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How engineers at Digital Equipment Corp. saved Ethernet

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Re: How engineers at Digital Equipment Corp. saved Ethernet

#11
post #6

Earlier quoted context omitted.

I think the great architectural challenge would be - how does one add that byte to the IP header in a non-breaking way?

There's a surprising number of people who think you could magically expand the IPv4 address space in a backwards compatible manner.

It would be great if its true! Perhaps its really there and we're all just blind to it? Unlikely, but I'm willing to be surprised.

Re: How engineers at Digital Equipment Corp. saved Ethernet

#12
post #11

Earlier quoted context omitted.

There's a surprising number of people who think you could magically expand the IPv4 address space in a backwards compatible manner.

It would be great if its true! Perhaps its really there and we're all just blind to it? Unlikely, but I'm willing to be surprised.

Unfortunately none of those people have explained how it could be done in enough detail that I could try it. Most walk away when pressed but a few press on telling me it is easy so shut up and do it .

Re: How engineers at Digital Equipment Corp. saved Ethernet

#13
post #11

Earlier quoted context omitted.

There's a surprising number of people who think you could magically expand the IPv4 address space in a backwards compatible manner.

It would be great if its true! Perhaps its really there and we're all just blind to it? Unlikely, but I'm willing to be surprised.

Well I don’t see how you could do it without upgrading equipment and software to support it. And then to start using the new ip scheme.

Which starts to sound an awful lot like an IPV6 migration.

Re: How engineers at Digital Equipment Corp. saved Ethernet

#14
post #6

Earlier quoted context omitted.

I think the great architectural challenge would be - how does one add that byte to the IP header in a non-breaking way?

There's a surprising number of people who think you could magically expand the IPv4 address space in a backwards compatible manner.

But this was what literally happened. All routers today support NAT and most of them actively use it. Isn't it a magical form of extended IPv4 address space? Could have been easily done in less band-aid fashion instead of chasing IPv6.

Re: How engineers at Digital Equipment Corp. saved Ethernet

#15
post #12
post #11

Earlier quoted context omitted.

It would be great if its true! Perhaps its really there and we're all just blind to it? Unlikely, but I'm willing to be surprised.

Unfortunately none of those people have explained how it could be done in enough detail that I could try it. Most walk away when pressed but a few press on telling me it is easy so shut up and do it .

Similar to how it has been done with phone numbers. I saw this done in Brazil for example. You add a digit to the front and put all existing address on 0.*. Short number dials are assumed to be 0.*. Update OS and hardware. Then you allocate across the new digit much later as time goes on.

The thing with phone infrastructure though is that it is centralized. So may happen in a reasonably coordinated rollout. Global internet is a lot more distributed so it would take a very long time.

The open question is, would it take longer than IP6 has? Maybe not. Part of the reason I didn't care to use it early was because of the long addresses. If we could get a five byte address written in hex it would be somewhat user friendly.

Re: How engineers at Digital Equipment Corp. saved Ethernet

#16
post #2

What a great story. The spanning tree algo is under appreciated: this allowed people who didn’t understand networking to plug networks together the way you would plug extension power cables together,* making networking simple ( or alternatively insanely broken, when people had 400 computers on a single LAN with a rat’s nest of bridges and hubs…but unlike the extension cord case, nothing would catch literal fire). * d…

Not recommended but these bad boys make a lot of things work, and cause a lot of damage! https://m.media-amazon.com/images/I/61A5WvzcgsL._AC_UL960_QL...

Re: How engineers at Digital Equipment Corp. saved Ethernet

#17
post #5
post #2

What a great story. The spanning tree algo is under appreciated: this allowed people who didn’t understand networking to plug networks together the way you would plug extension power cables together,* making networking simple ( or alternatively insanely broken, when people had 400 computers on a single LAN with a rat’s nest of bridges and hubs…but unlike the extension cord case, nothing would catch literal fire). * d…

Occasionally people don't understand how to plug extension power cables together, either, especially during times of high stress and low sleep. Once upon a time, when I was in IT support, I got a call from someone in a satellite office across town saying that their computer wouldn't turn on. A new production had begun and everyone was a bit frantic, so this was an urgent request. After asking them to hold the power s…

I was really hoping for some never before known knowledge of how to connect Extension Cables and Power Boards together!

But no, turns out someone didnt even manage the basics! LOL

There's a reason the IT Crowd have the running joke of 'have you tried turning it off and on again...'! :-)

Re: How engineers at Digital Equipment Corp. saved Ethernet

#19
post #5

Earlier quoted context omitted.

Occasionally people don't understand how to plug extension power cables together, either, especially during times of high stress and low sleep. Once upon a time, when I was in IT support, I got a call from someone in a satellite office across town saying that their computer wouldn't turn on. A new production had begun and everyone was a bit frantic, so this was an urgent request. After asking them to hold the power s…

I was really hoping for some never before known knowledge of how to connect Extension Cables and Power Boards together! But no, turns out someone didnt even manage the basics! LOL There's a reason the IT Crowd have the running joke of 'have you tried turning it off and on again...'! :-)

In all fairness, the person had obviously been awake for over 24 hours and was on their 1,001st cup of coffee. And since earlier in the summer I had crashed the entire ticket scanner network the night before the opening of the weekend festival we had put on by creating a network loop between a couple of non-spanning-tree-speaking network devices, I didn't feel I was in a place to be snarky about it!

Re: How engineers at Digital Equipment Corp. saved Ethernet

#20
post #14

Earlier quoted context omitted.

There's a surprising number of people who think you could magically expand the IPv4 address space in a backwards compatible manner.

But this was what literally happened. All routers today support NAT and most of them actively use it. Isn't it a magical form of extended IPv4 address space? Could have been easily done in less band-aid fashion instead of chasing IPv6.

How?
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