
frankjr wrote: post #67

Earlier quoted context omitted.

Another way to get something supposedly more stable than wifi when ethernet cabling is not feasible is to use your house's electric wiring and run data through that. There are kits which offer data rates in gigabits (although based on a few reviews I read the actual speed vary greatly). https://en.wikipedia.org/wiki/Power-line_communication https://www.tp-link.com/us/home-networking/powerline/tl-pa70...

The few times I have run into these, the actual performance is terrible. Wifi is almost always better.

Same. It was great 10 years ago, but wifi speeds at this point make the wired through electric lines painfully slow. Even with the occasional wifi hiccup, wifi is almost always better.

Re: Ethernet Is Still Going Strong After 50 Years

#148

Post by eqvinox »

NovemberWhiskey wrote: post #108
eqvinox wrote: post #93

Earlier quoted context omitted.

> Jumbo frames could be a thing on the internet It being a thing on "the internet" would require it being a thing on a sizable majority of the internet. You'd need to get large network operators, peering points, user-facing ISPs, and even users themselves on board to change their setups. And Path MTU discovery is still sufficiently unreliable as to make it incredibly painful to have partial large-MTU networks. And if…

This the same argument why IPv6 can't be a thing on the internet; I agree that the book isn't closed entirely on that yet, but very significant progress has been made.

Except disruptions (i.e. worse service than IPv4 only) from rolling out IPv6 are the exception while disruptions from rolling out jumbo frames are absolutely the norm.

Re: Ethernet Is Still Going Strong After 50 Years

#149

Post by ihattendorf »

ForkMeOnTinder wrote: post #138
eqvinox wrote: post #38

Earlier quoted context omitted.

If you want to be picky, you need to get it right first. The actual term is frame . datagram is generally used to refer to layer 4 operation, and the term is not used anywhere in IEEE 802.3. Also the GP is correct to say we fossilized on 1500 byte packets, since the layer 3 MTU is the relevant thing when talking about fossilization in the internet at large. This number was driven by 802.3's standard frame size being…

> You can't roll out larger packets on the internet. Devil's advocate: why not? We're in the middle of a long-term push for IPv6, and we have interim solutions to help the migration like Teredo tunneling. It's slow going, but we'll get there eventually. Why don't we start a similar global migration to jumbo frames?

What's the backwards compatibility story here? Send out dual 1500/9000 packets? I don't see how that would work for the billions of devices in the wild without replacing everything but maybe there's a better solution that doesn't take 30 years.

Re: Ethernet Is Still Going Strong After 50 Years

#150

Post by freedomben »

tiberious726 wrote: post #120
Symbiote wrote: post #90

Earlier quoted context omitted.

Mine is, in theory, 2Gb/s. In practise, nearer 50Mb/s. It also causes interference on my amplifier, although it's a cheap amplifier. About once a year one of the adaptors loses its connection to the other adaptor, and instead connects to someone else's setup in this apartment building.

That shouldn't be happening, and is a massive security/privacy issue. Your power line devices should be configured to use an encryption key unique to them.

Yep, GP should do a factory reset on both, and pair them. If it stil happens after that, replace them with models that don't have this problem!
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